Cavalok BigBlok - Recycled PVC-U Cavity Closer

Recycled PVC-U cavity closer designed to meet the demand for closures in buildings with cavities 125–300 mm wide. Comprises a solid block of insulation (CFC/ HCFC free) making it ideal for low U-valve construction. With larger cavities being specified across new-build properties in order to meet stringent thermal efficiency regulations, BigBlok meets the demand for a simple slot-together system that quickly and cost-effectively closes off window and door openings of any size in any type of wall.

Features and benefits:

• Suitable for low U-valve construction
• Wide range of cavity sizes
• Fully approved by the BBA and NHBC
• Offers a Global Warming Potential (GWP) of less than five and an Ozone Depleting Potential (ODP) of zero
• Creates rigid bricklaying template and seals walls with cavities up to 300 mm, helping in meeting stringent thermal efficiency regulations
• Manufactured from 100% post-consumer recycled PVC-U – delivering a sustainable solution.
• Closes opening with continuous CFC/HCFC-free insulation – reducing U-values to prevent thermal bridging
• Quick and easy to fabricate and fit, with straight cuts and slot-together fitting
• Compatible with PVC-U, timber, steel windows and composite doors
• Tough and robust to withstand demanding site conditions
• Extensive range of fitting options to suit every building project