Great questions; I would recommend our Silicone Vapor Shield SKU #10021412 if your substrate is wood. If it is concrete I would use our 6mil poly moisture barrier and our Elastilon underlayment.
The surface temperature of the subfloor must never exceed 85°F in any location.
You can find complete installation instructions on the product page by clicking on the specs tab and then clicking on - Installation Guide.pdf
What you should know about Elastilon Strong
An Elastilon-backed wood floor is much faster to install than traditional nail or glue-down methods.
Elastilon Strong can be installed on new concrete floors, handling up to 3.9% moisture content. A vapour barrier of at least 6 mil PE should be used below grade and on newly poured concrete above grade where the moisture content is above 3.9%.
Laid down with a 5/8” (15 mm) expansion gap, Elastilon Strong creates a dynamic, floating floor that expands or contracts naturally with the hardwood.
Elastilon Strong has no odor and is free of volatile materials.
Elastilon Strong gives cushioned comfort.
1/8” (3 mm) thick Elastilon Strong has ratings of IIC 62 and STC 54.
Thermal resistance: R _ 0,15 (m K) / W
Elastilon Strong carries a 70-year limited warranty. Thank you for your question
Answered on 3/28/2012 by customer care 2