The loft is one of the biggest areas for heat loss in most homes, so it’s worth taking the time to get the insulation right rather than treating it as an afterthought.
Don’t skimp on quality
It’s tempting to go for the cheapest insulation available, but this is one area where you really do get what you pay for. Lower grade materials often have poorer thermal performance, settle or compact over time, and may need topping up or replacing sooner than a higher quality product. Investing a bit more upfront usually pays off through better long-term performance and fewer repeat costs.
Get the depth right
Thorough insulation means laying it to the recommended depth, typically around 270mm for mineral wool insulation, and making sure it’s laid evenly across the whole loft space without gaps, compressed areas, or thin patches. Even small gaps can create cold spots that undermine the effectiveness of the insulation as a whole.
Think about how you use the space
Before insulating, it’s worth considering what the loft is actually used for. If you’re using it purely for storage, you may be tempted to board over the insulation so you can stack boxes on top. However, boarding directly over standard insulation can compress it, reducing its effectiveness. If storage is a priority, it’s worth looking at raised loft boarding systems, which sit above the insulation on legs or spacers, allowing the insulation to stay at full depth underneath while still giving you a usable floor.
A balance worth striking
Ultimately, a well-insulated loft, done properly and with the right materials, can make a significant difference to how much heat your home retains, and how much you spend keeping it warm. Getting it right the first time, rather than opting for the cheapest fix, tends to be the more cost effective choice in the long run.
