48" Red Oak Riser

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No I would not recommend this.

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For complete Underlayment application information; Please go to our Website @ LumberLiquidators.com and at the bottom of the page click on Flooring 101, enter –
LL Underlayment Guide- , enter, then click on the PDF to open. Thank you for your inquiry.

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I recommend Quiet Walk. For padding attached laminate flooring use Eco Silent Sound or Bellawood Premium Underlayment.

Additional moisture barrier may be necessary if installing over concrete. See flooring manufacturer installation instructions (generally found under specs tab on floor page or Flooring 101 www.lumberliquidators.com/ll/flooring/Flooring101).

You can also find specific information on underlayment there.

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This affordable padding offers very little R-value, I would recommend one of our better cushions to achieve what you are trying to do.
For complete Underlayment application information; Please go to our Website @ LumberLiquidators.com and at the bottom of the page click on Flooring 101, enter –
LL Underlayment Guide- , enter, then click on the PDF to open. Thank you for your inquiry.

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A 6 to 8 mil poly sheeting moisture barrier should be laid for floating floors for an On or Below Grade Concrete subfloor. Overlap seams 4" and tape with duct tape. Overlay perimeter 3-4" up wall. Then lay approved underlayment.

You will need either Foam Underlayment, Eco Silent Sound, Bellawood Premium Underlayment, or Quiet Walk underlayment for floating floors (unless you purchase foam attached laminate flooring which needs none) -
http://www.lumberliquidators.com/catalog/section.jsp?categoryId=19

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Flat wood subfloors
• The final surface must be flat to within 3/16" in a 6' radius, or within ¼” in 10’. Subfloor must be securely nailed or screwed down to joists to prevent movement or squeaks. Install over 16” center-to-center joist sub-structure. Thoroughly inspect and replace existing floor or subfloor that shows evidence of water damage or structural weakness. Check for and repair any sagging or loose sections of a wood subfloor. Squeaky or loose boards should be re-nailed. An uneven or cupped wood subfloor is an indication of excess moisture, identify and correct. High spots may be planed or sanded down. Low spots should be cut out and repaired or may be filled with old pieces of firm vinyl or build up with 30 lb. black roofing paper. Do not fill low areas with cement patches as these will break down over time.
Flat concrete
• A flat cement surface is very important when gluing down ridged solid wood. The final surface must be flat to within 1/8" in a 6' radius, or within 3/16” in 10’. Sand or grind down high spots. Fill valleys or low areas with cement based leveling compounds compatible with the flooring adhesives. Allow extra drying time for the leveling compounds. Do not install on new concrete less than 60-90 days old.

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This will not provide enough support for a carpet installation, you will need to purchase a pad designed for carpet.

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Yes it is.
Thank you for writing in.

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100 square feet per roll:
What size are the rolls? 4’ wide x 25’ long x 1/16” thick.
Thank you for your inquiry

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Unfortunately it is not. Our Nirvanna Plus Foam Underlayment 100 Sq FT Roll is and cost only $32.99 each.
Thank you for your inquiry.