Airtight White Big Boy Bundle

The Airtight White Big Boy Bundle brings together our VOC-free, water-based Airtight White vapour control membrane in one convenient pack — everything you need to create a continuous, paintable airtight and vapour control layer across walls, floors and ceilings. Ideal for new build and retrofit projects, including areas where the airtight layer is left on show. Related Guides Helpful guides related to this product: What Is a Vapour Control Layer? | VCL Explained My Builder Forgot the Vapour Control Layer? Here’s How to Fix It What is Airtightness (and Why It Matters for Net Zero Buildings)