Cavity Wall Insulation Question

[PaulM-S]

My late 1990s built detached house is not very warm.

On checking the external walls, the tell-tale signs of cavity wall insulation are visible on three sides of the property, but only for a small area towards the front of the house on the fourth side.

The side of the house that does not appear to have cavity wall insulation is the external wall of an internal garage and dining room down stairs and two bedrooms upstairs.

Just wondering if anyone has seen anything similar and have any suggestions.

 

[23vc]

How are you identifying the signs of it being installed from the outside? If late 90s it should have it when built rather than retro fitted?

 

[robinbanks]

My late 1990s built detached house is not very warm.

First consider draughts from gaps and holes in the fabric of the building; this vintage should have insulation built in. A blower door test could be good to identify where your paid-for warm air escapes. Infrared cameras at night, cold outside, heating on and be another good diagnostic but be sure you understand how to interpret the images

Is the garage door insulated?


Can you find a relatively low impact way of looking into the cavity? Remove an extractor fan or upstairs windowsill etc

 

[^woody^]

How are you identifying the signs of it being installed from the outside? If late 90s it should have it when built rather than retro fitted?

Some builders used a post-build blown in system on their developments, others may have used insulating blocks and relied on a whole house u-value calculation which did not require additional wall insulation.

All retro fit installs should be recorded via a building regs notification.

 

[^woody^]

Have you lived there from new? Were the walls insulated retrospectively before you purchased?