Roofing & insulation supplies — Melbourne
Trade Insights
Spec guides, compliance notes and on-site trade advice from PREZO's Melbourne team — helping builders, roofers and estimators get commercial roofing packages right the first time.
Spec guides
Practical selection advice for sarking, insulation, rainwater and fasteners — written for estimators and site supervisors.
Compliance
BAL ratings, NCC Section J and AS/NZS context for Victorian commercial builds — what certifiers expect on file.
Commercial programs
Pack lots, staged delivery and supply coordination for multi-building roofing programs across Melbourne and Victoria.
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Featured · Product Guides
PREZO Wrap is a PREZO-branded reflective sarking line designed to sit cleanly in commercial roof packages alongside partner insulation — one supplier, clear specification support.
Commercial ProgramsNot every job needs a staged delivery program, and not every program should run through trade counter pickups. Here's how to match supply model to job size.
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Spec GuidesMelbourne's temperature swings make metal roof condensation a near-guaranteed issue without the right combination of foil facing and roof ventilation.
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Trade TipsA faster, more accurate roofing pack quote starts with the take-off information you send us. Here's exactly what to include so we're not chasing details back and forth.
Read moreComplianceFlammability index ≤5 sarking is mandatory in specific BAL and commercial fire-spec scenarios — not a universal upgrade. Here's how to tell which jobs actually need it.
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Spec GuidesNot every internal wall needs the same acoustic batt. Matching batt density to the actual Rw requirement avoids both underperformance and unnecessary cost.
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Trade TipsThe vapour barrier isn't the membrane alone — it's the membrane plus every lap and penetration seal. Foil tape selection and application detail decide whether it holds.
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Spec GuidesZero-running-cost wind-driven vents work well until heat load or still-air days expose their limits. Here's when to add or switch to powered ventilation on commercial roofs.
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Product Guides100×50 is the commercial default for good reason, but roof catchment area, offset count and colour matching to cladding all affect whether it's actually the right call.
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Product Guides40mm TRUECORE battens are a common commercial spec, but BMT, span and insulation pack coordination determine whether the number on the drawing actually works on site.
Read moreTrade TipsThe roofing sheet is rarely what delays a program — a missing barge, ridge or apron flashing is. Here's the order checklist that avoids the second trip.
Read moreProduct GuidesConcealed-fix systems cost more per square metre but solve problems pierce-fix profiles can't on low pitch, long-run and architectural commercial roofs.
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Spec GuidesThermal-only duct wrap and acoustic-rated lagging solve different problems on plant rooms and mechanical risers — mixing them up costs more than the wrap itself.
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Product GuidesBoth control condensation drip and radiant heat in steel buildings, but they perform, cost and install very differently. Here's how to choose between shed blanket and air-cell insulation.
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Spec GuidesSuspended floors over unconditioned space lose comfort and energy performance fast without the right underfloor system. Here's how batts, foilboard and reflective systems compare.
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Product GuidesLight residential wall wrap doesn't survive extended exposure on a staged commercial program. Here's when to step up to heavy duty and what it actually buys you.
Read moreSpec GuidesThey look similar on a pallet and get confused on smaller sites — but wall wrap and roof sarking are engineered for different loads, orientations and vapour behaviour.
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ComplianceFall-through protection under the sheet is not optional on most commercial roof programs. Here's what AS/NZS 4389 actually requires and how mesh integrates with insulation.
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Spec GuidesA compressed roofing blanket under the sheet loses R-value long before you notice on site. Spacer systems recover full loft — here's when they earn their place in the spec.
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Product GuidesR1.3 to R4.2 covers a wide range of commercial and residential metal roof jobs. Here's how to pick the right ThermaRoof blanket for climate zone, ceiling type and budget.
Read moreSpec GuidesMetal and tiled roofs behave differently under Victorian weather. This guide explains which sarking type suits each build, how condensation risk changes, and what to specify on commercial programs.
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ComplianceBushfire Attack Level requirements affect more than cladding. Learn how BAL-rated roof blankets, sarking and insulation products fit Victorian builds — and what documentation your certifier will expect.
Read moreCommercial ProgramsA complete commercial roof package is more than sheets and screws. Here is how experienced builders structure pack lots for insulation, sarking, flashings, fasteners and rainwater — with fewer site delays.
Read moreProduct GuidesBoth are BlueScope staples — but they solve different problems. Compare durability, aesthetics, cost and warranty considerations for Victorian commercial and industrial roofing.
Read moreTrade TipsUndersized vents, sealed eaves and confused exhaust paths cause condensation and heat build-up in Victorian warehouses. These are the errors we see most — and the fixes that work.
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Product GuidesReflective sarking R-values depend on the whole roof assembly, not the roll label alone. How PREZO Wrap contributes to thermal performance on commercial metal roofs in Victoria.
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Spec GuidesUndersized gutters cause overflow on Melbourne's intense rainfall days. Learn how to size commercial gutters, sumps and downpipes — and coordinate them with your roof package.
Read moreCommercial ProgramsMulti-building sites need more than one truck drop. How PREZO structures staged roofing supply against crane lifts, install sequence and site storage on Victorian commercial projects.
Read moreSpec GuidesNCC compliance and condensation risk depend on putting insulation in the right layer. A practical guide for Victorian commercial builds with metal decks, suspended ceilings and open roof spaces.
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Trade TipsWrong screw length, drill point or washer colour causes pull-out failures and warranty issues. How to specify roof fasteners for commercial profiles on Victorian builds.
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Our trade team specs commercial pack lots every week — send plans or a bill of quantities and we will come back with aligned quantities and delivery options.