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Cement Board Install
Install the supplied non-combustible cement board to overlap
the new horizontal & vertical 2 x 4's, place the cement board
above the fireplace throat, allowing 1/8" clearance from the rim
above the fireplace throat (opening). Secure the cement board to
framing with drywall screws. Drive screws flush with the surface
of the board.
SINGLE SIDED
Top (Qty 1)
Sides (Qty 2)
Bottom (Qty 1)
DRSQ42
Top
48" x 181/4"
Bottom
48" x 71/16"
Sides
51/16" x 271/16"
REVISIONS
DESCRIPTION
DATE
CHANGED BY
.
Figure 17.c Supplied non-combustible cement board dimensions
-
NOTICE
Supplied cement board can be drilled to add extra fasteners or support if
finishing application calls for it. No extra fasteners shall be used to attach
cement board to fireplace body
NOTICE
Cement board installation is not required when venting the chase or
using a cool wall kit.
30
Cut standard Gyproc / Drywall
b o a r d t o c o m p l e t e t h e
installation of the surround. Fit
the edge of the board to the rim
around the fireplace opening.
Fasten the board in place using
standard drywall screws.
1
3
2
DRSQ46
Top
52" x 181/4"
Bottom
52" x 71/16"
DIMENSIONS ARE IN INCHES
Sides
TOLERANCES:
51/16" x 311/16"
FRACTIONAL
1/32"
Drawn by
TWO PLACE DECIMAL
.015"
THREE PLACE DECIMAL
.005"
ANGULAR
.5
Revision
ALL BENDS ARE ASSUMED
-
TO BE 90 UNLESS NOTED
OTHERWISE.
STONE FACINGS
One peace stone, marble, granite that is cut in U shape to cover the
sides and top areas around fireplace is not recommended. Doing so
can lead to crack formation due to thermal expansion.
Before using any polished stone facing material, especially light colored
one, run heat exposure tests on a samples and check for discoloration
and breakage or chipping. Polyester or epoxy resin coatings might
be used to strengthen, seal and polish natural stone. These coatings
might structurally fail when exposed to heat. Sample pieces should be
exposed to 300°F for at least 8 hours. Compare heat exposed sample
to unheated piece and judge for color change, cracking and chipping.
ITEM NO. PART NUMBER
DESCRIPTION
If finishing material is sensitive to heat (discoloration or chipping) or
single peace stone finishing is desired, Cool Wall Advantage kit must
be used. This will greatly reduce temperatures to finishing materials
1
CBDRSQ38T
Top Cement Board
Bottom Cement
2
CBDRSQ38B
Board
3
CBDRSQ38S
Side Cement Board
It is highly recommended to apply high temp resistant RTV Silicone
where cement board touches fireplace body. At least 48h cure time
NAME
DATE
Description
DRDSQ38-Cement Board Assembly
DM
2020-04-06
DWG. NO.
DRSQ38-Cement Board Assembly
Revision / Date
MATERIAL
1/2 Firepro Wallboard
Supplied cement board is for minimum installation requirements for non-
Finish
SCALE
1:12
WEIGHT:
combustible surfaces. When installing heavy finishing materials such as
Natural Stone, Granite, Marble, Etc., Full sheets (4'x8') of cement board is
recommended to minimize number of joints and to reduce risk of cracking
(supplied cement board can be used as stencil to pre-drill the board with a
1/8" drill bit in the new calcium silicate based cement sheets)
PRIMERS, ADHESIVES & MORTAR
Use caution when selecting primers and adhesives. Mortar should be
high temperature rated. Premixed tile adhesives should be avoided
because of long cure times and periods of off gassing and high possibility
of shrinkage. Modified tile thinset is not recommended (unless adhesive
manufacturer approves fireplace installation) because modifiers in
thinset can offgass or cause shrinkage then exposed to heat.
Unmodified and unmixed Portland cement based mortar is
recommended for tile and stone. Please confirm with finishing material
manufacturer if adhesion is sufficient.
Installation
MATERIAL
QTY.
1/2" Firepro
1
Wallboard
1/2" Firepro
1
Wallboard
1/2" Firepro
2
Wallboard
NOTICE
before applying finishing or firing fireplace
NOTICE
SHEET 1 OF 2
XG0232 - 043021
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