Where’s the job?

Overview

• Installing insulation along roof rafters ensures a well-regulated attic temperature and reduced energy loss.

• Skill level: 3 / 5 (accurate measurements and secure fixing are required, though it is less complex than major structural alterations).

• Typical duration: 1 – 2 days depending on the size of the roof and complexity of the rafter layout.

Safety First

• Wear safety glasses, gloves and a dust mask to protect against insulation particles.

• Use a sturdy ladder and, if working at height, consider a safety harness.

• Confirm that the insulation material meets fire safety and building regulations.

• Avoid over-compressing insulation to maintain its thermal efficiency.

Tools & Materials

Step-by-Step

1. Measure the rafter spacing and determine the size and type of insulation required.

2. Prepare the workspace by clearing debris and ensuring good access to the roof structure.

3. Cut the insulation material to the correct dimensions for a snug fit between the rafters.

4. Insert the insulation between rafters ensuring there are no gaps; use mix-and-match techniques if necessary.

5. Install a vapour barrier over the insulation to prevent moisture build-up where required.

6. Secure the insulation with appropriate fixings, ensuring it remains in place over time.

7. Conduct a final inspection to ensure even coverage and that all safety and building guidelines have been met.

Completion Checks

• Insulation is evenly installed with no visible gaps between rafters.

• All insulation is securely fixed and covered by the vapour barrier if required.

• The installation meets building code standards and improves the energy efficiency of the home.

• A final check confirms that all areas are properly insulated and safe for long-term use.

When to Call a Pro Instead

If the roof structure requires additional repairs, or if there is uncertainty about insulation requirements and building code compliance, seek the expertise of a professional insulation contractor.