SHOULD I I NSULATE I T?

EXTERIOR WALLS: YES

While it is possible to insulate inside brick walls if they have a cavity, in-wall insulation is even more important if you have a steelframe prefab house with hollow walls. Fibreglass insulation should be installed

ROOFS: YES

The best time is when the roof is being built, naturally, and it’s legally required in SA, so most houses will have insulation there. Spray-foam or spray-in cellulose fibres can easily be added later, if necessary. (