Air gap with trusses in the wrong direction.

[Okuma]

I am going to convert a carport into a garage. This raises some tricky questions, the roof is almost flat and the 45x220 rafters run in the wrong direction for the air gap. How do you build a sensible air gap that ventilates well? The fire protection is the next question, do I need a fire-rated door, etc.

Best regards, Jimmy

 

[Johan Gunverth]

You usually have to drill five billion 20mm holes in the top of the ceiling beams so the air can move in the right direction. Because you do have a possible opening to the outside somewhere?

 

[Okuma]

That's how I've done it in the storage part of the carport, there is a way out. But I thought there was a more high-tech solution.