You are reading a single comment by @NotThamesWater and its replies.
Click here to read the full conversation.
-
Why the 2" gap in the end?
Because
Condensation will always be a concern between the colder exterior wall and the warm interior boarding.
Airflow stops this. It's the same principle for insulating a cold roof.
I guess breathable insulation might mitigate any condensation problems, but I'm (lacking any real world experience of it) somewhat circumspect.
NotThamesWater
Why the 2" gap in the end? What do you think of the argument that removing the gap gives the house the ability to dry out the exterior wall (even at 100mm IWI)?!
We're a terrace property and I'm wondering if front-to-back airflow in the roof and under the ground floor would be adequate.