{"title":"Underfloor Insulation","description":"\u003cp\u003eUnderfloor batts, rolls, fixings and subfloor ventilation.\u003c\/p\u003e","products":[{"product_id":"r2-5-martini-polyester-acoustic-floor-blanket","title":"R2.5 Martini Polyester Acoustic Floor Blanket","description":"\u003cp\u003eR2.5 Martini polyester acoustic floor blanket, supplied as a 10 m roll, 430 mm wide and 140 mm thick, covering 8.6 m².\u003c\/p\u003e\n\u003ch3\u003eMade for the space between floor joists\u003c\/h3\u003e\n\u003cp\u003eThe 430 mm width and the roll format are the point. It runs out along a joist bay rather than being cut batt by batt, which suits midfloor and suspended floor work where the bays are long and consistent. At 140 mm it fills a deep joist cavity.\u003c\/p\u003e\n\u003ch3\u003ePolyester, so no itch\u003c\/h3\u003e\n\u003cp\u003eUnderfloor and midfloor work often means working overhead in a confined space. Polyester does not itch and does not need the full covered-up kit, which is a real difference when you are on your back between joists.\u003c\/p\u003e\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cp\u003eTwo things at once: it cuts noise carrying between the floor above and the space below, and it carries an R2.5 thermal figure for the floor. Thermal rating is declared to AS\/NZS 4859.1 by the manufacturer.\u003c\/p\u003e\n\u003ch3\u003eA note on acoustic figures\u003c\/h3\u003e\n\u003cp\u003eThe Rw or Ln,w of a floor belongs to the whole build-up, including the flooring, the underlay and the ceiling below. Tell us the system and we will send the report that matches it.\u003c\/p\u003e\n\u003cp\u003eRoll size, coverage and the CSR product code are in the table below.\u003c\/p\u003e","brand":"CSR Bradford","offers":[{"title":"R2.5, 10 m x 430 mm x 140 mm (8.6 m²)","offer_id":45351440384182,"sku":"127824","price":188.1,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3995\/3590\/files\/r2-5-martini-polyester-acoustic-floor-blanket.jpg?v=1786564803"},{"product_id":"bradford-optimo-sub-floor-fixings","title":"Bradford Optimo Sub-Floor Fixings","description":"\u003cp\u003eBradford Optimo sub-floor fixings hold underfloor batts in place. Saddles for R2.5 at 70 x 45.2 mm and straps at 190 x 20 mm, both 250 per pack.\u003c\/p\u003e\n\u003ch3\u003eUnderfloor insulation is the one working against gravity\u003c\/h3\u003e\n\u003cp\u003eA wall or ceiling batt is supported by the structure around it. A floor batt is not. Friction fit gets it in position on the day, but over years, with vibration and airflow beneath, unsupported batts sag and eventually drop. A sagging batt is not delivering its R-value, and nobody notices because it is out of sight.\u003c\/p\u003e\n\u003ch3\u003eSaddles or straps\u003c\/h3\u003e\n\u003cp\u003eSaddles push up into the joist bay from below to hold the batt against the floor. Straps run across the underside. Which you use depends on joist spacing and access, and both fix with standard fasteners.\u003c\/p\u003e\n\u003cp\u003eOrder these with \u003ca href=\"\/products\/r2-5-bradford-optimo-underfloor-batts-90mm\"\u003eOptimo underfloor batts\u003c\/a\u003e rather than as an afterthought. Pack sizes and CSR product codes are in the table below.\u003c\/p\u003e","brand":"CSR Bradford","offers":[{"title":"Saddle R2.5 250 per pack, 70 x 45.2 mm","offer_id":45351446905014,"sku":"96262","price":251.75,"currency_code":"AUD","in_stock":true},{"title":"Strap 250 per pack, 190 x 20 mm","offer_id":45351446937782,"sku":"95295","price":227.05,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3995\/3590\/files\/bradford-optimo-sub-floor-fixings.jpg?v=1786564760"},{"product_id":"bradford-ecofan-v2-underfloor-ventilation-fan-250mm","title":"Bradford EcoFan V2 Underfloor Ventilation Fan 250mm","description":"\u003cp\u003eBradford EcoFan V2 is a 250 mm sub-floor ventilation fan for damp and mould control, available in brown or white, singly or as a twin pack.\u003c\/p\u003e\n\u003ch3\u003eSub-floor damp is an airflow problem\u003c\/h3\u003e\n\u003cp\u003eA closed sub-floor holds moist air against the underside of the floor, and that is where mould, musty smells and rot in the bearers start. Moving that air out is the fix, and it is usually cheaper and more permanent than treating the symptoms upstairs.\u003c\/p\u003e\n\u003ch3\u003eCapacity and control\u003c\/h3\u003e\n\u003cp\u003eThe 24 V DC EC motor is variable speed and moves up to 734 m³\/hr. Air iQ senses heat and humidity and adjusts automatically, so it runs when the sub-floor is actually damp rather than continuously.\u003c\/p\u003e\n\u003ch3\u003eWhy the twin pack exists\u003c\/h3\u003e\n\u003cp\u003eVentilation needs a path. Two fans placed to pull air across the sub-floor rather than one fan pulling from a single point is usually the better result, which is why they are stocked in pairs.\u003c\/p\u003e\n\u003cp\u003eTough UV stable polymer housing. Options and CSR product codes are in the table below.\u003c\/p\u003e","brand":"CSR Bradford","offers":[{"title":"Brown","offer_id":45351462830262,"sku":"112157","price":507.3,"currency_code":"AUD","in_stock":true},{"title":"Twin Pack Brown","offer_id":45351462863030,"sku":"134203","price":913.9,"currency_code":"AUD","in_stock":true},{"title":"Twin Pack White","offer_id":45351462895798,"sku":"134204","price":913.9,"currency_code":"AUD","in_stock":true},{"title":"White","offer_id":45351462928566,"sku":"112158","price":507.3,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3995\/3590\/files\/bradford-ecofan-v2-underfloor-ventilation-fan-250mm.jpg?v=1786564760"},{"product_id":"r2-5-bradford-optimo-underfloor-batts-90mm","title":"R2.5 Bradford Optimo Underfloor Batts 90mm","description":"\u003cp\u003eR2.5 Bradford Optimo is a dense glasswool batt made specifically for suspended timber floors, at 90 mm.\u003c\/p\u003e\n\u003ch3\u003eSized narrower on purpose\u003c\/h3\u003e\n\u003cp\u003eThe two widths are 415 mm and 565 mm rather than the 430 and 580 of a wall batt. Floor joists are set out at the same nominal centres, but the batt has to sit up between them and stay there, so the fit is tuned differently. Eight batts per pack, covering 3.85 m² and 5.24 m² respectively.\u003c\/p\u003e\n\u003ch3\u003eWhat it does under a floor\u003c\/h3\u003e\n\u003cp\u003eThree things. It cuts heat loss down through the floor. It limits cold air moving up from the sub-floor, which is what people actually feel as a cold floor. And the density gives some acoustic benefit through the floor structure.\u003c\/p\u003e\n\u003ch3\u003eIt needs holding up\u003c\/h3\u003e\n\u003cp\u003eA floor batt is working against gravity, unlike a wall or ceiling batt. Friction fit gets it in place, but Optimo Saddles or Straps are what keep it there over time. Order the fixings with the batts rather than discovering the need later, and see \u003ca href=\"\/products\/bradford-optimo-sub-floor-fixings\"\u003eOptimo sub-floor fixings\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThermal rating declared to AS\/NZS 4859.1 by the manufacturer. Sizes and CSR product codes are in the table below.\u003c\/p\u003e","brand":"CSR Bradford","offers":[{"title":"1160 x 415 mm (8 per pack, 3.85 m²)","offer_id":45351821246646,"sku":"114650","price":61.75,"currency_code":"AUD","in_stock":true},{"title":"1160 x 565 mm (8 per pack, 5.24 m²)","offer_id":45351821279414,"sku":"114692","price":81.7,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3995\/3590\/files\/r2-5-bradford-optimo-underfloor-batts.jpg?v=1786564869"}],"url":"https:\/\/awbm.com.au\/collections\/underfloor-insulation.oembed","provider":"AWBM","version":"1.0","type":"link"}