How to install partial fill cavity wall insulation

Guidance on how to install partial fill cavity wall insulation with Kingspan Kooltherm K108 Cavity Board. Looking for a slimmer cavity? See Kingspan Kooltherm K106 Cavity Board instead.

[@ChEm1cAlKeEn]

What about taping the joints!

[@rhd1337]

Can you use 75mm boards in 100mm cavity?

[@waqqasanwar1912]

I don't know if the double cost of this product compared to standard insulation really justifies the need for it.

[@Cheatersmasher82]

You forgot the tape on the inso joints but good vid.