ᐅ KS Masonry: Mineral Wool or Rigid Foam Insulation Boards?

Hello,
I have a question regarding a sand-lime brick masonry wall (without facing bricks). Could someone please explain the advantages and disadvantages of mineral wool boards versus rigid foam (polystyrene) boards? I want to avoid looking completely uninformed when I request quotes.

Mineral wool boards have a thermal conductivity class of WLG 040 or WLG 035. Compared to polystyrene boards, they offer much better vapor permeability. Polystyrene rigid foam boards EPS 15 are available in thermal conductivity classes WLG 040 and WLG 035. Perimeter insulation boards also have WLG 035. There are also polyurethane boards with a thermal conductivity class of WLS 028, but these are four times more expensive than polystyrene boards. Mineral wool boards cost about three times as much as EPS 15 polystyrene. In terms of handling, polystyrene is actually more user-friendly and cost-effective because it can be cut more quickly and accurately.

Okay, thanks, that’s enough for now. 🙂 Regards..

If I’m not mistaken, there are still differences in sound insulation between the various types of panels, so it’s worth researching this according to your needs. However, this is generally not very significant because the windows are usually the weak points.

EPS is flame-retardant, .....mineral fiber is non-combustible.

Mineral wool is non-combustible, EPS is flame-retardant.