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How to make air gap for roof insulation?

johney · 2016-11-20 21:05:15

Hello folks, I bought a renovated bungalow a while back. The attic had just been spray foamed by previous owner. On very warm summer days the insulation would weep and drops of water would appear. After investigation I have found that there is a card about 1 inch from the felt so leaving a 1 inch air gap between foam and…

20-11-2016 9:05pm

#1

johney

Banned (with Prison Access) Posts: 88 ✭✭

Join Date: July 2007

Posts: 55

Hello folks,

I bought a renovated bungalow a while back. The attic had just been spray foamed by previous owner. On very warm summer days the insulation would weep and drops of water would appear. After investigation I have found that there is a card about 1 inch from the felt so leaving a 1 inch air gap between foam and felt. However, as the house is a very old bungalow type, there is no soffit, just a pvc facia nailed to the wooden facia board, which is flush with the external wall. The facia is pushed up very tight against the slates with no air gap. In short, there is no air getting in anywhere. How to remedy this? Was thinking of boring a few holes through the fascia just under the slates, but this may allow water to enter. Anyone any ideas? Many thanks

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