Loft insulation is usually the simplest major improvement you can make.
We already had 100mm of insulation in our roof, which we immediately trebled to around 300mm, and it didn’t cost us a penny.
The government body for this in Hull is Warm Zone.
Natural options with lower embodied energy include Warmcel, from recycled newspaper. Sheep’s wool insulation is another alternative, but costs about 3 times as much.
If we had no insulation in our loft and installed just 100mm, it would have saved £300 a year. That means even if we bought the materials ourselves the cost would be paid back in bill savings in just a couple of months.
Loft Insulation increased from 100mm to 300mm
|U-value||improved from 0.31 to 0.11|
|Cost||Free- funded by WarmZone|
|Cost if you pay||£1.20 per square meter for mineral wool 100mm thick,
available at a subsidised price from diy stores
|Saving||£37 a year|
|Payback Time||Immediate if funded.
If paid for: 4 years