11
Fireplace Assembly Procedures
1) Plan ahead by placing the hearth components (without
mortar) in the place of the intended installation. Make sure
the width is 53” and deptch is 28’”. Mark the centers for the
rebar drill locations.
2) a)
Wood Floor Installations:
Floor preparation must have been completed as shown in
page 8 and if Anchor Brackets have been installed
properly, the protruding threaded rods should line up with
the rebar holes on the hearth slabs. Mix up a batch of
mortar and prepare intended underside and joints with a
1/4” bead, spread out evenly. One half overlaps the other.
Carefully place hearth slab that is to be overlapped first.
All-thread rods should stick up through the holes on the
hearth slab. Complete the overlapping hearth as shown in
Figure 13.
b)
Concrete Floor Installations:
Prepare the surface for Epoxy embedded rebar by drilling
5/8 inch diameter holes, 4 to 6 inches deep (see Figure 7
for locations). Thoroughly clean out the holes with
compressed air or a wire brush prior to the Epoxy process.
Cut your rebar to the desired length. The rebar included
with your fireplace is for standard Mason-Lite Fireplace
opening heights. If a height extension kit is considered,
you will have to purchase a longer length rebar.
Squeeze the epoxy into the hole and firmly push the rebar
to the desired embedment. (Figure 12). Be sure to
thoroughly clean out the hole with compressed air or a
wire bottle brush prior to placing the epoxy. This will
ensure a sufficient bond to the concrete.
Figure 12
Note* A DEPUTY INSPECTOR MAY ME REQUIRED
FOR THE EPOXY DOWELS PROCESS. CHECK WITH
YOUR LOCAL BUILDING DEPARTMENT PRIOR TO
REBAR INSTALLATION.
Figure 13
LH Hearth 2nd
RH Hearth 1st
53”
28”
Apply mortar
between joints
3) Before installing the side walls, confirm placement of
outside combustion air side block (if required), this can be
installed either side depending on which side is accessible
to outside combustion air. Prepare side wall footprint
with the prepared mortar. Note: In an island installation,
outside combustion air is obtained by feeding duct through
subflooring and then up to supporting structure.
4) Keep the assembly of the next sections of the firebox side
walls moving up, keeping components moist, mixing
mortar as you need it and threading the mortar
appropriately as you stack each section, one onto the
next. Constantly check for squareness and levelness while
building each course of block. As you complete each
section, make certain that you adhere the mortar at each
and every joint.
Figure 14
Setting Firebox Sides
5) After the last side walls are in place, add #3 rebar rods
and fill the firebox cells with mortar mix. Mix approx. 2 cu.
ft. of sanded mortar mix. Put 25% in cells and place #3
rebar vertically into holes on the hearth base. If a raised
metal platform was installed, place adjacent to all-thread
rods sticking through the cells. Make sure the bars are into
the hearth and at least 1/2” (one-half inch) below top of
firebox top surface. Finish filling cells.
Installing the Gas Fireplace
