How so ? I am wondering whether I should get a 7kg or 13kg propane tank (or possibly larger) but since Ive never done so much felt before I am not sure which size is best suited for the job at hand.
This is one of those things, in my have-a-go roundtuit box. I bought a torch, adjustable regulator, and gas, decades ago - with the intention to have a go at some time, but never did, and never researched doing it....
Up to you. If the pipes on your torch are short I'd go with 7kg (a 13 might be a bit of a struggle up a ladder).
Def have an extinguisher next to you ready to go (not in the van), ideally have an assistant on fire watch inside the room you are roofing.
You can sort of do the maths - a quick Google shows that a roofing torch seems to go through 6-8kg per hour. So guestimate how long it'll take you - though torching a roof on is not something I'd just be having a go at. I'm pretty sure you'll need propane, it's all high pressure and I don't believe there is a HP system for butane.
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