Underfloor heating, how to do it??


Postby gumbo » Fri Feb 06, 2009 8:45 pm

I want to put some underfloor heating in my bathroom, it has wooden floorboards so is it just a case of lifting the boards and extending the heating circuit via running copper pipes underneth or is there more to it?
gumbo
Rank: Apprentice
Progress to next rank:
26.3%
Posts: 10
Joined: Sat Dec 08, 2007 11:40 pm

Sponsor

Simply Build It

Postby stoneyboy » Sat Feb 07, 2009 3:02 pm

gumbo,
If you run the flow and return pipes on opposite sides of the bathroom and link them with many pipes (two per gap between joists) this will give you underfloor heating. You will need some sort of adjustable flow restrictor on each of the link pipes so you can restrict the flow and balance across the room.
Because the heat source is under the wood flooring it will take more than 2 hours for the warmth to be felt in the floor but provided you accept this it is a cheap way to fit underfloor heating.
end
stoneyboy
Rank: Project Manager
Posts: 2745
Joined: Wed Dec 10, 2008 6:44 pm

Postby htg engineer » Sat Feb 07, 2009 5:19 pm

Firstly why do you want it ?
Wooden floors do not tend to get cold, it's normally concrete floors where people want underfloor heating.

Is it ground or first floor ?

If your bathroom is upstairs, I really wouldn't bother - stick with the radiator.

http://www.wetunderfloorheating.co.uk

It may also be worth considering electric underfloor heating.

htg
htg engineer
Rank: Project Manager
Posts: 3224
Joined: Tue May 22, 2007 5:22 pm

Postby nitro23456 » Sun Feb 08, 2009 8:55 am

Stick in an electric underfloor heating mat and tile on top, easier, better imo.
nitro23456
Rank: Foreman
Progress to next rank:
48.7%
Posts: 346
Joined: Sun Aug 12, 2007 6:19 pm

Postby gumbo » Mon Feb 09, 2009 12:53 pm

Bathroom is first floor and will eventually be tiled hence the reason id like underfloor heating.
I have looked at electric mats but id imagine them to be quite costly so thought running the heating pipes underfloor would be a cheaper option
gumbo
Rank: Apprentice
Progress to next rank:
26.3%
Posts: 10
Joined: Sat Dec 08, 2007 11:40 pm

Postby stoneyboy » Mon Feb 09, 2009 6:27 pm

gumbo,
Electric expensive - yes, you're looking at about 150w per square metre so for a 3x3m bathroom floor = 1350w. Doesn't seem much until you consider if you want 2 hours am and 4 hours pm warm floor, the electric will be on for about 4 hours per day. If every day for three months in the winter your quarterly bill will go up by about £100.
end
stoneyboy
Rank: Project Manager
Posts: 2745
Joined: Wed Dec 10, 2008 6:44 pm

Postby gumbo » Sat Feb 14, 2009 7:09 pm

Thats why i dont want electric. So would just extending the heating pipes under the floor boards give much heat or would i be wasting my time?
gumbo
Rank: Apprentice
Progress to next rank:
26.3%
Posts: 10
Joined: Sat Dec 08, 2007 11:40 pm

Postby stoneyboy » Sun Feb 15, 2009 2:52 pm

gumbo,
Yes I have done it before but it does take some time (2 hours) for the floor to warm up - the heat has to travel through the floorboards and tiles. Insulate under the pipes and don't forget flow restrictors so you do not get a short circuit along the first link pipe in the system.
end
stoneyboy
Rank: Project Manager
Posts: 2745
Joined: Wed Dec 10, 2008 6:44 pm

Display posts from previous
Sort by
Order by



  • DIY How to Project Guides

  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!



 


  • Related Topics