[quote=“ianto39”]I want to relocate a wall furnace so need to run a 4" vent through a flat tar & gravel roof. Would appreciate some advice on how to seal the job. I was planning to:
scrape roof clean of tar under the area to be covered by the flashing
seal flashing to vent using eg Black Jack
apply lap cement under the flashing and fix it with galv roofing nails
apply a good layer of sealant over the flashing & surrounding tar (after scraping away loose gravel). If so, is there a special kind of sealant needed to fix to tar (would Henry’s asphalt emulsion or StormPatch fibered sealant do the job)
Thanks for any help
-i[/quote]
[quote]make sure you use asphalt primer on roof membrane and metal flashing
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