CH pipes under floor

Joined
22 Jun 2006
Messages
251
Reaction score
1
Location
London
Country
United Kingdom
Hi-
I have just finished adding a radiator to a room that has an existing one. The existing pipework was layed directly under the floor in shallow notches in the joists. I ran the new pipes the same way (15mm copper flow & return laid across large joists notched about 25mm).

This means, of course, that the pipes are only about 10mm below the floorboards, and at times a bit less. Is there any likely problem here from the heat warping the boards? Perhaps I should put foam insulation around the pipes - is this the normal practice?
 
Sponsored Links
Normal practice if they can't be slung under joist, and as they are copper joist can't be drilled.

notch 1/8th total depth max, not in joists less than 100mm positioned 1/14th to 1/4 total joist span from either wall where joist terminates.

Insulate pipes outside heated zone (in loft or under ground floor)
 
If you drill the board and then screw through in to the joist at both sides it wont be able to warp
 
Sponsored Links
Thanks - it's a first floor room, so it seems that insulation isn't necessary (?). The pipes run under the centre of the floorboards, so, yes, when they're nailed down either side I agree, warping would be difficult.
There aren't too many options here, anyway, I guess.
 
Warping is due to differential drying of the moisture content.

In an existing betroom the moisture content will be low say 10-20% if that so warping is unlikely to be a problem.

The copper tube should be wrapped with felt or old carpet where it goes over the joist so that it does "click" when it expands.

Tony
 
Thanks - I'll put some felt down as suggested and otherwise leave it as is.
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Back
Top