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Old 08-09-2019, 07:14 AM
JeeUm is offline
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Insulating trailer roof?

What are you guys using to insulate your trailer roofs? Trying to stop some of the heat buildup, was in mine the other day and was shocked at how hot it got.
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Old 08-09-2019, 08:19 AM
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Originally Posted by JeeUm View Post
What are you guys using to insulate your trailer roofs? Trying to stop some of the heat buildup, was in mine the other day and was shocked at how hot it got.
Nothing. I have a dark blue trailer and even sitting closed up in direct sunlight it only gets about 8-10F hotter than outside temps. I have a temp gauge in my trailer to monitor temps. Once I open both doors and a breeze goes through, it equalizes pretty quick.
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Old 08-09-2019, 08:37 AM
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I spray glued the silver coated bubble insulation that comes in a roll from Lowe's/home Depot...cut to length and stick up. Helped a lot , especially when trailer is parked and closed up. I keep my fuel jugs inside and much less heat/pressure build up after insulation.
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Old 08-09-2019, 09:21 AM
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You need to reflect as much heat away to start with. If you have not already done so, paint your roof with white roof coat. This will cut down greatly on the remaining heat you are dealing with and is way less costly and only takes a few minutes to do. Then you can evaluate the residual heat you are dealing with and go from there.
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Old 08-09-2019, 09:38 AM
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Originally Posted by MarksHangar View Post
You need to reflect as much heat away to start with. If you have not already done so, paint your roof with white roof coat. This will cut down greatly on the remaining heat you are dealing with and is way less costly and only takes a few minutes to do. Then you can evaluate the residual heat you are dealing with and go from there.
I would agree to reflect as much direct sunlight as possible. But air temp will always win the heat battle. That air temp is heating up that steel or aluminum trailer and will absorb it extremely fast. Trailer walls are just not thick enough to add enough insulation to really slow down the interior heat absorbsion. Our specialty vehicles I manage are $300,000 each and built out of aluminum. They have R5 insulation in the walls and placed there during the building process. Much better than anyone here can do and they will heat up just like my airplane trailer in the hot sun and get as cold in the winter. The insulation does help a little for the interior climate control but you can only do so much in a 1" wall cavity. During the summer we use 30,000,BTU A/C units (at least how the manufacturer rates them) and they work hard to bring temps down to high 70's on a 85 or higher day with high sunload.
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Old 08-09-2019, 10:42 AM
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I could not stand the idea of all the electronics and batteries getting that hot when I bought the 18' trailer. So I placed the 1" insulation board in mine and installed an a/c in the side door. All I was looking to do was keep the temps near 80° or less if possible. The little window unit I installed in the door does a great job of keeping it at 78°, but, I also park it in a shaded area. It is nice to be able to go in it on the hottest of days and hook up chargers or do minor work on one without breaking a sweat.
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Old 08-09-2019, 12:40 PM
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I lined the inside roof with the 1” styrofoam insulation sheets from Lowe’s. This made a huge difference...it eliminated the radiant heat felt while being in the trailer.
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Old 08-10-2019, 08:20 AM
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Thanks, just looking to knock the temp down a little.
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Old 08-10-2019, 08:54 AM
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Was looking to do the same.....I painted rubberized roof coating with UV protection and it actually pretty significantly reduced my temps.

Lowes or home depot sell it!
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Old 08-10-2019, 09:28 AM
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I have a 6x12 V nose...I coated the outside roof with elastomeric white, then I went inside and removed all the side wood and installed 1 in. foam insulation with aluminum backing, put the wood back in (the way I wanted)
then used the rest of the 1" insulation to do the inside of the roof too.

Made a big difference here in central Florida and the trailer is in the sun for most of the day. My planes have stayed in the trailer all year around for 6 years now and no problems.

Ed
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Old 08-10-2019, 11:25 AM
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I put Eternabond seam tape on the seams of my 6'x14' trailer roof to prevent any leaks.....do I remove it and put the elastomeric coating on or coat the 'bare' roof sections and leave the tape "as-is"?
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Old 08-10-2019, 11:33 AM
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If the tape is a good quailty not known to lift, paint over it. If it ever did lift repatch in small spots as needed.
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Old 08-10-2019, 03:20 PM
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If the tape is a good quailty not known to lift, paint over it. If it ever did lift repatch in small spots as needed.
It's been on for roughly 8 years and no lifting to date....appreciate your response
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Old 08-19-2019, 06:39 PM
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I have a RC club member friend who owns a Insulation company.
He Spray foamed my Trailer for me. It’s Closed cell foam and it has really helped.
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Old 08-20-2019, 07:46 AM
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Reflectix insulation is the best for me and easy to install and inexpensive
I then installed 12’ strips of LEDs
At the field this week outside temp was 90 inside trailer was very nice.
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