It’s out! Firth HotEdge® slab edge insulation.

It's the secret to help make warmer, drier, healthier kiwi homes that a lucky few architects and builders have known for years - and now they're revealing to help your designs and builds achieve H1 compliance!

Firth HotEdge® products have been developed to improve the thermal performance of homes with concrete foundations in conjunction with any cladding system. It’s the smart way to close a building’s thermal envelope to reduce cold spots where moisture can form, and all without having to compromise the design integrity of your project.

Check out the range.

Firth’s HotEdge® range of proven foundation insulation solutions take another step forward in helping make warmer, drier and healthier homes easier to design and build.

View Range

Easily calculate and design your slab foundation insulation.

These free resources are available to make designing and building warmer, healthier Kiwi homes so much easier.

Online R-Value Calculator

Calculate an H1 R-value solution for your concrete
foundation with our HotEdge R-Value Calculator

R-Value Calculator

Design with Wafflesuite™  

Design RibRaft X-Pod® foundations for complex soil
types and calculate a custom thermal solution with Wafflesuite™