Window Replacement Costs VIC 2026 - Get Free Quotes

Window Replacement Costs in Victoria

Replacing a window in Victoria runs $500 to $2,500 supplied and installed, which puts a house of ten to fifteen windows between $9,000 and $28,000. Standard aluminium sits at the bottom of that band and timber or composite at the top, with thermally broken aluminium and uPVC filling the middle. Those figures cover the window and its fitting, and making good the wall around it is usually a separate line. Window quotes vary more in what they exclude than in the headline rate. Hinges and stays corrode faster on coastal elevations. Handles and locks are adjusted at handover.

Two decisions account for most of the variation and both get made badly. The first is whether to double glaze, which people either dismiss as an expensive extra or treat as an automatic upgrade without checking the numbers for their own house. The second is whether to replace whole windows or retrofit new glazing into frames that are still sound. Getting either decision wrong costs thousands of dollars. Sealed unit failure is covered by most manufacturer warranties.

Melbourne's weather patterns alter the double glazing calculation in a way national advice rarely captures. This is a heating dominated city, with roughly six months of the year when the house is losing heat through the glass rather than gaining it. That makes the payback quite different from Brisbane, where cooling load dominates, and it means the benefit shows up in winter comfort as much as in the bill. Two installers can price the same house very differently. Energy performance figures appear on the window label. Compare U-value and solar heat gain together.

Condensation is the reason many Victorian households replace windows at all, and it is worth naming because it is fixable. Single glazed aluminium frames run cold enough through a Melbourne winter that indoor moisture condenses on the glass and the frame, pooling on sills and eventually growing mould. Frame material affects thermal performance as much as the glass does. Spacer bars at the edge of a sealed unit carry their own rating. Seals around opening sashes perish with ultraviolet exposure.

Two Victorian constraints can override your material preference entirely and both need checking early. A heritage overlay on the property may require timber frames in a specific profile, which rules out aluminium and uPVC regardless of budget. A bushfire attack level rating in a designated area imposes glazing and screening requirements that escalate sharply at the upper levels. Both need checking with the council before anything is ordered. Temporary boarding covers any opening left overnight. Confirm that arrangement before work starts.

Access is the quiet cost driver on any multi storey job. Scaffolding runs $800 to $2,500 for a typical house and is charged for the setup rather than per window, so replacing one upstairs window costs disproportionately more than replacing all of them at once. Sequencing work by floor rather than by room is how households avoid paying for that twice. Most households do this once in twenty years. Draught proofing an existing sash is far cheaper than replacing it.

The sections that follow cover each frame material, glazing specifications in plain terms, the honest case for and against double glazing, retrofit against full replacement, and the process from measure to make good. Pricing and Victorian site conditions follow, and related work sits under window installation and repairs. Pricing and Victorian site conditions follow toward the end. Argon fill improves the U-value of a double glazed unit.

Frame Materials Compared

Frame material decides thermal performance, appearance, maintenance and roughly half the price. Australian homes have historically defaulted to aluminium for reasons of cost and durability, and that default is worth examining rather than accepting. The consequences appear after a winter or two rather than at handover. Low emissivity coatings cut radiant heat transfer through the glass. Secondary glazing is another option in heritage properties. Manufacture typically follows two to four weeks after measure.

Standard aluminium is the cheapest option at $500 to $900 per window and it conducts heat extremely well, which is precisely the problem. The frame itself becomes a thermal bridge, carrying warmth straight out of the house in winter regardless of what the glass is doing. It is durable, needs no maintenance and holds a slim profile that suits contemporary houses, and matching entry doors sit under front entry door installation. In a Melbourne winter it is also the frame most likely to run with condensation. Written measurements protect you if a unit arrives wrong.

Thermally broken aluminium solves that at $900 to $1,700 per window. A polyamide strip is set between the inner and outer sections of the frame so heat cannot pass directly through the metal, which cuts frame conduction dramatically while keeping the slim sightlines and zero maintenance. Rylock, Capral and Thermotech all supply thermally broken systems through Victorian fabricators. For most households wanting aluminium in this climate, this is the version worth buying. Acoustic laminate suits properties near arterial roads. Openings are made weathertight the same day they are cut.

uPVC has moved from an unusual import to a mainstream option and performs superbly thermally at $900 to $1,800. The material conducts very little heat, the frames are multi chambered internally, and the European style hardware seals tightly enough to cut draughts noticeably. Seal failure shows up as fogging between the panes. Weep holes must stay clear for frame drainage to work.

Timber remains the best looking option and the only one many heritage overlays will accept, at $1,200 to $2,500 per window. Western red cedar and Victorian ash both feature in Melbourne joinery, and Paarhammer at Bacchus Marsh has built a reputation making high performance timber windows locally. Repainting every seven to ten years is the commitment, and neglected sills on a south facing wall will rot, with joinery repairs under carpentry services. Reveals need making good after any frame replacement. Frame colour is fixed at manufacture rather than site painted.

Composite frames pair a timber interior with an aluminium or fibreglass exterior at $1,400 to $2,800, giving the appearance and warmth of timber inside and a maintenance free skin outside. They are the most expensive option and the most durable in exposed positions. For a coastal or highly weather exposed elevation the premium is easier to justify than it looks on paper. Architraves are usually refitted rather than replaced entirely. Old frames and glass go to a licensed waste facility. Disposal is charged into the job.

Glazing Explained

Glazing terminology gets thrown around in quotes without explanation, and understanding four terms lets you read any window specification properly. None of it is complicated once the jargon is stripped out. Ask the installer to confirm that before ordering. A Victorian window supplier answers this immediately. Powder coat colours are matched from a standard range.

Single glazing is one pane of glass, typically four to six millimetres thick, and it is what sits in most Victorian houses built before about 2005. It insulates almost not at all, which is why a single glazed window feels cold to stand beside on a July evening. Replacing the frame without addressing the glazing leaves the main problem in place. Sill flashing protects the wall below the opening.

Double glazing is two panes separated by a sealed cavity, usually twelve to sixteen millimetres, with the gap filled with dry air or argon. The insulating work is done by the cavity rather than the glass, which is why the gap width matters and why a sealed unit that has lost its seal stops performing. Argon fill improves it modestly over air at a small additional cost. Sarking behind the frame sheds any water that gets past. Desiccant in the spacer bar absorbs residual moisture.

Low emissivity coating is the item that delivers the most performance per dollar and it is invisible. A microscopically thin metallic layer applied to one internal face of the cavity reflects radiant heat back toward its source, keeping warmth inside during winter and rejecting solar heat in summer. Viridian and Guardian both supply low e products through Victorian glaziers. On a heating dominated Melbourne house, a low e coating on the correct surface is worth more than argon fill. Low emissivity coatings cut radiant heat transfer. Setting blocks carry the weight of the glass.

U-value and SHGC are the two numbers that describe a window's performance and both appear on a Window Energy Rating Scheme label. U-value measures heat transfer, where lower is better and a single glazed aluminium window sits around 6.5 while a good double glazed uPVC unit reaches 1.8. SHGC measures how much solar heat passes through, where the ideal figure depends on orientation. Lintel condition matters wherever an opening is widened.

Orientation is why one specification does not suit every window in a house. North facing glass in Melbourne collects useful winter sun, so a higher SHGC is an advantage there provided eaves shade it in summer. West facing glass takes brutal late afternoon summer heat and wants a low SHGC. A supplier specifying identical glass on every elevation is not thinking about your house, and the same applies to tinting under window tinting services. Timber species affects both cost and durability. Old sashes are removed intact where they can be reused.

Is Double Glazing Worth It

This deserves an honest answer rather than a sales pitch, because the case is strong on comfort and considerably weaker on pure payback. Both things are true at once and households deserve to hear both. Check the answer against a second supplier. Glazing beads differ between timber and aluminium systems. Curtains and blinds usually need refitting afterwards.

On energy cost alone, the arithmetic is sobering. Upgrading a whole house from single glazed aluminium to double glazed typically costs $8,000 to $15,000 more than like for like replacement, and the heating and cooling saving in a Melbourne house commonly lands between $300 and $700 a year. That is a payback period well beyond fifteen years, and longer than many households will stay in the property. Ask what they have fitted on comparable houses. Western red cedar remains common in period reproduction work. Tilt in sashes allow cleaning from inside the room.

Comfort is where the argument actually lives and it does not show up on a bill. A double glazed window has an inside surface temperature much closer to room temperature, which removes the cold draught sensation you feel sitting near single glazing on a winter night. Hardware on sliding sashes wears before the frame does. Rollers on large sliding doors are replaceable separately. Edge seal quality determines how long a unit stays clear.

Condensation control is the practical benefit most Melbourne households notice first. Single glazed aluminium sweats through winter mornings across the whole city. Double glazing largely removes that, along with the mould that follows it. It is the change people comment on before they see a bill. Because the inner pane stays warmer, indoor moisture no longer condenses on it, which stops the water pooling on sills and the mould that follows. Households replacing windows specifically to fix persistent winter condensation are usually solving the right problem.

Noise reduction is real but frequently oversold. Standard double glazing with two equal panes reduces noise modestly, and meaningful acoustic performance requires panes of different thicknesses and a wider cavity, which is a specific acoustic specification rather than a side effect. Households on a main road or under a flight path should ask for acoustic glazing by name. Keep a record of what you are told. Seal failure shows as fogging between the panes.

The sensible middle path is to double glaze selectively. Living areas, bedrooms and any room with large glass or a cold aspect deliver most of the comfort benefit, while a laundry or a small toilet window contributes very little. Spending the same money on fewer, better windows usually produces a more comfortable house than spreading it thinly, and detail sits under double glazed window installation. Locking points affect both security and weather sealing. Warm edge spacers reduce condensation at the perimeter.

Retrofit or Full Replacement

Retrofitting means upgrading the glazing while keeping the existing frame, and it is the option most Victorian households have never had explained to them. Where it suits the house it saves thousands and a great deal of disruption. Flyscreen frames are quoted separately on most jobs. Obscure glazing is required in some bathroom positions. Hardwood sills outlast softwood ones considerably. Flyscreen mesh grades differ for insects and pets.

Double glazed retrofit involves removing the existing single pane and fitting a sealed double glazed unit into the same frame, at $350 to $800 per window against $900 or more for full replacement. The frame needs enough rebate depth to take a thicker unit, which many timber frames have and slim aluminium frames often do not. A glazier can tell you in one visit whether your frames qualify. Toughened glass applies near doors and low sills. Orientation determines which figure matters most. North facing glass behaves differently from west.

Secondary glazing is the other retrofit route and it works where nothing else will. A second pane is mounted on a separate frame inside the existing window, creating an insulating cavity without touching the original at all. It costs $250 to $600 per window, and because the original window is untouched it is often the only option acceptable under a heritage overlay. The original window is untouched, which matters under a heritage overlay. Krypton fill appears in slimmer heritage retrofit units.

Retrofit makes most sense on sound timber frames in older Melbourne housing. Victorian, Edwardian and interwar homes frequently have frames in far better condition than their paintwork suggests, since the timber used was denser than anything milled today. Stripping, repairing and reglazing those frames preserves the character that makes the house worth what it is. The timber milled a century ago was denser than anything available now. Lead paint is common on pre 1970 timber frames. Salvaged timber sashes have a secondary market in Melbourne.

Full replacement is the right answer when the frames themselves have failed. Rotten timber, aluminium with failed seals or corroded sliding tracks, and any frame that has racked out of square with ground movement all point that way. Laminated glass improves acoustic performance noticeably. Acoustic rating matters on arterial roads and flight paths. Pane spacing of twelve millimetres is a common standard.

The honest test is to examine the frames before pricing anything. Push a screwdriver gently into the bottom of a timber sill and the outer edge of the frame, since soft timber gives immediately, and check whether sashes still operate and lock. An installer who looks at the frames before quoting is worth more than one who quotes from a photograph, and retrofit options sit under double glazed window retrofit. Retrofit double glazing into sound timber frames costs $350 to $800 per window. Reveal linings need matching to the existing wall thickness. Handle sets are usually selected from a standard range.

Heritage Overlays

Inner Melbourne carries an unusual concentration of heritage overlays and they bind harder on windows than on almost any other element. Households in Fitzroy, Carlton, Richmond, South Melbourne, Albert Park, Williamstown and much of the inner east need to check before ordering anything. Check before ordering rather than after. Ask who carries the cost if it proves otherwise. Insurance cover applies to accidental breakage during work. Ask to see a current certificate.

A heritage overlay is a planning control applied by the local council, and where one applies a planning permit is generally required to alter the appearance of the building from the street. Windows are the element councils scrutinise most closely because they define the character of a period facade. Replacing timber sash windows with aluminium sliders on a street facing elevation will usually be refused. Full frame replacement starts around $900 and climbs with size. Head flashings shed water above every opening.

What overlays typically require is timber frames in a matching profile, the original opening configuration retained, and glazing bar patterns reproduced. A double hung sash window must generally stay a double hung sash window. Sill and reveal details matter as well, since a flush modern frame reads quite differently from a period one with a projecting sill. Sill and reveal details matter as much as the sash pattern. Wider cavities improve acoustic rather than thermal performance.

Rear and non visible elevations are usually treated more leniently, which is where households find room to move. A council frequently accepts modern frames on an elevation not visible from the street while requiring faithful replication at the front. Ask the planning department specifically which elevations are controlled, since assuming the whole house is restricted costs money unnecessarily. Verify it against the product literature. Site protection matters while the openings are out. Trickle vents appear on some imported frame systems.

Secondary glazing is the technique that resolves the tension between heritage compliance and thermal comfort. Because the original window remains entirely in place and the second pane sits inside, the external appearance is unchanged and a permit is frequently unnecessary. Households told they simply cannot improve a heritage window are often being told something untrue. Have the opening measured rather than estimated. Frame systems vary between Victorian fabricators. Brush seals fit into a routed groove on the sash edge.

Check the overlay before you order rather than after. Planning schemes are searchable through vic.gov.au and every council maintains its own mapping, and a phone call to the planning department costs nothing. Windows manufactured to the wrong specification cannot be returned, and enforcement action after the fact is considerably worse than a permit application before it. Timber frames in good order are worth keeping wherever possible. Asymmetric glass thicknesses cut noise transmission further.

Bushfire and Safety Glass

Two regulatory requirements apply to replacement windows in Victoria regardless of anything else, and both exist for good reason. Neither is optional and a competent installer will raise both without being asked. Rot at the sill is the usual reason a frame cannot be saved. Powder coat finishes on aluminium last longer inland than at the coast. Silicone at the perimeter is the last line of defence.

Safety glazing requirements apply wherever glass is at risk of human impact, which covers far more locations than people expect. Glass within a certain distance of floor level, in or beside a door, and in bathrooms or near wet areas must be toughened or laminated rather than ordinary float glass. The rules sit in the glass installation standard published by Standards Australia and add roughly thirty to fifty per cent to the glass cost where they apply. The rules cover far more locations than most people expect. Reveal linings frequently need replacing alongside the frame. Budget for them rather than discovering them later.

Bushfire requirements apply across a great deal of regional Victoria and parts of the outer metropolitan fringe. Properties in a designated bushfire prone area are assigned a bushfire attack level reflecting predicted radiant heat exposure, and window requirements escalate with the rating. Guidance for households is published by the CFA. Window requirements escalate with the assigned rating. Backing rod controls the depth of a sealant joint. Multi point locks spread that pressure along the sash.

At the lower levels the requirements are modest and mostly concern screening and gap sealing. From the middle levels upward, toughened glass becomes mandatory on exposed elevations, screens must be metal with a specified mesh aperture, and frames must be non combustible or bushfire resisting timber. At the highest levels shutters or specialised assemblies are required and costs rise steeply. Marine grade coatings suit properties along the bay. Frame depth limits which sealed units will fit.

The practical consequence is that a bushfire rating can double the cost of a window and eliminate materials you had chosen. uPVC in particular is generally unsuitable at higher ratings, and standard aluminium framing with ordinary glass is not compliant. Establishing the rating before you shop prevents ordering windows that cannot lawfully be installed. Thermally broken aluminium performs far better than standard. uPVC frames insulate well and are ruled out at higher bushfire ratings. Composite frames combine timber inside with aluminium outside. Expansion gaps allow for movement in aluminium frames.

Finding your rating means asking the council whether the property sits in a designated area and, if so, having an assessment done. Many households in the Dandenong Ranges, the Macedon Ranges, the Yarra Valley, the Surf Coast hinterland and the outer eastern fringe are in designated areas without knowing it. Screening requirements interact with this and sit under flyscreen replacement and installation. Many households are in designated areas without knowing it. Making good internally is often a separate trade. Ask who patches plaster and repaints reveals.

Measure to Make Good

Window replacement follows a longer sequence than most people expect and understanding it prevents the common problems. Windows are made to measure, so a mistake at the front of the process is expensive at the back of it. Double glazed units add weight that hardware must carry. Sash windows need balances renewed alongside any glazing work. Packers hold a frame square during fixing. Retractable screens suit doors better than fixed frames.

Quoting should happen on site rather than from photographs. An installer needs to see the wall construction, the condition of the existing frames, how the windows are fixed and what access looks like, none of which a photograph reliably shows. A quote produced without a site visit will carry assumptions that surface later as variations. Casement hardware is more exposed to weather than sliding gear. Slim units exist specifically for period sash retrofit.

Measuring is done by the installer or manufacturer and it is their responsibility rather than yours. Openings are measured individually because no two in an older house are identical, and a house that has moved on reactive clay can vary by twenty millimetres across a single elevation. Never supply your own measurements, since the liability for a window that does not fit follows whoever measured. Awning windows shed rain better than sliders on exposed walls. Fixings must reach solid framing rather than lining board.

Manufacturing takes three to eight weeks depending on material and specification. Standard aluminium is quickest, uPVC and timber take longer, and anything with a bushfire specification or a heritage profile longer still. Order well ahead of any date you need the work finished by, and expect double glazed units to add time over single. Get a second opinion if the answer is vague. Lock and latch specification matters for insurance. Confirm what is fitted as standard on the quoted unit.

Installation day removes the old window and fits the new one, which is quick per opening and disruptive while it happens. Most installers manage three to six windows a day on ground level, so a house is typically two to four days. The house is open to weather at each opening during the changeover, which is why winter scheduling needs a contingency. Window quotes differ most in what they leave out. Reading the exclusions is where the comparison actually happens.

Making good is the stage households forget to budget for and it is where jobs feel unfinished. Removing a frame disturbs plaster inside and render, cladding or brickwork outside, and reinstating that costs $150 to $600 per opening. Establish clearly whether your installer includes it or leaves it, as plaster repairs sit under plastering and gyprock repairs. Fixed panels cost less than any operable equivalent.

Finishing work follows and is worth planning for. New frames need painting where they are timber, existing window furnishings frequently need adjusting or replacing because reveal depths change, and flyscreens are usually a separate order. Coverings sit under blinds and curtains installation. Reveal depths change, so existing furnishings frequently need adjusting. Delivery and storage need planning on a big order. Sash weights survive far longer than the cords holding them.

Victorian Conditions

Four conditions in this state affect window specification and none appears in national product literature. All four are worth raising with an installer before ordering. Larger panes need thicker glass to meet deflection limits. Installation into brick veneer differs from solid masonry.

The heating dominated climate is the first and it shapes the whole glazing decision. Melbourne records substantially more heating degree days than cooling degree days, so the priority is keeping warmth in rather than keeping heat out. That favours a low U-value above all else, and it makes north facing glass an asset in winter rather than a liability. Rendered reveals need patching after any frame change. Level and plumb are checked before any fixing goes in. Reveal depth is confirmed at the measure visit.

Condensation is the second and it is the direct consequence of the first. Cold single glazed surfaces meeting warm moist indoor air produce water on the glass and frame through a Melbourne winter, which collects on sills, soaks into timber and grows mould in the reveals. Improved glazing treats the cause, though ventilation and draught sealing help as well, as covered under window and door draught proofing. Scaffolding applies to upper floor window work. Manufacturer warranties differ from installation warranties.

Reactive clay is the third and it affects the openings rather than the windows. The basalt plains through Melbourne's west and north carry heavy cracking clay, so Werribee, Point Cook, Tarneit, Melton and Sunshine sit on ground that swells and contracts seasonally, along with the corridors around Craigieburn. Houses on that ground move, and window openings rack out of square over years. Waste removal of old frames and glass is charged separately. Operation is tested before the installer leaves site.

What this means in practice is that openings in those suburbs need measuring individually and installing with adequate tolerance and flexible sealant. A frame packed tight into a moving opening will bind, and sashes that stick or fail to lock are usually the symptom. An installer who measures every opening separately is doing the job properly. Lead times on custom sizes run four to eight weeks.

Salt air is the fourth and it applies along Port Phillip, Western Port, the Bellarine and the Surf Coast. Airborne chloride attacks ordinary powder coating and corrodes standard hardware, so coastal properties want marine grade powder coat finishes and stainless hardware. Corrosion appears first at fixings and cut edges. Rinsing frames with fresh water slows the process. Installation crews typically fit several windows in a day. Larger jobs run across a week or more.

Highland frost is worth a brief mention for the Ballarat, Bendigo, Macedon and alpine districts. Overnight temperatures there sit well below Melbourne's, which increases condensation risk on single glazing and strengthens the case for a lower U-value. Households in those districts feel the benefit of good glazing more sharply than anybody in the metropolitan area. Condensation on cold frames encourages mould on reveals. Adjustment of hardware settles most initial complaints.

What Affects the Cost

Frame material sets the starting point, from $500 for standard aluminium through to $2,800 for composite. Within each material the spread reflects size, opening type and glazing rather than brand alone. A large sliding unit costs several times a small awning window in the same material. Thermal breaks reduce that surface chilling considerably.

Glazing specification is the second lever and it moves independently of the frame. Double glazing adds roughly $200 to $500 per window over single, low emissivity coating $50 to $150, argon fill a modest amount, and acoustic or toughened glass more again. Bushfire rated glass at higher levels can exceed the frame cost. Frost loading matters on large fixed panes. Eaves and external shading reduce summer gain considerably. Both work alongside better glazing rather than instead of it.

Opening type affects the price more than most people expect. Fixed panes are cheapest since they need no hardware, awning and casement windows cost more, and double hung sashes with counterbalances cost more again. Glass thickness increases with pane area everywhere. Deflection limits govern what thickness is required.

Access is the item that turns a modest job into a substantial one. Scaffolding at $800 to $2,500 is a setup charge rather than a per window one, so a single upstairs replacement carries all of it. Doing an entire upper floor in one visit spreads that across every window up there. Structural openings need engineering sign off. Measure and quote visits should be free of charge.

Making good and removal follow the installation and are frequently quoted separately. Reinstating plaster, render or cladding runs $150 to $600 per opening, removal and disposal $50 to $150, and lead paint containment on pre 1970 timber frames adds more. Solid masonry walls cost more to reinstate than timber framing. Permits apply where an opening is enlarged.

Regulatory requirements can dominate everything else. A heritage overlay forcing timber in a matched profile, or a bushfire rating requiring toughened glass, metal screens and non combustible frames, will both push a job well above a standard quote. Establish both before you price anything, and structural assessment sits under building inspection. Planning approval precedes any heritage frontage change.

Melbourne and Regional Victorian Pricing

Rates hold reasonably steady across metropolitan Melbourne and the specification explains far more than the postcode does. Wall construction and access account for most of the site variation. Matched profiles are available from specialist joiners. Reproduction sashes cost more than standard units.

Two Melbourne factors explain most of the movement inside those ranges. Inner suburban housing is predominantly solid masonry with heritage controls, which means harder removal, more make good and frequently a mandated timber frame. Growth corridor housing is timber framed with brick veneer and standardised opening sizes, which is faster to work and cheaper per window. Single glazing remains permitted in existing openings.

Regional pricing carries a modest freight and travel component rather than a large one. Windows are manufactured in Melbourne or in regional centres and delivered, and installation is a day or two of labour that a local carpenter or glazier can perform. Energy ratings apply to new residential construction. Retrofit work sits outside those new build requirements. Weather delays affect external work at short notice. Autumn and spring suit this work best.

Bushfire ratings push regional totals up more than distance does. A great deal of Gippsland, the Dandenongs, the Macedon Ranges and the Surf Coast hinterland sits in designated areas, and the glazing, screening and framing requirements at higher levels add substantially. Installers should provide written measurements before ordering. Site measure happens after any demolition work.

Highland and alpine districts see stronger demand for high performance glazing for obvious reasons. Ballarat, Bendigo, Daylesford and the alpine towns run considerably colder than Melbourne overnight, so double glazing is closer to standard than premium there. Local installers in those areas are usually well practised with it. Deposit terms vary considerably between suppliers.

Bundling the whole house into one order is the largest saving available anywhere in this page. Manufacturing setup, delivery, scaffolding and installation crew mobilisation are all shared across the job, and doing four windows now and eight next year costs considerably more than twelve at once. Balance of payment usually falls due on installation. Warranty on sealed units typically runs ten years.

What to Look Out For

Check for a heritage overlay before you order anything. Councils across inner Melbourne apply them widely, a planning permit is generally needed to change street facing windows, and material specified against the overlay cannot be returned. Ringing the council before ordering takes ten minutes and costs nothing. Material specified against an overlay cannot be returned.

Establish your bushfire attack level if the property sits anywhere near bushland. Ratings escalate the glazing, screening and framing requirements sharply, can rule out uPVC entirely, and are not something to discover after the windows arrive. Councils hold the designated area mapping for every property. Get it clarified before the deposit is paid. Glazing suppliers differ in what they stock locally. Pulley wheels are replaceable on most period sashes.

Have the existing frames assessed before accepting that full replacement is necessary. Sound timber frames in older Melbourne housing frequently take a double glazed retrofit for a fraction of replacement cost. Sash cords and balances wear out well before the timber does. Renewing them costs a fraction of a new frame.

Ask whether making good is included and get the answer in writing. Patching and repainting the disturbed wall runs $150 to $600 per opening and is excluded from a great many quotes, which is how two similar looking quotes turn out thousands apart. Putty lines on older glazing perish and let water in. Reputtying is inexpensive and extends the frame's life.

Insist the installer measures every opening themselves. Houses on Melbourne's reactive clay soils move enough that openings vary across a single elevation, and responsibility for a unit that will not fit rests with whoever measured it. Never supply your own figures to save a visit. Openings vary across a single elevation on reactive ground.

Ask for the U-value and SHGC rather than accepting the words energy efficient. Those two numbers are what actually describe performance, they are published on the rating label for every product sold, and a supplier who cannot produce them is not selling on performance. Orientation should change the SHGC across the house. Paint failure on external timber accelerates decay. Repainting on schedule is the cheapest maintenance available.

Get the licensing position and warranty terms in writing before any deposit. Registration requirements are administered by the Building and Plumbing Commission and contract requirements by Consumer Affairs Victoria, with disputes heard at VCAT. Ask separately about the frame warranty and the sealed unit warranty, since they usually differ. Bushfire attack levels govern which frame materials are permitted. Higher ratings rule out several options entirely.

What to Look for in a Quote in VIC

A window quote worth comparing lists every opening individually with its dimensions and type, names the frame material and system, states the glazing specification including any coating, gives the U-value and SHGC, confirms whether making good and disposal are included, states the lead time, and lists what sits outside the price. A single figure for a house of windows compares to nothing. Confirm the detail before manufacturing is booked. Ask what they usually recommend in your suburb. Sealant choice matters on a moving opening. Staff beads are removed to service a double hung window.

Brief every supplier with identical information so the numbers mean something. Provide a list of openings with rough sizes and locations, photographs inside and out, the age and wall construction of the house, whether a heritage overlay or bushfire rating applies, your suburb, and whether upper level access is needed. Say whether you want the whole house or a staged approach. Screens and security grilles are quoted as separate items. Both affect how a window operates day to day.

Four questions separate an installer worth using from a cheap one. Who measures and carries the liability, is making good included, what U-value does this specific product achieve, and what is the lead time from deposit. Clear answers to all four point to somebody who does this regularly. Compare that against what another installer says.

Price two specifications against each other rather than two suppliers of the same one. Thermally broken aluminium with double glazing against standard aluminium with single glazing makes the real decision visible, since the comfort difference is substantial and the payback is long. Where frames are sound, price a retrofit as a third option. Restrictors are required on upper level openable windows. They limit how far a sash can open. Meeting rails are where draughts enter most sash windows.

Budget the whole job rather than the windows alone. Making good, painting, flyscreens, window furnishings and any scaffolding typically add twenty to thirty per cent over the supply and install figure. Posting the job on The Quote Yard puts one brief in front of several Victorian installers, and related work sits under glass repairs and window replacement. Glass replacement in an existing frame costs far less than reframing. Ask whether that option applies to your windows.