subfloor

hi, I'm trying to find out what the minimum sensible thickness of plywood i can use to lay over our joists. Its an old house and the joists centres vary from 380 - 400 (most less than 400). The joists are 45mm x 160mm, and there are noggins dotted around the place. Most joists are pretty stable...

I know this sounds familiar, but have read the posts and find the info I need, so any advice appreciated. So from top to bottom I was thinking (for garden studio); - 225mm x 38mm wooden floor boards - (maybe VCL or foil tape joins in celotex sheets) - celotex - concrete floor Will the floor...

I'm building a 4.8m x 2.8m (ideally) garden room and need some advice on the base / subfloor and possibility of overhang on the floor joists. As you can see in the image, I've got a concrete slab (not insulated) that I was going to sit the 3x2 treated joists directly on with DPC underneath each...

Hi, I'm renovating an old 2 up 2 down terrace house and need to replace the downstairs timber floor. An old extension on the back blocked the rear bricks (this is going to be replaced) and as such under the floor the mud is damp and wet causing the old floorboards and joists to rot. A builder...

Hi, I am renovating a bungalow and am in process of doing the kitchen. I am going to lay Wickes laminate flooring and I want to know if I need to put plywood down first? The current floor is wood planks and is v level and my kitchen fitter said I didnt need ply but the guy in Wickes said it...

I have a wet underfloor heating system installed between joists in a 1930's house. The heating system itself works. The issue is with the subfloor.... The builder installed insulation between the joists, then clipped the pipes to the insulation as seems to be the standard approach. He then...

Hi there, We have a 1900 Victorian terrace whereby the floorboards are not in good condition (we sanded them when we moved in and they are structurely sound) but a mixture of 1900/1950 and a few chop outs from previous owners etc. We like the exposed flooring and therefore would either like to...

I know this gets asked a lot but I couldn't find a thread discussing the exact points I'm confused about. I'm refurbing a small (1.4 x 2.4m) shower room. The fitter has proposed the following for the subfloor: - 18mm moisture resistant chipboard screwed to the joists at 250mm centres, with...

Hi. Renovating a single room extension (c1980s I believe) attached to a c1800 stone house. I intend to install a laminate floor, and because of some undulations need to level the existing base. When lifting carpet grippers (tacked down but also glued in places) parts of the floor lifted with...

Hi, I'm prepping for my new Karndean floor and in the past my fitter has used 6mm marine ply as a subfloor. But as my lounge is now about 4 times as big as the last project I'm wondering if I can use exterior grade ply instead? This seems a lot more affordable. The description says it is...

I'm in the process of prep'ing a concrete sub floor. I just want to make sure I've done everything correctly before the self levelling. The concrete has quite a few cracks in it, which are also high points. So I've been grinding these down which has opened them up a bit and they will now need...

Hi, I'm planning to install 500 x 70 x 20mm oak parquet (brick pattern) in a room with partial concrete and partial suspended timber subfloors (25mm WBP plywood). The old concrete has terrazzo tiles installed which are firmly in place but there is no DPM below the concrete. There is also a new...