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House Wrap for Multifamily & Mid-Rise Construction
Multifamily and mid-rise construction introduce WRB complexities that single-family builders never encounter. You're dealing with Type III or Type V construction assemblies, NFPA 285 fire testing requirements, air barrier continuity across multiple floor lines, balcony penetrations, and building envelope consulting firms scrutinizing every detail. The "wrap it and side it" approach from production housing doesn't [...]
House Wrap Perm Ratings Explained: Why Higher Isn’t Always Better
"Get the most breathable house wrap you can find" is advice that gets repeated in forums, sales pitches, and even by well-meaning building inspectors. But vapor permeability isn't a "more is better" spec. A house wrap with a 60-perm rating isn't automatically superior to one rated at 15 perms. In fact, depending on your climate [...]
ASTM E2178 Air Permeance Testing for House Wrap
When energy codes tightened in the 2000s, "air barrier" went from a theoretical concept to a line-item code requirement. The International Energy Conservation Code (IECC) now mandates a continuous air barrier in all climate zones, and for many projects, the house wrap is expected to serve that function. But not all house wraps qualify. ASTM [...]
Woven vs Non-Woven House Wrap: Performance Testing & Data
When spec'ing water-resistive barriers for production builds or custom projects, one of the first forks in the road is woven versus non-woven house wrap. Both formats dominate the market, but they're engineered differently and perform differently under real-world stress. This isn't a subjective debate — ASTM testing provides objective data on tear strength, water resistance, [...]
Spray Foam Adhesion Failures: Causes, Prevention & Remediation
Few things are more frustrating — or expensive — than discovering spray foam that won't stick. You've prepped the job, set up the rig, sprayed the cavity, and everything looked good at installation. Then, days or weeks later, you get the call: the foam is peeling off the substrate, sagging in the cavity, or pulling [...]
Equipment & Rig Requirements for Drum-Fed Spray Foam Systems
If you're considering moving from disposable spray foam kits to a professional 55-gallon drum system — or you're starting a spray foam insulation business from scratch — you need to understand the equipment investment and operational requirements before you place your first material order. Running drum-fed spray polyurethane foam (SPF) isn't just about buying a [...]
Spray Foam for Roofing: SPF Roof Systems Guide
When most contractors think "spray foam," they picture wall cavities and attic insulation. But spray polyurethane foam is also a proven commercial roofing system — not just an add-on insulation layer, but a fully integrated roof membrane and insulation assembly. SPF roofing has been protecting flat and low-slope roofs for over 40 years, and when [...]
Ignition Barrier vs Thermal Barrier: Code Requirements for Spray Foam
Ask any spray foam installer what tripped them up on their first inspection, and half will say "the thermal barrier requirement." It's the most misunderstood — and most frequently violated — code provision for spray polyurethane foam insulation. The confusion stems from two distinct fire-safety standards in the International Building Code (IBC) and International Residential [...]
Spray Foam & Building Code: IRC/IBC Thermal Requirements by Climate Zone
If you've ever walked a job where the inspector red-tagged spray foam for insufficient R-value, you know: guessing at code compliance doesn't fly. The International Residential Code (IRC) and International Energy Conservation Code (IECC) set prescriptive R-value minimums by climate zone — and spray polyurethane foam (SPF) installers need to hit those targets without over-spraying [...]