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Post by DIYDafty on Jun 6, 2019 20:47:29 GMT
Anyone know much about it? Especially for suspended floor (i.e. joists) type of thing? It seems to be very expensive if you pay for a professional installation company but the parts look pretty cheapish to me. A local pump and integrated manifold or single circuit plus a sh!t load of plastic pipe which is also cheap if you don't buy it from the UFH companies. So while I'm at the planning stage I thought I'd ask here if anyone has done a suspended floor before? And even if not, you probably still have a better idea than me about this particular question so here goes: Many of the UFH "systems" for suspended floors come with aluminium trays that straddle the joists and have runs pre cut for the pipes. My question is, how the feck do you install that without putting your foot through the floor below ?? I can use an old board or two and can stand perched on joists but I'm just wondering how do they expect a roll of say 100M pipe to be man handled across a floor you have to be careful of every step on? www.theunderfloorheatingstore.com/media/wysiwyg/landing-pages/install-types/spreader-plate.jpg |
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Post by rocketmanbkk on Jun 7, 2019 6:39:50 GMT
If it looks like it does in the photo I’d say carefully!
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Post by tomplum on Jun 7, 2019 7:57:55 GMT
I can't see the link , it says forbidden  I,ve never done any dafty and I agree with you, Its just a pipe going underfloor ,snaking round then coming back up, I don't see why you just can' build a raised area one inch higher, with a insulated base to stop the heat going down, then create a new floor, |
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Post by dickpuller on Jun 7, 2019 10:52:30 GMT
Done it many times Dafty.
UFH has been done here in Jockoland for 30-40 years, well ahead of the rest of the UK.
I’m at work at the minute, but I’ll get you more details later, when I’ve finished going through this yummy mummy’s knicker drawer👍👍
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Post by dickpuller on Jun 7, 2019 14:21:13 GMT
OK there’s two main types of system for suspended wood floors on joists. 1. The plates as you describe, easy to install but run at a higher temperature. 2. A thermal mass with weak mix concrete/biscuit, weight can be an issue, but it runs at a much lower temperature.
Skoolboy Fizics told us wood is not a great transfer of heat, hence wood pot handles etc. So anything transferring the heat must touch the underside of the flooring.
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Post by DIYDafty on Jun 7, 2019 16:47:37 GMT
HAHA thanks Richard ! Any pics of the mummy ? Sounds like the cement mix layer is better heatwise but might take the floor up a bit and might need structural calcs etc so thinking about spreader plate or maybe this one since it minimizes the layers above the pipes. They say you need to put 6mm ply before finished floor but I wonder if I could put engineered wood floor directly on top? ambienteufh.co.uk/our-systems/ambichipboard/ |
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Post by dickpuller on Jun 7, 2019 18:07:12 GMT
A huge consideration is heat loss from any Room where UFH is the only form of heating & is particularly important with wood floors & joists.
As Heat Loss calculation will be required before you do anything.
Fail to plan, plan to fail!! Get it wrong & it’s an expensive mistake.
Remember wood floors give the lowest output with UFH.
Tile on concrete being the best👍
PS. No photos, you perv!!
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Post by dickpuller on Jun 7, 2019 18:12:47 GMT
HAHA thanks Richard ! Any pics of the mummy ? Sounds like the cement mix layer is better heatwise but might take the floor up a bit and might need structural calcs etc so thinking about spreader plate or maybe this one since it minimizes the layers above the pipes. They say you need to put 6mm ply before finished floor but I wonder if I could put engineered wood floor directly on top? ambienteufh.co.uk/our-systems/ambichipboard/60Watts/M2 that’s crap, depending on the type of flooring, but I’d be very surprised if you can achieve that. |
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Post by DIYDafty on Jun 7, 2019 19:06:14 GMT
A huge consideration is heat loss from any Room where UFH is the only form of heating & is particularly important with wood floors & joists. As Heat Loss calculation will be required before you do anything. Fail to plan, plan to fail!! Get it wrong & it’s an expensive mistake. Remember wood floors give the lowest output with UFH. Tile on concrete being the best👍 PS. No photos, you perv!!HAHA - Pot Kettle ? Serisouly, thanks a lot for your advice. After spending a few hours reading around I'm starting to conclude UFH might not be the right thing. The room is big but its above a cold external garage and all four walls are external and in the roof space. Looks like I'd need to spend a fortune on kingspan etc and then there are already quite a few services in the floor (including a gas pipe I'd rather not touch). I'll do a bit more reading and will do some heat loss calcs but thinking old fashioned double radiator might be the only way esp if we want wood as the finished floor? |
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Post by DIYDafty on Jun 7, 2019 20:36:46 GMT
Well simply City Plumbing calculator gives my heat loss at 3 Kw or 10,000 BTUs !!
Pretty much final nail in the coffin for UFH ?
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I,ve never done any dafty and I agree with you, Its just a pipe going underfloor ,snaking round then coming back up, I don't see why you just can' build a raised area one inch higher, with a insulated base to stop the heat going down, then create a new floor, 
