BTRboard is installed similarly to conventional wall sheathing, using BTRboard fastening and installation requirements.
Wood-framed residential and light commercial wall assemblies
Continuous exterior insulation applications
Zero lot line wall assemblies using BTRboard FIRE-X
Continuous insulation retrofits
Project-specific applications
BTRboard OSB & BTRboard RESIST
6″ o.c perimeter
12″ o.c studs
Using 3 1/4″ x 0.121″ (or 0.131″*) smooth or ring shank nails.
* Larger diameter ring shank nails provide better shear resistance.
BTRboard FIRE-X substrate
6″ o.c perimeter
8″ o.c studs
Using 3 1/2″ x 0.131″ ring shank nails
BTRboard fastening requirements vary by panel type. BTRboard OSB, BTRboard RESIST, and BTRboard FIRE-X each have product-specific fastener
requirements. Refer to the current Installation Manual for fastener type, spacing, edge distance, embedment, and installation requirements.
Rim alignment: allow a 1-5/8″ inset where required to align BTRboard flush with wall plane.
Ground clearance: maintain 8″ (200 mm) from finished grade to bottom of BTRboard.
Joint spacing:
Backing, Blocking & Corners
All BTRboard panel joints must be fully supported by framing or blocking. Vertical joints must land on studs, and horizontal joints must land on blocking or structural members. BTRboard FIRE-X requires full support at all joints and tight joints with no gaps. Corner details must be installed to maintain structural support and air/water control layer continuity
Extend BTRboard FIRE-X panels continuously to the underside of the roof sheathing or as required by the approved assembly
BTRboard FIRE-X: Install panels with tight joints (no gaps); all joints must be fully supported as required
Air leakage is a major source of heat loss, discomfort, and moisture problems in wall assemblies. Many of these leaks occur at rim joists, floor-to-wall transitions, and
panel joints, where sealing is difficult from the interior. A more effective approach is to control air leakage from the exterior, using materials and steps already part of
the framing process.
Extend Sheathing over rim joist ends
Keep cuts straight
Use sealants
Opening Preparation
BTRboard FIRE-X
