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125160-01_D
28
FIREPLACE INSTALLATION
Continued
3. Mix a batch of mortar and prepare bottom surface of Right
Side Hearth to be bonded (Figure 49), then lower the piece
into place on the outline created before. Align lower Right Side
Hearth on the outline created. The 67” width dimension allows
for an approximate gap of 1/8” between slabs for the additional
mortar to unite the remaining slabs. Continue process for
remaining hearth sections while moistening and adding mortar
between joints at slab ends.
4. Apply mortar in like manner to the Center Hearth and place next
to the Right Side Hearth. Check that surface is LEVEL and use
shims if necessary.
5. Apply mortar to the remaining Hearth except this time apply
beading on surface to be facing floor as shown in Figure 50.
6. Before installing side walls, confirm placement of outside
combustion air access (if required), this can be installed
either side depending on which side is accessible to outside
combustion air (all diagrams in this manual show the
combustion air inlet hole on the right side).
7. Prepare side wall mating surfaces with the prepared mortar as
shown in Figure 51.
8. Keep the assembly of the next sections of the firebox side walls
moving up (Figure 52), 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 every joint.
1/2
"
away from
edges
1/2
"
mortar bead
typical
MFP63-1 Hearth shown prepared
for Right Side position
MFP63-1 Hearth section shown
prepared for Left Side position
Apply mortar bead to
all mating surfaces
Figure 49 - Preparing Hearth Base (MM63)
Figure 50 - Prepared Hearth Base (MM63)
Side Wall shown prepared for Right Side Air Access.
For Left Side, bead opposite side.
1/2" (13 mm)
away from edges
Figure 51 - Preparing Side and Rear Wall Pieces (MM63)
Apply
mortar
Combustion Air Access Right
or Left (Right shown).
Apply mortar
Begin with the smallest
rear wall to the right
side as shown below.
Figure 52 - Layering walls and sides for MM63