ISOGARD HD must be neatly fitted to all roof penetrations and projections. Do not install more boards than those that can be covered with membrane and completed before the end of each day’s work or before the onset of inclement weather.
ISOGARD HD can be applied over existing as well as new roof surfaces and under fully adhered or mechanically attached single-ply roofing membranes. Boards must be installed using approved fasteners and plates or insulation adhesives.
The number of fasteners per board needs to be determined based on a wind uplift calculation in accordance with local building codes and taking into account a minimum requirement of 12 fasteners per board in case of a fully adhered single-ply roofing membrane and minimum 8 fasteners in case of a mechanically attached membrane.
Please contact Firestone’s technical department for further information on fastening patterns.
- Keep boards dry at all times. Bundles need to be elevated above the water line to prevent moisture infiltration from the bottom.
- Combustible. Refer to Safety Data Sheet (SDS) for more information.
- Do not install over wet, damp or uneven substrates
- Do not torch-apply membranes to ISOGARD HD and do not use hot asphalt with ISOGARD HD boards.