Steel or Timber Framed Properties Should Not Be Insulated with Cavity Wall Insulation
Steel and timber-framed houses should not be insulated with cavity wall insulation. This is why.
Both timber and steel need air circulation to prevent rot or corrosion. Many of us will live in houses that have suspended timber floors, and will be aware of the air bricks strategically laid at damp proof course height. These air bricks allow air to circulate underneath the floor joists preventing rot developing and keeping the timbers healthy.
The same practice is required inside the cavities of timber and steel-framed houses. Fully insulating the cavity with a retro blown cavity wall insulation product increases the risk of condensation forming and being trapped against the frame. With timber framing, this might lead to wood rot; with steel it will result in corrosion.
Proof then that some Cavity wall insulation installation companies don’t know what they are doing. Insulation has been fitted to timber framed properties to our knowledge as recently as April 2017.
We are also aware of steel framed properties on housing estates, where many house have had insulation fitted and some where the homeowner has already had the insulation removed.
Mortgage surveyors are becoming increasingly concerned about surveying timber or steel-framed properties and will put caveats in their reports to protect themselves. Mortgage lenders will not lend on a timber framed house that has had the cavity between the timber frame and the outer skin with thermal insulation.
If you live in a timber or steel-framed house and it has cavity wall insulation. You must get in touch with us now, we can help. Call 0161 674 9516.