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In the complex ecosystem of modern supply chains, trust is currency. For a customer—whether a multinational corporation sourcing components or a local business hiring a logistics provider—that trust must be backed by evidence. This is where ISO 9001 certification enters the equation. Far from being just a “certificate on the wall,” ISO 9001 serves as […]
I have a 4.5/12 open gable roof section that is timberframe truss supported with 2×6 t&g decking (exposed on interior). I am putting 6″ of Comfortboard 80 above this, 2×4 vertical purlins on the flat, then 5/8 sheething, then standing seam metal roof. After reading a zilli0n posts and details here there still seems to […]
Morning all.I have been renovating a 1970s addition on my house from the inside. Zone 4 with damp winters. Current assembly is cedar siding, tar paper (probably #15), horizontal shiplap, tar paper (again), 2×4 studs with R7, vapour barrier, drywall. From the inside, I’m replacing the r7 with r14, adding 1.5″ EPS (on stud faces) […]
I’m putting an addition on a house that has a “dropped” subfloor. The original floor joists do not sit on the stub wall. The exterior wall sill plate sits directly on the stub wall. The subfloor assembly is entirely supported on interior piers, and the top of the floor joists is flush with the top […]
Musings of an Energy Nerd Researchers have developed new ways to use AeroBarrier to seal building envelope leaks By Martin Holladay | February 6, 2026 A researcher setting up an AeroBarrier emitter in a crawlspace. When the occupied area of the house is depressurized with a blower door, aerosoized sealant will be drawn into the […]
You need to air seal the barrier between the interior and exterior air spaces, and that barrier defines the building envelope. The barrier can be the uppermost level drywall (most common), which is often also the “floor” of the attic under the attic floor joists. If you also have a layer of plywood or OSB […]