Ditra Membrane with Radiant Heat in Basement?

[peep]

i am a lowly homeowner who is considering putting a stone floor in basement. builder is suggesting that i put the Ditra Uncoupling Membrane beneath stone so cracks won't occur. Basement slab was installed over a vapor barrier about 9 to 12 months ago. The basement has infloor radiant heat.

my questions:
a. ok to use ditra over radiant?
b. i am actually concerned about this membrane TRAPPING vapor between concrete subfloor and the membrane. I thought the idea to avoid mold was to let the basement floor breathe and give moisture a place to escape to rather than trap it like this membrane may. any thoughts about this?

thank you all.

[Tim_4_Tile]

Read up on Ditra over at Schluter's website... it's designed to allow vapor to escape at its edges.

http://www.schluter.com/6_1_ditra.aspx

[Tim_4_Tile]

And yes, quite compatible with radiant heat.

See page 13

http://www.schluter.com/media/DitraH...9-2007-ENG.pdf