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ADJUSTABLE FRAMING BRACKETS
The ML-39 model is factory equipped with Top, Sides and Bottom adjustable framing brackets. These parts can slide
backwards the thickness of the
Finishing Material base substrate
such as Durock, Hardibacker (in non-combustible
zones) or Drywall board (in combustible material allowed zones). The framing depth shall be reduced by the thickness of
the Finishing Material base.
What is the core purpose and end benefit of the adjustable/sliding Top, Sides and Bottom Framing Brackets?
Adjusting the adjustable Top, Sides and Bottom framing brackets backwards equal to the thickness of the
Finishing Ma-
terial base Substrate
results in only the thickness of the final finishing material protruding out from the face of the ML-39
unit. Doing this allows you to remove and discard the Inner Guides if installing tiles with metallic tile edging strips or if in-
stalling the Grace Front on top of the Final Finish Material. The Grace mounting brackets allow in/out adjustment for final
finish material thickness of up to 2 inches.
How is the Rough Framing Depth of ML-39 affected if you adjust the Outer Framing Brackets?
1. The nominal rough framing depth for the ML-39 is 19-1/2”. You may slide the Outer Framing Bracket backwards
to reduce the rough framing depth by the same amount. Example: If you slide the Outer Framing Brackets back-
wards ½”, then the required rough framing depth will be 19-½” – ½”= 19”.
What do these adjustable Outer Framing Brackets parts affect?
1. The adjustable outer edge metal parts eliminate the need for the Minimum 1” thick finishing material thickness.
2. If you reposition the Outer Adjustable Framing Brackets, you should remove and discard the Inner Guides. In-
stead, use metallic tile edging strips, available at home improvement stores in various shapes and colors. Never
use polymeric (plastic) tile edging strips.
FINISHING MATERIALS INSTALLATION
All finishing materials that surround this fireplace’s rectangle profile must extend out from the face surface of this fireplace
1 inch if the 19-1/2” framing depth is used and the Inner or Outer Finishing Guides are utlizied. A MAXIMUM THICKNESS
OF 2” OF FINISHING MATERIAL IS ALLOWED OVER THE FACE OF THE UNIT WHEN USING THE INNER GUIDES
AND INSTALLING A GRACE FRONT! If you wish to install finishing materials in thickness greater than 2” with the Grace
Front, use outer guides.
Tiles and Faux Rock
If installing Tiles or Faux Rock, first install a ½” thick (minimum) Cement Board (Hardibacker or Durock Brand) over the
face of the fireplace and framing members. Follow by applying ThinSet mortar (no polymer additives) using ¼” square
notched trowel on the cement board surface. Finally, install tile to reach a finish material depth of 1 inch.
WARNING OF ODOR RISK:
Cement Boards used shall not contain any polymer based fibers or polymer materials. Thin-
Set mortar with polymer additives is not allowed. If in doubt, use RTV 500
o
F rated high temperature silicone to adhere tile,
granite or marble to the face of unit. Always apply the silicone in 1/8” wide beads in spline shape vertical lines only. Allow
at least 24 hours to for the silicone to cure before firing this fireplace.
Marble and Granite Slabs
If installing Marble or Granite slabs as fascia materials, specify that the inner edges that will be adjacent to the Glass Door
are polished. Rough Framing should be created at 19” depth with the front surface of this fireplace protruding out ½” from
the framing surface.
Install 1/2'” thick drywall on framing members so that its outer surface is flush with the front face of this fireplace. Attach
Marble or Granite slabs to face of unit and to drywall surface using adhesive that does not off gas when hot. Mendota rec-
ommends the use of Copper RTV Silicone as the adhesive applied in thin 1/8 beads of spline shapes. NEVER place large
globs of any adhesive or Copper RTV Silicone between two faces. Doing so will cause odor issue for long periods of time
after installation is completed.
In the area defined as “NONCOMBUSTIBLE ZONE”, only NONCOMBUSTIBLE MATERIALS ARE ALLOWED. DO NOT
INSTALL DRYWALL OVER THE NONCOMBUSTIBLE ZONE.
WARNING OF ODOR RISK
Cement Boards used shall NOT contain any polymer based fibers or polymer materials. ThinSet mortar used
shall not contain any polymer additives.
