Browse Forums Heating, Cooling & Insulation 1 Nov 05, 2023 3:15 pm Hey all, I'm looking to insulate the underfloor of my home. The house was built in the 1950's and the floor joists were installed with ~455mm spacing. Ideally I'd like to use polyester rolls to insulate and from what I have found most come in 450mm width to accommodate normal 430mm floor joist spacing. Has anybody found a polyester product that suits wider spaces? If anybody has any other insulation solutions for wider floor joist spacing I'd love to hear it! Thanks! Re: Underfloor insulation for wider floor joist spacig 2Nov 06, 2023 5:10 pm Try foil board Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog yes building is covering the external wall with warping before bricks 2 2632 Assuming you've modelled the TB8, TB10, TB12, TB2 & J1 joists/LVLs there, it appears as per drawing to me. There maybe should be an additional J1 between TB10 and T12 if… 3 32197 Seconded; we just used these last weekend to build a small deck. They worked perfectly as we have bluestone in the area where we wanted to build so digging down was not… 8 9302 |