Help/Advice on Existing Cavity Wall Insulation

adzy77

Hi,

Just looking for a bit of advice on Cavity Wall Insulation as a whole and for my specific installation please before I make any next steps.

We have only been in our home for 18 months and never been convinced that we had wall insulation as our house can get quite cold at times. Just called British Gas regarding their free insulation and they checked and could see that I already had it. After a quick call to CIGA they said they had the guarantee details and would update it to my name and send it out today and the company who did it was Miller Pattison.

What sort of results should I expect to see from cavity wall insulation? Should our house ever drop as low as 13/14 degrees C in between the CH going off at night and the next morning (19 degrees when on)?

We are detached and one of our side walls is close up to next doors extension (still enough room to walk down though), would this have stopped them from insulating that side of our house? All rooms in the house bar the 3rd bedroom and bathroom use that outside wall and its our living room and bedroom that can get quite cold once the heating is off.

I have details of the company who did the work in 2011 and looks like i have a 25 year guarantee after speaking to CIGA but before i call the company and ask them to come out and have a look I just want to check that im not expecting too much from the insulation? And if i was to call them are there any specifc things i should be saying?

thanks

JJ_Egan

Should our house ever drop as low as 13/14 degrees C in between the CH going off at night and the next morning (19 degrees when on)

YES

MoneyMate

Usually we get a temperature difference of about 8 to 10 degrees between inside and outside with no heating on overnight, eg/ in 20, out 10.

Carbon bead insulation. A rated double glazing. and loft insulation in house.

Smiley_Dan

One thing to do would be to do a thermal imaging survey. You can sometimes hire the cameras cheap from local transition groups, hire it yourself (£100-200 for a week or so) or buy your own if you have a smartphone (Seek Thermal, Flir ONE). Wait till it's cold out (no warmer than 5C), heat the house to a uniform temperature then inspect the walls externally.

While the CWI might be at fault there are a LOT of places heat could be lost. Furthermore, depending on your wall construction and house layout the internal bricks could well bridge to outside.