I recently started sealing the outside bottom of the tubs with silicone, in other words where the tub meets the floor and a little way down the adjacent walls.

Undo showers and seal cracks in tile groutRegular use of bathroom and kitchen surfaces causes cracks and loosening of tiles.

When you find your roofline entry points, seal them up when your rodents are most likely to be out looking for food.

Then coated the wall with a good sealing, and then from inside also gave a temp fix to the cracks.

We also own buildings on the same streets, but when we acquire one of these old gems, we gut the interior, insulate the walls to R20 or better (space is sometimes a factor) and air seal, replace windows and doors and put R50+ of insulation in the attic.  

This is not a last minute “Oh maybe I should see what others….”It’s more of… That feeling you get in the last few conversations before you seal the deal…. that make you second guess …..

You have to remember two things about skylights: first, you have created a hole in the roof that otherwise wouldn't be there, so as Chris mentioned it takes super precaution to seal it up.

Let the tenant seal their own fate by talking themselves into a judgment.

If you could not remove all affected wood in the subfloor - sometimes not possible, if strong urine/fecal matter made it to joists - you should have sealed everything which could have been done in several ways - polyurethane everything; poly vapor barrier; painting & 1/4" subfloor on top of old floor; etc.2.

Or is it redundant & the shellac should sufficiently seal in the tar/tobacco smell?