Multiple sub-floor levels...best way of getting FFL? - TilersForums.com

[Rod Evans]

Thanks for your help with this gents..

I'm with you on Karndean throughout as that was the original plan, but my significantly better half looked lovingly at some tiles, and I'd love to be able to sort that out for her!

I think i forgot to mention tvst tbete are three otber rooms linking to the kitchen which I'll also be levelling to. Karndean worked out OK across all of it.

Basically I was thinking to put an 'L' shape area of tiles around the sink...dishwasher ...cooker area and I reckon 5ish mm of level change would be OK. My concern would be the join breaking up over time...is that likely?

 

[Rod Evans]

Forgot to say that I was looking to keep the matetial level above tbe UFH as small as possible to maintain thermal efguciency etc....maybe that's not possible?

I was told ply is better than chip and 22mm Ply will take MUCH longer to warm up than 18mm...surely it can only be approx 25% ish more....unless 22mm ply become an insulator with tog levels etc?

 

[Just Rizzle]

if you want it level you could reduce down rather than build up take up t and g put in extra noggins and and over lay with hardy backer 2 layers of 12 mm board to get your levels even.

 

[Rod Evans]

Thanks Ray

Would 2 layers of 12mm... cross bonded..be regarded as a structural floor and equivalent to 18mm t&g?

 

[Just Rizzle]

just read your post again could you not use t and g and use hardy backer boards 2 layers of 12mm bonded together with fiberous adhesive and screewed this will give you a better heat transfer than putting insulator down ie wood for l v t and tiles you can screed over the backer board for smooth surface to put karndean down

 

[Just Rizzle]

Thanks Ray

Would 2 layers of 12mm... cross bonded..be regarded as a structural floor and equivalent to 18mm t&g?

talk to hardy technical