Can RV AC Unit Install on Sloped Roof

Updated 09/26/2025 | Published 04/30/2025

Question:

Can you mount it to a roof that has a 1 inch slope? Oh my concession trailer or does it have to have a level block out?

asked by: Marcus S

Expert Reply:

Hey Marcus, so RV AC units need to sit as close to level as possible to ensure that the drains can function properly as well as make sure the oil in the unit can get everywhere it needs to within the AC. Normally the acceptable out of level range is up to 5 degrees either way and you'll be fine. Looking at your picture there's a pretty good chance you are fine but I would grab a level and put it on there and see exactly the level.

Your smart phone might have a level on it as well that you can set on the roof and it will show you degrees out of level.

expert reply by: Jameson C

Jameson C.

9/26/2025

Hey Marcus, did you get a chance to check the slope of your concession trailer's roof with a level? I'm curious to know if it worked out for you because it could help others in a similar situation.