Loft Insulation

ComicGeek

https://forums.moneysavingexpert.com/discussion/comment/82147704#Comment_82147704

It's not wrong, 10 years payback is completely realistic and might not be conservative enough in some cases. The heating usage is based on degree days heating calculations, and assumes that rooms are occupied with internal heat gains, and heated to 20 degrees throughout the heating season (when the outside base temperature is lower than 15.5 degrees). If bedrooms are only heated to 18 degrees (or heating turned off completely in bedrooms like my house) then the annual savings are going to be much lower, and the payback period extended.

Even the Energy Saving Trust website https://energysavingtrust.org.uk/advice/roof-and-loft-insulation/ states:

"If your current insulation is around 120mm thick, increasing to the 270mm (the minimum recommendation for new builds) could save you on your energy bills:

• £17 per year in Great Britain (GB)."

EST even quote £600 typical installation cost for this extra 120mm, so a whopping 35 year payback for that scenario. And also quote a typical lifespan of 40 years…

Section62

https://forums.moneysavingexpert.com/discussion/comment/82148777#Comment_82148777

And also quote a typical lifespan of 40 years…

Or only 10 years, according to those 'local energy advisor' folk who cold call us on a regular basis. 🙄

Swipe

https://forums.moneysavingexpert.com/discussion/comment/82148807#Comment_82148807

Those calls never get past the first few words when I answer