Apply Roofing Underlayment
At 0:35 in
Yes, the pitch is low. We know. 🤣..#build #framing #construction #deckdesign
What happens here
With the plywood decking fully installed, the next crucial step is to apply a roofing underlayment, which acts as a secondary barrier against water penetration. The video shows workers rolling out and securing a white, synthetic underlayment material across the entire roof deck. This material, identified as 'TITANIUM PSU 30' (a common self-adhering synthetic underlayment), provides an excellent waterproof layer and protects the plywood from moisture before the final roofing material is installed. The underlayment is carefully overlapped according to manufacturer specifications to ensure maximum protection.
Goal: Install a waterproof underlayment layer over the plywood decking
Tools and materials
- Staple Gun — Securing the underlayment to the plywood, especially at edges and seams
- Titanium PSU 30 Underlayment Titanium — Providing a waterproof and weather-resistant layer over the plywood deck
- Utility Knife — Cutting the underlayment to size and trimming edges
- Staples or Roofing Nails — Fastening the underlayment