Cavi-Mate is a robust window installation system ideal for the new build market. Manufactured from high quality PVC-U, it is a window former, locator and cavity closer which enables window frames to be installed quickly, easily maintaining a square finish.

Cavi-Mate can be supplied in kit form utilising simple purpose-designed corner cleats ensuring simple user friendly on-site assembly. Cavi-Mate can be used in conjunction with timber or PVC window systems and is also available in a fire rated version – we even offer a free take off service.


This product is suitable for masonry walls and offers the following major benefits:

  • Labour Savings
  • Minimised Waste
  • Meets Building Regulations Minimal Thermal Resistance

Cavi-Mate has been independently tested and certified to the latest Industry Standards, including BDA Kiwa certificate of Agrement.

With product specification, project support, U-value or condensation risk calculations, we at YBS Insulation believe we offer the highest level of support to all of our customers.

Get in touch with our professional team today if you’d like to discuss your insulation needs or if you’d like to order Cavi-Mate.