Typically, the frames have an extra polymer protective coating to minimise rust, which improves durability. Steel-framed construction began to be adopted in the 1940s and continues to be popular especially in areas of high termite risk.Timber is vulnerable to termite attack, and rot and mould from condensation are also becoming a threat as we seal our homes and increase insulation levels. Certification schemes for sustainability include Programme for the Endorsement of Forest Certification (PEFC) or Forest Stewardship Council certification (FSC). Timber from approved sustainable sources provides a renewable building material that takes in carbon from the atmosphere while growing and stores it for the life of the building.The 2 most commonly used framing materials – timber and steel – can be made into comfortable and appealing homes with good environmental performance: The lightweight house is particularly suited to creating cost-effective, flexible design solutions for challenging sites and reactive soils. Framed structures lend themselves to the creation of houses with diverse window and door openings for passive solar heating, natural light and ventilation. Lightweight floor frames can support internal and external wall, floor, and roof loads on low-impact footing systems. Lightweight houses are well suited to above-ground construction to minimise site disruption. Framing systems can be varied to suit almost any design or construction system, provided engineering certification is obtained. Lightweight framed construction is the most common construction system used in Australia. A lightweight frame is like a skeleton to which exterior wall claddings, internal linings, flooring, roofing, windows and doors are attached.
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