Hi everyone, I have a property that has been recently purchased. The
building is quite old, approximately 100 years old. The property has a
flat roof section measuring 30x40 feet. The roofing type is tar and
gravel.

During the recent spring season, rain has penetrated in certain
sections to leak into the commercial tenant below. I have had a couple
roofing specialists come in, and all have recommended on re-roofing
with a torch on roof. Now that can get quite expensive.

Since its only a couple holes causing the leaks, can i not:
1. Scrape up all the rocks
2. Plaster a good coat of new tar all over the roof
3. Re-spread all the rocks

to heal the problem? If so, are there any recommendations on types of
tar to do this? Any insght would be appreciated as I am unfamiliar
with roofing options.