Revisions log for question
What are those stains on the roof beams?
Revision 1
2022‑08‑02 15:12
Active REV1
Initial text
We are planning on doing interstitial insulation in our new construction starting this weekend, after the screed and plaster have been dry for a while. Now I've noticed stains on the subfloor and roof joists. Almost the entire attic is affected. Can anyone tell me what it is and how I can get rid of it?