Bay Building Supplies Inc is your trusted building products supplier, offering a full range of Division 7 insulation and moisture protection systems for commercial buildings, residential homes, and green construction projects. Our product line includes high-performance air barriers, vapor barriers, waterproofing membranes, and thermal insulation designed to meet modern energy efficiency standards and building codes. Whether you’re working on a new build or a retrofit, our team is here to help you build smarter with reliable, sustainable solutions.
Division 7
Thermal Protection
- Building Insulation
- Extruded Polystyrene (XPS)
- Expanded Polystyrene (EPS)
- Polyisocyanurate
- SPF Insulation (Spray Foam)
- Fiberglass
- Residential /Commercial Insulation
- MBI (Metal Building Insulation)
- Loose-fill/Blowing
- Mineral Wool
- AFB & Safing
- Curtainwall
- Cellulose
- Roof and Deck Insulation
- Cold Storage Insulation
- Vapor Retarder
- Air Barrier
- Sheet Applied
- Fluid-Applied
- Air & Vapor barrier
- Vapor Permeable(VP)
- Air Infiltration Barriers
- Flexible Flashing
- Foundation Liner (FRP) / Foundation Coatings & Panels
- Firestopping
Dampproofing And Waterproofing
- Sheet Waterproofing
- Fluid-Applied Waterproofing
- Bentonite Waterproofing