Originally Posted by digexpressions
I'm trying to figure out what type of underlayment is best for 6"X70" planks of bamboo. Will be installing this over a concrete slab. Thanks.
When installing over a concrete slab, there is the inherent moisture content in all concrete slabs, that should be taken into onsideration.
A vapor barrier is recommended...and basically, it's required.
These can be applied in the form of a 4mm to 6mm thick poly sheet layer over the concrete. Generally, a pad is then installed next for the underlayment. You can also purchase higher quality laminate-underlayment pads with a vapor barrier already attached to the bottom side of the padding. You can even purchase "green" underlayment pads, made from recycled materials. We have used some made from recycled jeans/denim.
Example Link: http://ezinearticles.com/?Installing...nts!&id=307282
- "If the laminate flooring is going to be installed on a concrete slab floor where there is earth below the concrete, a vapor barrier must be placed between the concrete and the laminate. The seams should be taped with a moisture resistant tape. Laminate flooring should not be installed on any floor that has a drain. "