Just read this. You may have radiant heat problem and not hot air being trapped under there. If you say you have ridge vents already there, (I cannot see them from your pic), then that should vent any hot air anyways.
Venting the heat out of the top of my arched exposed breezeway?
- Thread starter Pablo
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Just read this. You may have radiant heat problem and not hot air being trapped under there. If you say you have ridge vents already there, (I cannot see them from your pic), then that should vent any hot air anyways.
They are really skinny. Like less than 1/4" outlets
How many of them?
JTK
$100 Site Donor 2025
That looks really nice. Great build quality.
I don't know if there is a way to mitigate radiant heat from the sun, working it's way through the structure, other than build a ceiling with an air gap, then insulate and ventilate that space between the underside of the roof and the ceiling.
I don't know if there is a way to mitigate radiant heat from the sun, working it's way through the structure, other than build a ceiling with an air gap, then insulate and ventilate that space between the underside of the roof and the ceiling.
In cold Canada or hot climates, air flow is everything. You need to have air flowing from the bottom edge of the roof to the ridge and out. Each space between rafters needs to have an intake vent. Quick picture I did to show air entering the U shape and exiting the roof vent.
The radiant heat issue is solved by insulating below the airflow with a false ceiling.
The radiant heat issue is solved by insulating below the airflow with a false ceiling.
That is only for roofs that have an attic or space that's not open. This particular case it's all open, there is no need for anything at the bottom. And if the ridge vents run the entire length of the roof, that should be enough for any hot air to escape.
Since Pablo mentioned this space cools off rather quickly once the roof is in the shade, I believe this is radiant heat issue and not stagnant, hot air accumulating there.
At this point I think the most I will add are a couple fans pointing toward the hot side blowing upwards suspended from main beam
Right, but I still think it's a combo of both. Inadequate roof venting with the huge heat load and radiant heat issue.
Can you take better photos of the ridge vent?
This looks like the stuff I used.
https://www.homedepot.com/p/GAF-Cob...d-Plastic-Roll-Ridge-Vent-2056000CU/329616002
Owen Lucas
$100 Site Donor 2023
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1. Ceiling fan
2. See if an upward blowing floor fan will do anything, like a large one.
3. Maybe wall mounted fans, one blowing upwards and another one pulling downwards.
The point is to get some type of circulation. You could also wear a doo rag filled with ice or maybe a beanie cap or hoodie.
2. See if an upward blowing floor fan will do anything, like a large one.
3. Maybe wall mounted fans, one blowing upwards and another one pulling downwards.
The point is to get some type of circulation. You could also wear a doo rag filled with ice or maybe a beanie cap or hoodie.
Definitely helps!
It may just be the angle of your photo, but I don't see any airflow opening to the ridge vent created by cutting out ~3" of the roof sheathing on both sides of the center ridge board as shown at the 4 minute mark of the video below.
Got up to 95°F today- 4 portable fans blowing up made a big difference
I ordered a hanging fan, arrives Thursday. Will hang from north side mid high or so aimed up across pointed south
I should take some temperature measurements
I ordered a hanging fan, arrives Thursday. Will hang from north side mid high or so aimed up across pointed south
I should take some temperature measurements
UPS dude dropped off new fan
When the boss gets back from the pool boy overnighter on his yacht I’ll have her hang it
When the boss gets back from the pool boy overnighter on his yacht I’ll have her hang it
Fan is installed. Quite nice! Strong silent type. Unlike the pool boy.
Photos coming
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