Section 7: Finishing; Installation Of Cement Board; Installing Gyproc/Drywall - Montigo R520 Installation & Maintenance Manual

R520 & R620 Power Vent Indoor Gas Fireplace
Section 7: Finishing the fireplace
As shown in Figure 19; Install the supplied Non-combustible cement board to overlap the new Horizontal & Vertical 2 x 4's, See Figure 5.
Place the Non-combustible wall board above the fireplace throat, allowing 1/8" clearance from the rim above the fireplace opening. Pre-drill
the board with 1/8" drill and secure to framing with Nails, use flat heat sheet metal screws to fasten the board to the metal header.
(Non-Combustible cement board R520*: 72" x 15 1/2" R620*: 82 1/2" x 15 1/2" x 3/8")
Sheet metal Screws to attach Non-Combustible
cement board to Steel header.
Pre-drill for Nail fasteners
Combustible framing
Clearance required for
expansion of the fireplace
when in operation.
1/8"
Figure 19. Non-combustible Board over the Fireplace, (supplied by Montigo).
Cut standard Gyproc / Drywall board to complete the installation of the surround. Fit the edge of the board to the rim around the fireplace
opening. Fasten the board in place using standard drywall screws.
Figure 19a. Fireplace installation (Cut the remainder of Gyproc / Wall board to complete the fireplace surround).
Page 30
Installation
Non-Combustible cement board,
(supplied by Montigo) or Equiv.
Wall board / Gyproc or
Equiv. (Bottom & Sides)
XG0771 - 040513.3