If you think drilling a hole in a roof is a big deal, it isn't- watch it done sometime- drill hole, stick pipe through the hole, slide on the boot, a couple nails & a blob of sealant.

I've found that it's best to wood fill the holes, sand, then use a wood putty to match the color of the rest of your floor before putting the sealant/polyurethane on it.

The metal patches should be secured with sheet metal screws and the edges sealed with duct tape or some other sealant so that the air does not leak out from the patches.

In talking with the inspector he mentioned I could possibly remove the vinyl and put a few layers of sealant on the concrete then put ceramic tile over it.There doesn't appear to be any moisture damage per se but I'm hoping I don't lift up the vinyl and find mold.

However, certain products like sealants can be very cost effective and last a VERY long time.

When roof shingles get about half life, it's a good idea to seal the shingles with a clear roofing sealant to preserve them and the wood beneath. 

The following day I tried Miracle Sealants Heavy-Duty Acidic Cleaner.

If they touch, you just need to block the small gaps with felt or foam backer rod or temporary seasonal sealant. 

I plan on scraping crumbling, stained grout out of the base of my shower and replacing it with sealant this afternoon.

Hi BP,I’m looking for feedback on areoseal or other duct sealant experience and costs.