Raised Hearth Extension Framing

The hearth framing must be constructed of non-combus- tible materials (Figure 12.2) and placed on 1/2 in. Durock and two HX4s (or equivalent material) (Figure 12.4). When creating the platform, allow for the thickness of the non- combustible finishing materials (Figure 12.5).

IMPORTANT! Hearth extension design must be determined before installation of fireplace.

Continuous, non-combustible sealant

Durock

Tile, stone or other

Fireplace

Protective

Extensions or

non-combustible material

Two HX4 Hearth

 

 

 

equivalent insulation

 

 

Metal Hearth

(see Table)

 

 

Strip

Floor constructed of wood or

2 in. (51 mm)

other combustible material

required

 

Figure 12.2 Hearth Extension Construction

Bottom of fireplace opening;

 

 

finished hearth surface must

 

 

NOT be above it.

 

Platform must be built

 

 

 

 

to raise the bottom of

 

 

the fireplace opening

Noncombustible

 

to the level of the

Finishing Material

 

desired hearth height.

Double

Protective Metal

Floor

Hearth Strips

HX4 or

equivalent

 

 

& 1/2 in. Durock

 

 

 

Noncombustible

 

 

Framing Material

 

The bottom of the fireplace opening is 3-3/4 in. (95.3mm) above the bottom of the fireplace. Finished hearth must NOT extend above this level.

Figure 12.3 Raised Platform Hearth Extension Detail

Noncombustible

2-HX4s or

Framing Material

equivalent

 

 

& 1/2 in. Durock

Figure 12.4 Raised Platform Hearth Extension-Framing Materials

Noncombustible

Finishing Materials

Figure 12.5 Raised Platform Hearth Extension-Finishing Materials

Heat & Glo • RUTHERFORD-504059-333 Rev C • 06/08

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Heat & Glo LifeStyle 50 owner manual Raised Hearth Extension Framing

50 specifications

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