joists

i noticed when removing some subfloor that the builders placed a 4 1/4" hole for a toilet waste pipe in 2 floor joists on the second floor. the joists are 2x10 and the span is 27'. the bottom of the hole is 1" from the bottom of the joist. i have been asked to tile the floor of this room with...

Hi, I'm new to the forum (and tiling / bathrooms) and appreciate the many threads that I have been learning from. If anyone had a moment to comment on the tanking and drain plan for my new attic wetroom I would be very grateful. I'm doing all the work myself, learning as I go. I'm most...

We have a 4x3 bedroom with the following 12 spans: 190, 368, 380, 365, 380, 370, 385, 370, 395, 385, 370, 300 The UFH was installed by builders ready for the GifaFloor FHB18 (18mm). FHB18 is rated at 2kn point load when installed to manufacturers instructions, they estimate to reduce that by...

Wet UFH in screed, between joists covered with ply. Is this a thing? I got a call the other day from a builder describing the above. He wants it tiled asap. I wont go and see it until the ply is down plus its a 40 mile round trip to the house. English is not his first language and it was...

I would like to Tile my hallway and need to minimise the impact this will have on the finished floor level, to provide a smooth transition to an adjoining room. Do you think it would be acceptable for me to do the following: - Remove and discard the existing floorboards. Fix 70mm X 20mm...

Just a quick one guys, a job in the pipeline, I've been asked about the prep that will be required, here's the scenario.. 70m total area ish New extension with new screed (50 - 60mm) and ufh. Existing building with joists, the floor boards are coming up and the ufh is being fitted between...

Hi all, After a bit of advice on subfloor build up if those in the know could help out? Am in the process of renovating my bathroom in my Victorian terrace - approx 8m2, floorboards have been lifted for fist fix plumbing (not re fixing as they're in a state) My thoughts on subfloor for...

Hi all Just looked at a job where builder wants to put down 22m chipboard over joists then Ditra. I said nooooo. The heating system is wet on a polystyrene board with aluminium trays screwed to joists. I have mentioned giffa flooring. The joists are 400 centres so could probably use the 18mm...

Hi, First time here and hoping this is an easy question! I am installing a wet room upstairs and going back to joists but I also want to install low profile wet underfloor heating (I already have it), what will give me the best surface to tile on and support a bath on top? So I was planning...

Apologies this is so long winded, but hopefully you're an understanding bunch & you'll stick with the novel and provide a straight opinion on this. I'm a competent DIY'er (ex-spark), but it's a while since I've done any DIY tiling at home. I'm now re-doing the kitchen floor/walls in a 1960’s...

I need to quote for a job, as the title says........over wet UFH between joists. Much the same as the link I've put up. Insulation, fitted between joists.....pipes laid, maybe with or without spreader plates. (Not sure as yet which way customer is doing this) then the floor would be overlaid...

Hi all, been browsing through the forum trying to find a definitive answer. I'm in the process of qouting for a 33m2 floor. The floor is not ready yet, but it will be 22mm wbp plywood primed on all surface and then down directly on to the joists, noggins will be added and bricks built up under...

Hi. We are tiling a ground floor kitchen that is half suspended floor (100x50 joists on 300 spacing, with supports every 1200mm) and half concrete slab. The concrete slab has just been poured and once insulation has been added, it will have UFH pipes buried in the screed top layer. The tiles to...

Happy New Year everyone! Just wanted to check the feasibility on a shower room floor prep. A customer has asked me to tile (walls & floor) in an ensuite shower room. She is quite uneasy on her feet so wants the transition between the bedroom carpet & the ensuite tiled floor to be as level as...

Hi everyone, We've an existing kitchen floor on Block & Beam + starting an adjoining extension with wooden joists. (has to be due to slope) We are wanting 'Wet UFH' across both surfaces finished off with tiles but only have a maximum height on top of block & beam of 80mm (including tiles), is...

Existing floor covering is 18mm T&G floorboards. If you had to replace some floor joists, and to re level some floor joists, would you: 1. bin all the floorboards that have to get removed to fix the floor. replace the floorboards with 25mm wbp ply and tile directly onto that. or 2. bin all...

Hello, we've just bought a new house, the current ground floor is concrete and I'm thinking about installing under-floor-heating. I don't want to screed as the reception room areas are too large, (16 2m each of 2) so I was thinking of putting down a DPM with 4x2 sawn battens (at 400mm...

We are doing wet UFH on suspended floors with very strong timber joists (9 x 3in at approx. 400mm centres, max span 4.8m). We are setting the pipes between the joists on a 45mm thick PIR base and pug mix (8:1 sharp sand: cement) between and around the pipes, as commonly used. I understand the...

I'm intending to tile a kitchen diner floor, 1/3 of which is concrete but the other 1/3 a suspended timber floor on 4 inch joists. I'm aware that such joists have a propensity for deflection/bounce, which I need to remove. My intended plan of action is to remove all the floorboards and replace...

Hi there, fantastic forum by the way guys! I've just had a large kitchen/diner extension built. It is made up of three parts 1) The original Edwardian house with suspended wooden floor 2) An extension built about 7 years ago with solid floor 3) Extension built now with suspended timber...