Siplast Paraboard™ HD and HD Pro are high-performance asphaltic panels designed to be used as both the coverboard and base membrane layer in a modified bitumen roofing system. Both panels are comprised of a high density closed cell polyisocyanurate foam core with a black or white surfaced SBS- modified bitumen base sheet with polyester reinforcement laminated on top. Paraboard™ panels have an exceptionally high R-value of 2.5 and they also meet the requirements of ASTM D3273 for resistance to mold growth.*

Paraboard™ HD consists of a base sheet coated with an SBS-modified bitumen and surfaced with a silica parting agent.

Paraboard™ HD Pro consists of a base sheet coated with SBS modified bitumen, then surfaced with a proprietary Syntan® acrylic coating.

Paraboard™ panels help save on time and labor, by eliminating the steps required for individual adhesion of roof components below the cap sheet membrane. With certain applications, the panels can be used for temporary repairs on damaged roofs, or with new construction projects before the final roof assembly can be installed, allowing interior work to get started before the completed roof is ready.

The SBS-modified bitumen membrane provides durability and waterproofing protection, and Paraboard™ panels are backed by Siplast’s partnership and stringent quality control.

Approvals:

• CSA A123.23-15 Type B, Grade 3
• ASTM D6164 Type 1, Grade S
• ASTM C1289 Type II - Class 4, Grade 1 (80psi min)
• ASTM D3273 for mold resistance
• FM approved, as a component of a Class 1-SH hail rated assembly
• Classified by UL in accordance with ANSI/UL 790