Rigid foam insulation (continuous insulation, or CI) is required by IECC in most climate zones for commercial buildings and increasingly common in residential construction. Choosing between XPS, EPS, and polyiso isn't about which is "best"—it's about which meets performance requirements and delivers the lowest lifecycle cost for the specific application. Here's the technical comparison builders [...]
Energy codes are tightening. Blower door testing is now mandatory in most jurisdictions. For production builders and contractors, spray foam isn't just about R-value—it's about achieving verifiable air leakage compliance and delivering measurable energy cost reductions that justify the material premium. Here's what the data actually shows: real blower door test results, climate-specific energy savings, [...]
Spray foam pricing is opaque until you start running volume. Retail pricing means nothing when you're bidding production work. Here's the real cost structure for contractors buying in bulk, plus the labor and equipment overhead that determines your true installed cost per board foot. This isn't consumer pricing—these are the numbers for insulation contractors, production [...]
Most insulation contractors default to drum systems for good reason—they're the workhorse of spray foam application. But dismissing kits entirely leaves money on the table. The question isn't which is "better," it's which delivers the lowest installed cost per board foot for each job type. Here's the framework we use when bidding insulation work: kits [...]
Proper roof underlayment installation is critical for protecting your home from water intrusion and extending the lifespan of your roofing system. Whether you're a professional contractor or an experienced DIYer, this comprehensive guide covers everything you need to know about installing roof underlayment correctly. Tools and Materials Needed Before starting your underlayment installation, gather these [...]
When it comes to roofing felt underlayment, one of the most common questions contractors and homeowners face is whether to use 15 lb or 30 lb felt paper. While the choice might seem straightforward, understanding the real differences between these two options - and when each is appropriate - can save you time, money, and [...]
Choosing the right underlayment for asphalt shingles is one of the most critical decisions in roofing - yet it's often overlooked until a leak reveals the mistake. As contractors, we know that underlayment serves as the secondary water barrier that protects the roof deck when shingles fail, and proper selection directly impacts warranty coverage, code [...]
Not all roof underlayment is waterproof - and using it wrong can cause more damage than it prevents. Learn when waterproof underlayment is required and where water-resistant is better.
When choosing spray foam insulation for your project, understanding R-value per inch is critical. This measurement tells you exactly how much insulating power you get for every inch of thickness - and it varies dramatically between different types of spray foam. Whether you're insulating a 2x4 wall with limited cavity depth or a cathedral ceiling [...]
Complete guide to weather resistant barrier (WRB) requirements under IRC R703.2 and IBC. Covers ASTM testing standards, installation specs, and climate zone considerations.
