Laying underfloor insulation: part 2 - fitting the insulation
DIY expert Craig Phillips demonstrates how to install under floor insulation. This easy to follow step by step guide shows how to add felt and insulation filler.
Step 1: Staple the felt in place
Staple breathable roof felt onto the floor joists, creating equal swags of felting between them which will be filled later.
Step 2: Seal any gaps
Seal up all the gaps using tape to ensure all spaces where a draught could get in through the floorboards are sealed up.
Step 3: Fill with insulation
Fill the gaps between the joists with the light weight insulation, spreading it out, ensuring there is a minimum of 4inches of insulation in each gap.
Don't miss: Part 1 - how to take up floorboards.