{"product_id":"trade-select-sarking-xr-hd","title":"Trade Select Sarking xR HD","description":"\u003cp\u003eTrade Select Sarking xR HD is the double sided reflective version of Ametalin's heavy duty sarking. Both faces are low emittance, 0.05 on the anti-glare side and 0.03 on the foil side, which is where the extra R-value in the name comes from.\u003c\/p\u003e\n\u003ch3\u003eTwo reflective faces, two air gaps\u003c\/h3\u003e\n\u003cp\u003eA single sided sarking only works against the cavity it faces. With both faces reflective, a roof that has an air space above and below the membrane gets a contribution from each side. Ametalin declare RT 1.14 winter and RT 1.82 summer for an unventilated 22 degree residential roof, against RT 0.93 and RT 1.51 for the standard \u003ca href=\"\/products\/trade-select-sarking-hd\"\u003eSarking HD\u003c\/a\u003e. Battened out lightweight cladding with an R2.7 batt is declared at RT 3.00 winter.\u003c\/p\u003e\n\u003ch3\u003eStill a heavy duty membrane\u003c\/h3\u003e\n\u003cp\u003eTensile strength 12.8 kN\/m machine direction against a 12.5 kN\/m minimum, edge tear 507 N against 80 N, nominal thickness 0.17 mm. Class 2 vapour barrier at 0.02141 µg\/N·s, water barrier and air barrier.\u003c\/p\u003e\n\u003ch3\u003eFire\u003c\/h3\u003e\n\u003cp\u003eFlammability index Low, at or below 5, and compliant with AS 3959-2018 for use in all BALs. Note that at 0.17 mm it is still under the 1 mm limit, but Ametalin do not claim the non-combustible construction concession on this sheet the way they do for Sarking HD, so do not assume it.\u003c\/p\u003e\n\u003ch3\u003eOn site\u003c\/h3\u003e\n\u003cp\u003eBoth faces are reflective, so an installation that presses the membrane flat on both sides throws away most of what you paid for. Batten it out or run it over a spacer. It is electrically conductive, so keep it clear of wiring. Install to AS 4200.2. Full figures are in the table below.\u003c\/p\u003e","brand":"Ametalin","offers":[{"title":"1350 mm x 60 m (81 m²)","offer_id":45385985130678,"sku":"TSHD-XR-81","price":214.0,"currency_code":"AUD","in_stock":true},{"title":"1500 mm x 30 m (45 m²)","offer_id":45385985163446,"sku":"TSHD-XR-45","price":121.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3995\/3590\/files\/Trade-Select-Sarking-xR-HD.jpg?v=1787844637","url":"https:\/\/awbm.com.au\/products\/trade-select-sarking-xr-hd","provider":"AWBM","version":"1.0","type":"link"}