The tenant complained the when it rained, her window leaked. The landlord suggested she shut and latch her window but after sufficient complaint sent us to take a look. Yup… appeared to be some water damage to wall and window sill but no obvious reason from the inside there should be a leak.
Aha or Eureka, depending on one’s proclivity…the downspout was so tight agin the window trim there was no room to renew the caulking and over time the caulking failed, the wood failed and water went its way…part of that way being inside.
Back inside we removed wall board to see the damage extent and found mold (fortunately not of a deadly variety), rot and general degradation of the wall.
Thinking it useless to do the repair without fixing the cause we called the condo manager to ask if we could repair the outside and were informed that we were not, don’t touch it, and it’s probably the tenant’s fault anyway. She runs her motorcycle too loud. With little else to do, we covered the hole with black plastic and left the cure to the gods of the condo association.
And lo, the gods of the condo association and within days sent a crew who replaced the exterior damaged wood, re-caulked, sealed, painted and recited incantations to placate the water gods sufficiently that even with a well aimed, city pressure hose we could not get water to penetrate and went on with our repairs.
We replaced all wood tetched with fungus, sprayed a fungicide just in case, added new insulation, new wallboard and taped and mudded the joint. Took a day to dry so we could come back and sand and re-mud and a day later for the final touch of sanding and coats of paint and all is well in condo world.