The Building-Envelope Supply House
Air-sealing, membranes, tapes, ventilation, and daylighting for high-performance construction — organized by application, backed by a spec desk that speaks assembly.
Why Architects & Builders Order Here
Shop by Application
Nine departments organized the way an assembly goes together — from the air barrier out to the daylight.
Featured Products
A cross-section of the shelf — current stock across membranes, tapes, ventilation, and daylighting.
Latest from the Field
Case studies, product guides, and building-science notes from the blog.
An Importer & Distributor Built Around the Assembly
NetZero Building Supply exists because a wall is a system, not a shopping list. We import and stock the components of the high-performance building envelope — weather-resistive barriers, smart vapor retarders, air-sealing tapes, adhesives and primers, penetration seals, skylights, heat-recovery ventilation, and thermal insulation — and we organize all of it by the job each product does in the assembly.
That is also how we sell it. Every department, every product page, and every conversation at the Spec Support Desk starts from the application: what layer is this, what does it connect to, and what sequence does it install in. When a question outgrows a product page, a human specialist reviews the detail — and our answers are general product-application guidance, never a substitute for your design professional of record.
Around the shelf we run a knowledge operation: on-demand courses, requested trainings for offices and crews, a video library, field events, and seven documented envelope systems. Learn the assembly, then buy exactly the components it needs — from one counter.
Knowledge Resources
The learning side of the supply house — free, and built for the people doing the work.
On-Demand Courses
Self-paced courses on air-sealing, moisture control, and ventilation fundamentals — watch on your schedule.
Request a Training
A live session for your office or crew, tuned to the assemblies you actually build. Lunch-and-learn to full-day formats.
Video Library
Installation sequences, product walk-throughs, and recorded talks — the visual companion to the catalog.
Events
Field days, counter demos, and conference appearances — meet the products and the people behind them.
FAQ
Straight answers on ordering, shipping, returns, and the most common application questions.
Spec Support Desk
Send the wall section or roof detail. A specialist reviews the application and recommends the components and sequence.
Envelope Systems
Seven documented assemblies — each one a complete, sequenced answer to a common building type.
Retrofit Systems
Masonry and wood-frame retrofit assemblies — how existing buildings get airtight and comfortable without losing their bones.
New-Build Framing Systems
Framed-wall, double-stud, and I-joist outrigger assemblies for new high-performance construction.
Commercial & Mass Timber
Metal-frame and mass-timber assemblies — the envelope logic of bigger buildings, documented layer by layer.
The Envelope, Monthly
New products, upcoming trainings, and one good building-science read per issue. No noise.
Build Tight. Ventilate Right.
Shop the catalog by application, or send the Spec Support Desk your detail and let us do the matching.
Ask the Spec Desk