Underfloor piped heating for suspended wood floor

[patrizio72]

I am having a dilemma at the moment as I want the whole ground floor of the house heated under floor. The extension we are having built will be tiled and have plumbed under floor heating installed but the rest of the ground floor is a suspended wooden floor, living room and hallway. My question is how difficult is it to do, is it very effective as I am unsure how heat will effectively travel through multiple layers of wood efficiently, and finally will it be very expensive?

Many thanks
Patrick

 

[Dotty]

Perfectly feasible. Yes if installed correctly. And quite possibly!

Suspended floor by MYSON

 

[Ermintrude]

My house is awesome and has suspended wooden floors tiled and stripped 150 year old boards too.

example based of 8*2 joists.

SCREW ( not nail) batten to joists so that it bottom flush with bottom of joist. Then cut celotex 90mm ish to space between joists and push down so it rests on battens.

Next fit noggins at 600mm from walls so top of noggin flush with top of insulation. Lay pipe in between joists and use noggins for wrap over clips to help form bends use staples rest of way.

Mix weak 10:1 screed and fill above insulation to top of joists.

Screw down 9mm ply to joists.

Lay on boards and run heating for 5 months

Then nail them in to place sand fill and varnish.

Floor will be amazing.

 

[patrizio72]

Thanks for all your help. It needs to be run for 5 months before the boards can be nailed down? roughly how much did it all cost?

 

[Ermintrude]

Need to get moisture content stable in timber if you nail boards and heat they will crack like rays diet restrain in a cheese farm.

Well

Insulation £30 and timber 30m2 ish
Pipes £300
Manifold blending kit £300

 

[patrizio72]

Yeah I see what you mean about the moisture, I'm guessing the same would apply to engineered wood flooring too. Would the ply not distort too though?

 

[Ermintrude]

Ply is dry and cross grained also it's screwed down. Check engineered floor- that's usually floating anyway. But the base layer - foam or what ever may need to be suited to ufh!!!

 

[patrizio72]

The base layer on engineered wood flooring is like a sandwich of ply wood underneath the layer of real wood, I have found ones which are suitable for underfloor heating but not sure about the screed moisture issue as they're not nailed to the floor but merely locked and glued together

 

[Ermintrude]

Just stack them in room for a few weeks. The screed is dry. U use just building sand - preferably dense red sand and cement . NO added water