FOAMULAR® Exterior Wall Installation
Follow these manufacturer’s instructions to get the best out of your Owens Corning rigid insulation board. For more installation instructions and other insulation-related info, head over to the Owens Corning website.
- Tape measure
- Utility knife
- Straight edge
- Hammer or power screwdriver
- Cut-resistant gloves
- OSHA approved safety glasses
- Power cap nail gun
- Ensure that the substrate is clean and dry. Remedy all protrusions or surfaces that are not flat.
- Remove obstacles to the work area including all potential trip hazards.
- Do not install during inclement weather.
- Verify that ladders and/or scaffolding are in safe, working condition.
- Start in corner. Install FOAMULAR® vertically or horizontally, like installing wood sheathing, working towards opposite end of wall.
- If installing over wood sheathing, start 1 foot past the corner and cut that piece off. This will cover the seams of the wood sheathing and help reduce air leakage through the wall .
- Use cap nails or staples 12″ on-center for the perimeter and 16″ on-center for the field. Fasteners must be long enough to penetrate ¾” into sheathing/framing
- Tightly butt each successive board, then nail or staple into place.
- Seal all seams and penetrations with HomeSealR™ foam joint tape.
- Cover entire wall then go back to remove penetrations like windows and doors. Use the framing to guide cuts for removal.
- Use HomeSealR™ tape for any repairs.
- This product is not required to be installed by someone trained or certified by the manufacturer.
- As is, this product undergoes no chemical reaction and is in its final form when purchased. There is no need to evacuate the building during installation.
- FOAMULAR® cannot be in contact with hot surfaces such as chimneys or heat sources over 165 degrees F.
- Air Sealing—in applications that require air sealing, use Owens Corning® HomeSealR™ foam joint tape to seal joints between boards. Use Owens Corning® FlashSealR® foam flashing tape to seal FOAMULAR® to other substrates.
- Use HomeSealR™ to repair breaks. Replace foam into the board and then tape with HomeSealR™ to repair holes.
- Avoid leaving FOAMULAR® exposed for extended periods of time.
- For use in exposed applications refer to Code Evaluation Report UL-ER8811-01 and local building codes regarding the need for an ignition barrier.
- To cut boards to size, score with box knife then snap at the score • Use a 4″-6″ thin blade knife to cut holes or other penetrations through the FOAMULAR®