More photos from Weeks 2 and 3 - a comment on cavity walls

More photos from the build here. I may add a couple more during this week. The one below (I can't get it to display correctly, sorry) shows the existing cavity wall insulation, which has become saturated due to water penetration from driving rain (we believe).

Exposed cavity

 We are planning to suck out all the existing insulation with a super powerful, industrial vacuum cleaner. Although the cavity will only be providing a small portion of the total insulative value of the new wall, we want to minimise the risk of gaps, which could allow air movement within the wall. It this happened, the U-value would be badly compromised. The replacement insulation (Instabead Graphite K32) has a significantly lower claimed conductivity value (0.033W/mK) than the rockwool (0.045W/mK).

Week One photos

I've uploaded some photos of this week's activity here.

Removing all the ceilings has underlined what a big task it will be to make airtight all the junctions with the existing ceiling joists on two floors. The plastering will go up around and between the joists with additional work using Pro Clima airtightness products around each joist.