If you’re focusing on attic or roof insulation, going for 200mm insulation is actually a very strong and future-proof choice because it significantly improves thermal performance. I was looking into this myself and found cheap 200mm insulation while researching different options, and it explains how this thickness creates a much deeper thermal barrier that slows down heat loss much more effectively. In fact, 200mm insulation is often used in lofts and roofs where high energy efficiency is required, since the increased depth helps trap more air and reduces heat transfer across large surfaces.

That makes a lot of sense, especially since I’m trying to reduce long-term heating costs and improve overall comfort in the house. Even if installation takes a bit more effort, it seems like 200mm insulation is a smart investment because it keeps temperatures more stable and makes the home much more energy efficient over time.