Was in Q&B today looking at loft inulation rolls. They had top-up 200mm thick rolls to cover 5.5 sq m at £3 a go like this one. They also had top-up rolls of 170mm thick, covering 8 sq m at £15 like this one. The R value of the more expensive item is less too. Why would one opt for it over the cheaper one?
Whats the diff between the top-up rolls and those to act as a base layer - is it just thickness ie the base layer at 100mm brings it to the top of the joit, the top-up goes at right angles?
Whats the diff between the top-up rolls and those to act as a base layer - is it just thickness ie the base layer at 100mm brings it to the top of the joit, the top-up goes at right angles?