PermaBASE heat shield applications



  • Protects walls and floors.
  • Reduces clearance in back up to 40%.
  • Lightweight and easy to install.
  • CAN/ULC- S632 & UL1618 tested.

Do not apply combustible finishes, such as wallpaper, on the panel surface.


The heat shield made with PermaBASE boards can reduce the required clearance between a heat-producing appliance and the wall by up to 40%, except where the clearance includes provision for access or ventilation.

Furring is made by cutting a full PermaBASE panel into 4" (100 mm) wide strips. Attach a double layer of these furring strips to the wall studs using cement board screws which provide a minimum penetration of 3/4" (19 mm) into the framing. When installing the panels, leave a minimum 2" (50 mm) gap at the ceiling and a 1"- 2" (25-50 mm) gap on the floor.

Fasten the PermaBASE panels to the studs with galvanized roofing nail or cement board screws spaced 8" (200 mm) o.c. Be sure your cement board screws are long enough to go through the furring and into the studs at least 3/4" (19 mm). Do not put any nails or

Finish the joints with polymer-modified Portland cement mortar and alkali-resistant fiberglass tape. Cover fasteners with the same mortar. The mortar should be dry before applying any decorative coating.

Heat build-up is reduced by allowing air to enter and exit the cavity between the wall and the heat shield. This air space is required for the good functioning of the heat shield. Do not close or block these openings.