Installation guide for Stego Wrap Vapor Barrier, an ASTM E‑1745 Class A‑B‑C compliant vapor barrier with low permeance and puncture resistance.
Stego Wrap Vapor Barrier is an ASTM E 1745 Class A vapor barrier (Below 0.01 perms) made from prime virgin resins for long‑term low permeance, tear and puncture resistance, and protection against mold and radon. The product is supplied in 15‑mil rolls (14 ft × 140 ft) weighing 140 lb.
The guide provides step‑by‑step installation instructions, including unrolling, overlapping seams 6 inches, sealing with Stego Tape or Mastic, and special procedures for under‑slab, crawl‑space, and pipe penetrations. It also outlines repair methods for damaged sections and includes warranty and safety information.
| Permeance (Class A) | 0.0084 perms |
|---|---|
| Water Vapor Transmission Rate (WVTR) | 0.0035 |
| Puncture Resistance | 2200 g (Method B) |
| Tensile Strength | 45.0 lbf/in. |
| Thickness | 15 mils |
| Roll Dimensions | 14 ft × 140 ft |
| Roll Weight | 140 lb |
Seams should be overlapped by 6 inches and taped with Stego Tape.