Class PB Exterior Insulation and Finish System providing
moisture barrier and optional secondary air/weather barrier
FlexWall is a non-structural Class PB EIFS for use over a
variety of approved substrates including ASTM C1325 cement
boards such as PermaBase from National Gypsum, ASTM C1177
silicone core gypsum sheathing such as Dens-Glass Gold from
Georgia Pacific, Fiberock Aqua-Tough Sheathing, poured concrete,
unit masonry, ASTM C1396 gypsum sheathing, exposure 1 or exterior
grade plywood (Grade C-D or better), or exposure 1 OSB.
System upgrades can include the addition of a SonoWall
FT or FT-R as a secondary air and moisture barrier, high-impact
resistant reinforcing mesh, silicone enhanced textured finishes
to improve dirt pick up and mildew resistance, and tinted
primers to enhance final aesthetics.
New or retrofit commercial and institutional construction
such as hotels, hospitals, retail, schools, multi-family
apartments and condominiums, and government facilities.
FlexWall can be panelized to expedite year-round construction.
System Specification (PDF)
System Specification (Word)
Moisture Protection Barrier Guidelines for SonoWall
• FlexWall WM and FlexWall
System Details (PDF)
System Details (CAD)
2. SonoWall FT™ or FT-R™
3. Adhesive Ground Coat,
4. EPS board
5. Adhesive Ground Coat,
6. Strong 15 Mesh™ or High-
6. impact 20 (optional)
8. SonoWall finish coat