Flat Roof Insulation
A flat roof is characterized by having a pitch of less than 10 degrees and typically lacks a loft space and loft hatch.
Understanding Flat Roofs
Common in Mid-20th Century Properties: Popular additions to homes built between the 1950s and 1970s, often uninsulated or inadequately insulated.
Recent Membrane Replacement: Insulation is generally not added unless specifically requested during membrane replacement.
Methods of Insulation
Warm Roof
Optimal Insulation: Adds rigid insulation boards externally, covered with a waterproof membrane, preventing condensation and providing effective insulation.
Cold Roof
Common Approach: Places insulation between joist spaces supporting the roof, requiring at least a 50mm gap for adequate airflow. Not suitable for shallow joists.
Benefits and Considerations:
- Heat Loss Reduction: Significantly reduces heat loss, similar to loft insulation, depending on roof coverage area.
- Financial Savings: Potential savings on heating bills can be substantial post-insulation.