{"product_id":"rhino-metal-roofing-rp-51mr","title":"Rhino Metal Roofing RP-51MR Heavy Duty Reflective Roof Sarking","description":"\u003cp\u003eRhino Metal Roofing RP-51MR is a heavy duty reflective roof sarking made by Thor Building Products for residential and commercial metal roofs. The foil is bonded to a reinforcing polymer mesh coloured blue to cut glare while it goes on.\u003c\/p\u003e\n\u003ch3\u003eStrength and fire\u003c\/h3\u003e\n\u003cp\u003eThor rate it heavy duty: tensile strength at least 12.5 kN\/m along the roll and 7.5 kN\/m across, edge tear at least 80 N both ways. The flammability index is Low, below 5 to AS 1530.2. It suits BAL 12.5 to FZ under AS 3959 section 3.10, except exposed installations in fire control rooms or fire-isolated exits.\u003c\/p\u003e\n\u003ch3\u003eA vapour barrier, so ventilate in the cold\u003c\/h3\u003e\n\u003cp\u003eThis is a Class 2 Vapour Barrier at 0.011 µg\/N.s. Where daytime temperatures fall below 5 °C, Thor say the roof must be well ventilated and moist air from the house exhausted outside. Our article on \u003ca href=\"\/blogs\/blog\/metal-roof-condensation-australia\"\u003emetal roof condensation\u003c\/a\u003e explains why.\u003c\/p\u003e\n\u003ch3\u003eWhat it adds thermally\u003c\/h3\u003e\n\u003cp\u003eThe data sheet says up to R1.3 may be added to the insulation system in a roof. No roof build-up is given, so read it as an upper limit, not a rating for the foil. Thor recommend at least 20 mm of air space next to the foil face.\u003c\/p\u003e\n\u003ch3\u003eOrdering and site notes\u003c\/h3\u003e\n\u003cp\u003eBoth rolls are 1350 mm wide: 30 m covers 40.5 m², 60 m covers 81 m². Install to AS\/NZS 4200.2 with 40 mm of sag between trusses and expect up to 2% shrinkage. Sheet the roof as soon as possible and keep the rolls dry. Full figures are in the table below.\u003c\/p\u003e","brand":"Rhino","offers":[{"title":"1350 mm x 30 m (40.5 m²)","offer_id":67636084703414,"sku":"RP-51MR-30","price":71.0,"currency_code":"AUD","in_stock":true},{"title":"1350 mm x 60 m (81 m²)","offer_id":45343873695926,"sku":"RP-51MR-60","price":138.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3995\/3590\/files\/RP-51MR-Open-Roll.jpg?v=1786182783","url":"https:\/\/awbm.com.au\/products\/rhino-metal-roofing-rp-51mr","provider":"AWBM","version":"1.0","type":"link"}