Bigger ones might be venting kitchen fans.
Things on top of roofs.
What are those things on the roof.
A composite decking made of solid materials.
Assuming you mean big commercial or apartment buildings they might be air conditioning units electrical boxes water tanks or the tops of elevator shafts.
Unlike box vents which are square off ridge vents are usually much longer and thinner.
These vents are static vents that are placed over holes in the roof close to the roof ridge.
Parts of a roof decking or sheathing roof edge or eaves edge attic saddle ridge valley underlay membrane eaves membrane underlay membrane drip edge roof vents deflector plumbing vent flashing joint covers shingles.
The pipes are probably venting the toilets.
7 things to know before choosing a metal roof if your current roof is the root of your headache and maybe even a long list of costly home repairs consider these metal roofing pros and cons.
For residences it s usually just a c.
A horizontal timber or metal resting at the peak of the roof.
It resembles real wood and particularly strong and stable for bearing heavy load.