Haventgotaclue Posted February 8, 2021 Share Posted February 8, 2021 So I’m got to lay overboard Wunda UFH. My subfloor is Woden floorboards. Unfortunately the floor drops by 2cm on one side. This is a level drop throughout the room so the floor is all 2cm lower on one side. So, firstly will this matter? If it does what’s the best, easiest, cheapest way of levelling off? hope somebody can help thanks Link to comment Share on other sites More sharing options...
markc Posted February 8, 2021 Share Posted February 8, 2021 Hi, it wont affect the heating but would annoy me to hell. Levelling a wooden floor means over boarding or removal and re-laying. Link to comment Share on other sites More sharing options...
Haventgotaclue Posted February 8, 2021 Author Share Posted February 8, 2021 so the heat will work efficiently with the drop...that’s great news. what would annoy you, the Unilever floor or having rectify it? Thanks for the reply btw Link to comment Share on other sites More sharing options...
Haventgotaclue Posted February 8, 2021 Author Share Posted February 8, 2021 Could I use self levelling compound to level off?? Link to comment Share on other sites More sharing options...
ProDave Posted February 8, 2021 Share Posted February 8, 2021 What insulation is under the floor? Link to comment Share on other sites More sharing options...
TonyT Posted February 8, 2021 Share Posted February 8, 2021 2 hours ago, Haventgotaclue said: Could I use self levelling compound to level off?? Wouldn’t think so, too much movement, likewise why you don’t rule straight onto floorboards maybe if you overlaid with Plywood first Link to comment Share on other sites More sharing options...
Dave Jones Posted February 8, 2021 Share Posted February 8, 2021 take the floor up. firring strips and relay glue and screw. Link to comment Share on other sites More sharing options...
Mr Punter Posted February 8, 2021 Share Posted February 8, 2021 Will it affect doors and skirtings? Link to comment Share on other sites More sharing options...
markc Posted February 8, 2021 Share Posted February 8, 2021 3 hours ago, Haventgotaclue said: so the heat will work efficiently with the drop...that’s great news. what would annoy you, the Unilever floor or having rectify it? Thanks for the reply btw Uneven floors are my pet hate, I can feel the gradient while walking or sitting on a stool etc. Plus rectifying uneven wooden floors is a pain in the A&*E! Link to comment Share on other sites More sharing options...
Dave Jones Posted February 8, 2021 Share Posted February 8, 2021 yes. skirting and architrave would have to come off and be fitted again once the floor is level. Link to comment Share on other sites More sharing options...
ProDave Posted February 8, 2021 Share Posted February 8, 2021 I would want to know WHY they are sloping? Built badly or subsidence? We tried once to buy a small timber bungalow with subsidence like that in one wing. Our short term plan would have been to level the floor (it would not have fixed the wonky walls or ceiling) and let it for a while with the long term plan knock it down and rebuild. Link to comment Share on other sites More sharing options...
Haventgotaclue Posted February 8, 2021 Author Share Posted February 8, 2021 Thanks for all the reply’s everyone. So there isn’t any underfloor insulation. However, I have been assured that the ufh overboard in buying doesn’t loose that much heat downward!!! As for levelling off the 2cm loss...I reckon I will just leave it and plywood over the floorboards and then sick the ufh low profile boards on top. Not sure why there is a 2cm discrepancy...fingers crossed it’s not down to dodgy foundations. I have already taken of the skirts and arcs so that’s not an issue. fingers crossed after reading all the advice I’m making the right choice and it all goes well!!!! cheers Link to comment Share on other sites More sharing options...
ProDave Posted February 8, 2021 Share Posted February 8, 2021 No insulation under the floor, I very much doubt an UFH overlay board system has "enough" insulation. Link to comment Share on other sites More sharing options...
Haventgotaclue Posted February 8, 2021 Author Share Posted February 8, 2021 9 minutes ago, ProDave said: No insulation under the floor, I very much doubt an UFH overlay board system has "enough" insulation. Ouch. Don’t say that.... I asked about that same issue multiple times to the supplier and they reckons it’s designed for it. will the plywood offer any insulation? Other than that it’s asking somebody to spray something to the underside of the floor boards at a later date as I don’t have time to sort it now! Link to comment Share on other sites More sharing options...
Russell griffiths Posted February 8, 2021 Share Posted February 8, 2021 If you have no insulation under it you might as well throw £20 notes on the fire to keep you warm, most of the people selling these overlay systems haven’t got a f###ing clue. Of course they said it will work they want to sell it. You need to rip the whole floor up, find out why it is not level, insulate it properly, air seal it and then put the subfloor back down. If you you don’t want to do this then stick to radiators. Link to comment Share on other sites More sharing options...
Temp Posted February 8, 2021 Share Posted February 8, 2021 +1 We have 80mm of PIR under our UFH and would put in more if building again. Link to comment Share on other sites More sharing options...
Haventgotaclue Posted February 8, 2021 Author Share Posted February 8, 2021 Thanks for that info. With that in kind I might look at a better insulation under the floor. cheers Link to comment Share on other sites More sharing options...
Haventgotaclue Posted February 9, 2021 Author Share Posted February 9, 2021 So I’ve been back in touch with the UFH company to voice my (most people’s concerns regarding downward heat loss). They have reassured me with the system I have bought is designed for no insulation. they have said I can get 75-80w/m2 output with wood finish and 96w/m2 output with tile finish. Reckon I’m happy with that!!! also for any technical people reading this thread, the R-value of the panel is 0.447 (whatever that means ?) cheers for everyone’s help Link to comment Share on other sites More sharing options...
joe90 Posted February 9, 2021 Share Posted February 9, 2021 6 minutes ago, Haventgotaclue said: they have said I can get 75-80w/m2 output with wood finish and 96w/m2 output with tile finish. That may be true, but your going to be paying for the same amount (if not more) to heat the underfloor void which will be colder so more losses. Recently a mate of mine bought a bungalow and the whole floor area was riddled with woodworm, we ripped the lot up, levelled the joists and replaced those too far gone, installed 100mm insulation between joists and new chipboard flooring. Sorts your sloping floor, insulates and saves you money for all those years that you are going to live there. You only buy insulation once, fuel, you keep paying for! Link to comment Share on other sites More sharing options...
ProDave Posted February 9, 2021 Share Posted February 9, 2021 How thick is this panel? UFH will of course elevate the floor temperature, so any heat loss through the floor will be greater than the same room heated with radiators where the floor would remain cool. so it is important to insulate a floor well for UFH. Yes it will "work" but how much of the heat that you put in will end up in the room, and how much will heat the under floor space and the outside? One member on here worked out that even with 300mm of floor insulation, he still lost 8% of the heat put in down into the ground. I personally think the company is being reckless to make the claims they are, I would take up all the floor boards, string a netting (netlon) across the bottom of the joists and lay rockwool type insulation between all the joists, put the boards back and put your UFH system on top. Link to comment Share on other sites More sharing options...
Haventgotaclue Posted February 9, 2021 Author Share Posted February 9, 2021 Ok. That doesn’t sound like too big a job. Not sure what conditions the rates were gathered from but they stated that an independent UCAS test was carried out on the panels and that’s what they are working from. I guess belt and braces won’t hurt thanks Link to comment Share on other sites More sharing options...
Haventgotaclue Posted February 9, 2021 Author Share Posted February 9, 2021 So I’ve just been reading about this and there are sites 10 hours ago, ProDave said: I would take up all the floor boards, string a netting (netlon) across the bottom of the joists and lay rockwool type insulation between all the joists, put the boards back and put your UFH system on top. Do I need a vapour control layer above the joists? A lot of sites suggest this with a vapour permeable membrane below joists. I will be working the the void so the control layer will be somewhat impossible. thanks Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now