Continous wet Patches on Sill Above Cavity Dwarf Wall


Postby alstudio » Sat Sep 02, 2017 12:17 pm

I've done searches in forums but not seen anything that seems to address my issue.
I had a new conservatory with double glazing built on the existing dwarf walls last autumn. I love it ...BUT

The wet patches as shown in the image never go away. They are only in the one section of the window sill.

Inside the dwarf wall is a cavity in which there is a plastic membrane and is now also full of pink expandable foam.
Outside very close to the larger patch there are 2 bricks which are wet ...the others are dry.
I think the 2 issues are related but not sure how!.

Please does anyone have any ideas ?.


Many thanks in advance.
Attachments
conservatory window sill context.jpg
2 wet bricks.jpg
2 wet patches.jpg
alstudio
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