EWI + yellow rockwool CWI

[MikeGrahamT21]

13 hours ago, Innes- said:

Thanks for all the helpful replies r.e. insulating the dpc.

 

At the rear of the house we have a concrete plinth/step which extends out from the back door. Theres also a reinforced concrete flat roof above linking the house on to a small outbuilding. Will the concrete act as a cold bridge and if so is it possible to calculate how much the overall effect of EWI will be compromised if I leave them in place?

As long as your cavity is filled with insulation where the step is, there will be a small bridge where your wall ties are, but its likely to be a very very small area.