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Customer questions and answers for
DUROCK Next Gen 5 ft. x 3 ft. x 1/4 in. Cement Board

The DUROCK Brand Next Gen 5 ft. x 3 ft. x 1/4 in. Cement Board is an ideal substrate for floor and countertop ceramic tile installations. The 1/4 in. thickness helps eliminate transition trim when abutting carpet or wood flooring and minimize level variations with other finish materials. It can be applied directly over old substrate on countertops to save time. It features formed smooth edges and square-cut ends.
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Customer questions and answers for DUROCK Next Gen 5 ft. x 3 ft. x 1/4 in. Cement Board

Question

R value of the various thicknesses

Asked by
KeithWDavis
Pennsylvania
about Next Gen 5 ft. x 3 ft. x 1/4 in. Cement Board on
May 12, 2013
I am installing on floor over radiant heat source and require the R value rating to determine my best option under the floor tile. Please and thank you.
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answer 1
Asked by
USG4YOU-TechnicalSupport
May 13, 2013
Hello Keith and thank you for your question. The R-value of the ¼” Fiberock is 0.2. If you have any further questions please feel free to contact us again.
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answer 2
Asked by
USG4YOU-TechnicalSupport
May 13, 2013
Keith, I am sorry. I meant to say the1/4” Durock has an R-value of 0.2. Thanks again.
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Question

Are Durock sheets "fire Proof" ???

Asked by
Bob
Colorado Springs
about Next Gen 5 ft. x 3 ft. x 1/4 in. Cement Board on
March 29, 2013
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answer 1
Asked by
USG4YOU-TechnicalSupport
April 1, 2013
Hello Bob, thank you for your question regarding our Durock Cement Board. Durock Cement Board panels are noncombustible. However, even though the Durock Panels will not burn, they could allow enough heat to transfer through them to allow something behind them such as wood framing to catch on fire. If the Durock Panels are to be used in a Fire Rated Assembly care should be taken to be sure they are being used in an Assembly tested and approved by an organization such as Underwriters Laboratories.
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Question

CAN I use this to install in a shower then install ceramic tile over???

Asked by
LLOYD
about Next Gen 5 ft. x 3 ft. x 1/4 in. Cement Board on
December 1, 2013
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answer 1
Asked by
USG4YOU-TechnicalSupport
Chicago, IL
December 2, 2013
Hello Lloyd, thank you for your question regarding our Durock Next Gen 1/4"x3'x5' Cement Board. For walls and ceilings we only recommend using either 1/2" or 5/8" Durock Cement Board. The reason for this is the 1/4" panels have too much flex to them because of their thickness. That little extra flex is just enough movement to possibly allow for movement in the wall that could lead to cracking in the tiles or the grout lines. The 1/4" Durock Panels are fine to use for countertops or floors where there won't be any movement possible.
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Question

1/4 cement board over 1/2 sheetrock in tub area

Asked by
Hogs
about Next Gen 5 ft. x 3 ft. x 1/4 in. Cement Board on
February 19, 2014
I saw your answer for using 1/4 inch for tub areas but how about if this product is applied directly over 1/2 sheet rock and then tiled over it. Will it then be strong enough not to flex?
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answer 1
Asked by
USG4YOU-TechnicalSupport
Chicago, IL
February 20, 2014
Hello Hogs, thank you for your question regarding our Durock Cement Board. USG does not recommend installing our Durock Cement Board or Fiberock Aqua Tough Panels in a wet area over a regular Wallboard Panel. Our concern would be that if moisture were to get to the Wallboard Panel 2 things could possibly happen. Mold could begin to grow on the Wallboard, or, if there is enough moisture the Wallboard Panels could begin to decay and affect the walls integrity causing movement in the wall which will adversely affect the tile.
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