Blog

Timber roof trusses on a new Australian house before sheeting
Installing a Roofing Blanket: Step by Step
Roofing blanket goes on in one window, after the structure is up and before the sheets go down. The sequence, the laps, the spacers, the weather, and what to check... Read more...
Steel stud partition framing in an interior fitout before lining
Acoustic vs Thermal Insulation: Why They Are Not the Same Product
Thermal products are specified by R-value. Acoustic products are specified by density to suit a tested system, and the R-value is a by-product. You can reach R2.5 with 90 mm... Read more...
Empty industrial shed interior showing steel portal frames, purlins and roof sheeting
Insulating a Warehouse or Factory Roof: Options and Trade-offs
A warehouse roof is not a big house roof. One enormous volume, wide purlin spacing, everything installed from above before the sheets go on, and every decision multiplied by thousands... Read more...
Two storey timber wall frame with scaffolding on an Australian house under construction
Vapour Permeable Membranes vs Traditional Sarking: Which Wrap Your Wall Needs
A vapour barrier holds moisture out and holds it in. A breather lets the wall dry outward. NCC 2022 sets a minimum permeance class for external walls in zones 4... Read more...
Steel roof structure seen from below, showing beams and purlins
Stopping Insulation Sag Under a Metal Roof: Spacers, Battens and Mesh
Two different failures get called sag: the blanket crushed flat at the purlin, and the blanket drooping between purlins. Different causes, different fixes, and only one of them is solved... Read more...
Timber roof trusses on an Australian house frame against a clear blue sky
Glasswool, Polyester, Rockwool or Phenolic: Which Insulation Material for Which Job
R-value does not choose the material. Two products at the same R-value do the same thermal job, so the decision comes down to handling, fire requirements, available depth, and whether... Read more...
A roof ventilator on a corrugated metal roof against a clear blue sky
Whirlybirds, Solar Vents and Powered Fans: Which Roof Ventilator Actually Works
Every roof ventilator is an extractor, and an extractor needs an inlet. Once the eave vents are sorted, the choice between wind driven, solar, powered and hybrid comes down to... Read more...
Weathered corrugated steel roof sheeting with rust streaks running from the fasteners
Rust, Mould and Wet Insulation: Diagnosing a Sweating Roof
Rust streaks, black spotting, slumped wet batts and stains on dry mornings are four symptoms of one problem. How to tell a leak from condensation, what each symptom means, and... Read more...
Timber roof trusses and stud wall framing on an Australian house under construction
Ceiling, Wall or Underfloor: What R-Value Goes Where
There is no single R-value for a house. The code sets one per element, and what you can reach is capped by depth. Ceilings take a 240 mm batt, a... Read more...
Ribbed green steel roof sheeting against a pale sky
Colorbond Roof Insulation: What Works Under Steel Sheeting
Colorbond is the roof, not the insulation. What belongs under steel sheeting, the R0.2 thermal break rule, what the colour actually does, and why the decision has to be made... Read more...
Aerial view of an established Australian suburb with tiled roofs and rooftop solar panels
Victorian Energy Upgrades Ceiling Insulation: Discount or Rebate, and Who Qualifies
It is a discount, not a rebate. The accredited provider takes it off your quote before you pay. Eligibility, the dates, what it is worth, and the long list of... Read more...
Corrugated metal shed roof sheeting in low light
Why Metal Sheds and Garages Get So Hot, and How to Fix It
A bare metal roof is a radiator. What to put under the sheeting, how thick, what it costs in rolls, and why the same layer also stops the shed dripping... Read more...
Steel roof frame on a construction site seen from below
Ordering Insulation Online: What to Send and What to Expect
Six numbers get an order priced properly. What to send for a take off, how to pick the right product, what a delivery needs, and the ordering mistakes that cost... Read more...
Insulated wall and window opening in a building envelope under construction
R-Value by Australian Climate Zone: How the Number Is Set
Eight climate zones, and no single national R-value. What the zones are, what else changes the requirement besides the zone, and why the neat tables you find online are usually... Read more...
Steel beams and roof framing on a building under construction
Thermal Breaks Explained: the R0.2 Requirement in Plain English
Where metal touches metal, heat runs straight through the frame. NCC 2022 asks for a thermal break of at least R0.2 at those junctions. When it applies, why the number... Read more...
Room under construction showing insulation in the ceiling and walls before plasterboard
Blanket, Sarking or Batts: What Goes Under a Metal Roof
Three products, three positions in the same roof. What each one is for, why sarking adds almost no R-value on its own, and which combination suits a house, a warehouse... Read more...
Ceiling under construction with insulation fitted between the framing before lining
Roofing Blanket R-Values: Which Thickness Suits Your Roof
Thickness sets the R-value in fixed steps, from R1.3 at 55 mm to R3.2 at 130 mm. What decides which one you need, why the label figure is not the... Read more...
Attic room under construction with insulation between the framing and plasterboard ready to fix
How Much Insulation Do I Need? Coverage per Pack Explained
Measure the area, divide by the pack coverage, add for waste. Real coverage figures, a worked example, and the estimating mistakes that leave a job short. Read more...
Empty warehouse interior with an exposed steel roof structure and no ceiling lining
Commercial vs Residential Insulation Specification
Volume One Section J against Volume Two and the Housing Provisions. What changes in the specification, the products, the site sequence and the paperwork. Read more...
Steel truss and purlin roof structure inside a large industrial building
Roof Safety Mesh: When Is It Required in Australia?
Australian law asks you to control the risk of a fall, not to install mesh at a given height. When mesh is the right control, and what AS/NZS 4389 actually... Read more...
Corroded corrugated metal roof sheeting and eaves on an older building
Condensation in Metal Roofs: Why It Happens and How to Design It Out
A metal roof that drips with no rain is not leaking, it is sweating. The mechanism, the warning signs, the NCC 2022 requirements and the detailing that fixes it. Read more...
Timber battens fixed over a reflective insulation layer on a roof under construction
What Is a Roofing Blanket and How Does It Work?
Glasswool plus a foil facing, laid under metal roof sheeting. What a roofing blanket does, how thickness sets the R-value, and where it sits in the roof. Read more...
Steel purlins running across a portal frame roof before the sheeting goes on
Metal Roof Insulation in Australia: What Goes Where
Safety mesh, blanket, spacers, foil, sheeting. The order the layers go in under an Australian metal roof, what each one does, and the detailing that decides whether the roof performs. Read more...