WarmlyYours Environ Flex Roll System For laminate/floating wood & engineered wood floor coverings - Manual (Page 7)

5
Compatible Underlayments
Any type of underlayment/padding may be used as long as it has a density of
6-8 pounds per cubic foot.
Certain underlayment, such as ¼” (6mm) thick cork, or 5mm CeraZorb are
recommended for Environ™ Flex Rolls. It is also acceptable to place a vapor
barrier, such as a plastic sheet, under the underlayment. Underlayment papers
are not compatible with Environ™ Flex Rolls.
Underlayment is necessary to prevent Environ™ Flex Rolls from damage
from the weight of the floor, furniture, and people. Unavoidable wooden floor
movements will not harm Environ™ Flex Rolls. Wooden floors expand and
contract with temperature and moisture change. The wooden floor “moves” on
top of Environ™ Flex Rolls. This movement will not damage Environ™ Flex
Rolls when the installation is done correctly and the underside of the final floor
covering is installed evenly.
Some underlayment materials also have a noise reducing and insulating
effect. When installing over concrete, a ¼” underlayment is mandatory. Any
underlayment available in ¼” size is acceptable in most cases. CeraZorb,
cork, or ¼” to 3/8” of expanded polystyrene (EPS) with a density of 2 pounds
per cubic foot or more, are recommended for installation under Environ™ Flex
Rolls. When installing over a concrete slab, choose the underlayment with the
highest R-Value.
Compatible Wood Laminates
Verify that your laminate is warranted for use with radiant heat. Most modern
wood laminate floors are compatible with Environ™ Flex Rolls, but the
maximum thickness of the timber / laminate / wooden flooring should not
exceed 5/8” (15mm). Flooring that has metallic strips as part of its locking
system is NOT compatible, as these metallic strips may damage the Environ™
Flex Rolls. Also laminates that have their pad already attached to the laminate
are not compatible with the Environ™ Flex Rolls.
R-Value of Floor Covering:
The type and thickness of the floor covering materials used with this product
must not exceed a thermal insulation “R” value of 1.
Example R-values: LAMINATE FLOORING = R 0.675
WOOD FLOORING = R 0.80 maximum
Underlayment/Padding
Wood Subfloor
GROUT
CERAMIC TILE
CERAZORB
POLYMER-MODIFIED
THIN SET MORTER
IMPACTA T-700
BOND COAT ADHESIVE
OR LATEX MODIFIED THIN SET
5/8” (15mm)