Cutting in ridge vent
A few years back, my insurance was threatening to drop me if I didn't replace my 15 year old rolled roof eventhough I had two inspection reports saying my roof was solid and basically at half it's life span. I had a metal roof laid over top. At the time, I had massive oak trees that provided near full shade coverage, but the trees had to be removed from hurricane damage, and we got full sun. The metal roof came with a ridge vent cap, but bc I had such good shade, I elected not to pay the extra for them to cut it open. I have soffit and gable venting. But in the Florida summer with full sun, my attic space is cooking. What would be the best method of cutting open my ridge? I'm fairly used to cutting through shingles and roof decking in hvac to run ventilation out the roof in new construction, but I've never cut through this material specifically. I attempted last year, and the tar from the rolled roof liquified and made it impossible with my multi-tool and sawzaw. I made 2 cuts and stopped. I spoke with a roofer I did an hvac repair for and he said to buy a cheap circular saw blade and coat it with wd40 before a cut is made and between each cut, and to do it on a cool winter day... well, reddit, what do ya think?