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Valor Fireplaces • 190—2255 Dollarton Highway • North Vancouver, BC • V7H 3B1

Tel: 604.984.3496 or 1.800.468.2567 • Fax: 604.984.0246 or 1.800.268.0333

www.valor

fi

 replaces.com

March 2023

1/3

Cement Board

LT1 2500K

Material Specifi cations

Non-Combustible

Material which will not ignite and burn. Such materials 

are those consisting entirely of steel, iron, brick, tile, 

concrete, slate, glass or plasters, or any combination 

thereof.
Materials that are reported as passing ASTM E 136, 

Standard Test Method for Behavior of Materials in a 

Vertical Tube Furnace at 750°C shall be considered 

non-combustible materials.

Combustible

Materials made of or surfaced with wood, compressed 

paper, plant 

fi

 bers, plastics, or other material that 

can ignite and burn, whether 

fl

 ame proofed or not, 

or plastered or unplastered shall be considered 

combustible materials.

Non-Combustible Cement Board

The LT1 Linear 

fi

 replace requires a 1/2” (13

 

mm) thick 

non-combustible cement board to be used as a wall 

surface immediately surrounding the unit’s opening—

see diagram for minimum coverage.
Extending the cement board well beyond the minimum 

shown will help avoid cracking due to di

 erential 

expansion of materials.
Pre-drill cement board with oversized holes and do 

not over-tighten screws to avoid cracking due to heat 

expansion. 
Standard gypsum wall board may be used beyond the 

perimeter of the cement board. 

D

Min. 48” (1219 mm)

E

M

in. 47-3/8”

 (1203 mm)

D

D

Flush with bottom of unit; 
add extra cement board 
if overlapping framing.

Minimum coverage area of non-combustible board. 
Any 

wall

 finish applied to shaded area must be non-combustible.

LT1 fireplace outline
(including stand-offs)

Non-combustible
board required 
thickness: 
1/2 inch (13 mm)

A

B

C

Joints preferred at corners
to prevent cracking

inches [mm]

With 2575 trim

With 2530CIK trim

A

Min. 20-1/2 [521]

Min. 20-1/8 [511]

B

19-1/2 [496]

21 [533]

C

Min. 8-11/16 [221] Min. 8 [203]

D

Min. 4 [102]

Min. 3-3/8 [84]

E

Min. 39-7/8 [1011] Min. 41-1/8 [1045]

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