The Casey trades that work alongside a window replacement.

A window replacement looks self-contained until you start pulling the old frame out. Suddenly the architrave needs patching, the reveal needs sealing, the paint line is broken, and if you’re upgrading to double glazing the whole envelope story comes into play. Here are the trades we coordinate with most often on Casey jobs.

Double glazing & IGU specialists.

Many Berwick homes from the 1990s and early 2000s have aluminium frames that will accept a retrofit IGU — swapping the single pane out for a double-glazed unit while keeping the frame in place. The team at Double Glazing Southeast handle that specialist retrofit work across the Casey corridor. They’ll assess whether the existing frame can take the extra weight (about 2.5x a single pane), check the seals and hinges, and quote a glass-only upgrade where it makes sense. For frames that can’t accept the retrofit, we replace the whole window instead. Sharing the assessment between both trades means owners get the cheaper option when it’s viable, instead of being upsold to full replacement automatically.

Garage doors & shared safety glazing.

A garage door isn’t a window trade — but in bushfire attack zones (BAL-12.5 or higher across parts of Berwick-Beaconsfield, Endeavour Hills foothills) the garage door panels, side glazing and any internal access door have to share the same BAL compliance as the windows. When owners replace both at once we coordinate with cranbournegaragedoorco.com.au so the BAL certificates align across the whole envelope. They also do the side-panel safety glass (Grade A toughened to AS 2208) that sits beside sectional garage doors — same standard as the windows we install. One supplier, one certificate, one paperwork bundle — cleaner for the owner and the building surveyor at sign-off.

House painters & trim repaint.

Every window replacement damages the surrounding paint line. The architrave gets pried, the reveal needs new sealant, the flange of the new frame doesn’t sit identically to the old one. We do basic make-good (sand, prime, sealant) on the immediate reveal but for a clean finish across the whole architrave and adjoining wall the painter has to come back. Local painters in Pakenham handle the post-install trim repaint on a lot of our jobs — they prep the disturbed sections, blend into the existing wall colour, and roll a fresh coat over the touched areas. Booking the painter for two days after our install gives the sealant time to cure properly before paint goes over it. Skip this step and you see the patch line for years.

Plasterer & reveal repair.

On older Berwick homes with plaster reveals (rather than aluminium-clad reveals on modern builds) the plasterer comes in between us and the painter. Removing an old timber-framed window often takes a chunk of the plaster reveal with it, especially if the original install used hard nail-fixings straight through the lining. The plasterer patches with fibreglass mesh and a base coat, two skim coats over the top, then the painter takes over. Adds a day to the project but gives a flat finish.

Building surveyor (for non-like-for-like).

A like-for-like window swap is permit-exempt. Changing the opening size, adding a window, converting a sliding door to French doors, or installing in a heritage overlay zone all require a private building surveyor to issue a permit. We engage one on jobs that need it — same surveyor we use for the carport and decking trades, so the paperwork flows through one office.

Windows sit at the intersection of energy, safety, bushfire and heritage codes. These are the references owners ask about most, and the standards we install to on every job regardless of who quoted the cheapest.

• City of Casey — building permits, heritage overlay maps for Berwick Village, planning permits for non-like-for-like changes. casey.vic.gov.au
• AS 2047 — Windows in buildings — the install standard. Specifies water-penetration resistance, air-infiltration limits, structural wind loading and operating force tests. Every window we install carries an AS 2047 compliance label. Standards Australia
• AS 1288 — Glass in buildings — the standard for glass thickness, safety-glazing locations, and human-impact protection. Anything within 500mm of the floor in a habitable room must be Grade A toughened or laminated. Standards Australia
• AS 3959 — Construction in bushfire-prone areas — the standard that drives BAL ratings. Parts of Berwick (foothill blocks) sit at BAL-12.5 or BAL-19. Windows in those zones need specific glazing, screens and frame ratings. Check your block’s BAL via the CFA map before quoting. CFA — BAL ratings
• NCC Volume 2 — Energy efficiency — sets minimum U-values and SHGC (Solar Heat Gain Coefficient) for new windows in major renovations. Casey sits in Climate Zone 6, where double glazing is the practical baseline. ncc.abcb.gov.au
• Victorian Building Authority (VBA) — registered builder lookup. Any window job over $10K must be done by a registered builder. Verify before paying a deposit. vba.vic.gov.au

The trade ecosystem is half the picture — the actual glazing, frame and operating-type choice is the other half. These pages cover the options we install most often on Casey jobs.

• Aluminium windows — powder-coated, double-glazed, AS 2047 compliant
• Timber windows — cedar, meranti, heritage-style
• Sliding doors — aluminium and timber, double-track and triple-track
• Bifold doors — for indoor-outdoor flow
• Awning windows — secondary glazing and ventilation
• Berwick window replacement — primary service area
• All City of Casey — Cranbourne, Narre Warren, Endeavour Hills, Hampton Park