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Old 05-24-2022, 08:01 AM   #1
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Insulation in Cabinets

I have a tiffin allegro 45 LP 2014 . has anybody put some insulation inside their cabinets to help cut down the heat from outside and if so what type ?
would think there is an adhesive backed type out there, but so many to choose from any ideas would help.
the cabinet walls get very hot in the summer time here in florida and anything in them gets hot also (food, liquor bottles, etc)

thanks for your help mike p
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Old 05-24-2022, 08:10 AM   #2
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I've seen where people have used Reflectix. https://www.lowes.com/search?searchTerm=reflectix

I have never done it, but they cut the size a little larger than where you are placing it and that holds it in the cabinet.
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Old 05-24-2022, 08:33 AM   #3
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We put Reflectix in cabinets in our '19 Phaeton 40IH before we moved into RV. We measured each cabinet and cut reflectix about 1/2" more in each dimension and just pressed in to place. Some people use staples; you could also use velcro in a couple of places. From what I have measured, cabinets are 10-15 deg cooler on a hot, sunny day.
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Old 05-24-2022, 08:37 AM   #4
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I wanted polyisocyanurate not polystyrene which burns faster and more toxic. Lined cabinet tops and back wall. Reflecting towards outside. I cut pieces slightly larger and wedged in, no adhesive.
This is what we used

RMAX
Pro Select R-Matte Plus-3, 3/4 in. x 4 ft. x 8 ft. R-5.0 Foam Insulation Board
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Old 05-24-2022, 08:44 AM   #5
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Quote:
Originally Posted by B52Rnav View Post
We put Reflectix in cabinets in our '19 Phaeton 40IH before we moved into RV. We measured each cabinet and cut reflectix about 1/2" more in each dimension and just pressed in to place. Some people use staples; you could also use velcro in a couple of places. From what I have measured, cabinets are 10-15 deg cooler on a hot, sunny day.
Did you just do the back wall or the ceiling of the cabinets as well? I don't really see how it would stay up on the ceiling very well.
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Old 05-24-2022, 10:53 AM   #6
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We also did the reflex stuff last summer, cut a tad larger than the actual measurement needed and it just stays in place. We only did the back of the cabintes, every cabinet in the Bus. Yes it did help, I don't remember the exact decline on temps now, but I think it was between 15 to 20 degrees? I know when you put your hand into the cabinet to get something it no longer comes out hot. I bought a roll of that reflex stuff from lowes for about $20 bucks and used every bit of that roll. Hardest part was to empty each cabinet, man we carry a lot of useless stuff...(big grin)
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Old 05-24-2022, 12:27 PM   #7
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I wish they made the Reflectix in brown. I want to do this mod, but hate to open the cabinet and see silver. I guess the trick is to fill the cabinet so full you don't see the back, lol.
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Old 05-24-2022, 12:55 PM   #8
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thanks all going to keep looking to see if there is any that have adhesive backing still
I like the thought of 10-15 degrees cooler
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Old 05-24-2022, 03:10 PM   #9
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Quote:
Originally Posted by mikepsparky View Post
thanks all going to keep looking to see if there is any that have adhesive backing still
I like the thought of 10-15 degrees cooler
Didn't need the adheasive backing, so far not one of the cabinets has had that insulation come loose nor fall. I just kind of wedged it onto the side and back walls by being cut maybe 1/4 inch long. Even did the bathroom cabinets.
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Old 05-24-2022, 03:32 PM   #10
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Newmar…I used R4 insulation board (from Lowes).cut to fit, and used Liquid Nail to glue in place.
Seems to help.Bread in upper cabinet was spoiling after just a few days, lasts much longer now.
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Old 05-24-2022, 03:53 PM   #11
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I used reflex and stapled it in.
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Old 05-24-2022, 04:59 PM   #12
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I just bought a 24" wide and 48" wide roll or Reflectix from Lowes. Also a roll of 2" wide double stick carpet tape to hold it in place. Plan on doing all of the cabinets.

Also, any advise on cutting some pieces to go over the windows. I was concerned about the reflective heat causing the glass to break. Although they do make silver windshield reflectors and it doesn't seem to be a problem. I would like to do the windshield and at least some of the side glass (most of our shades are down at this time of year in Florida anyhow). Any advise is appreciated!
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Old 05-24-2022, 07:07 PM   #13
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We ended up gping with the Magna Shade for the front, and side windows to block the suns heat coming into the rig. Really made a huge difference in the amiunt of heat we had to deal with inside the coach during the heat of the day.
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Old 05-24-2022, 09:07 PM   #14
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Hit big box hardware store and grab many rolls of reflective insulation and staples and stapler and box knife with many blades .. do everywhere you cannot see it.. back of all cabinets.. pull microwave and just a few staples to hold it into space.. you will find no insulation there.. if you have front tv and or cabinets.. do that to.. pull every drawer and do behind those ... when you look at front cap from inside.. if you have tv.. there will only be 1/2 insulation.. do back closets..

So you cut 1 inch bigger than area.. it holds itself in place.. then add a few staples to hold it.. I have 32 ft.. I used many 10 rolls.. can't remember.. just make sure that behind cabinets you keep plumbing on inside... to warm side of rv.. and tuc it between pipes..
Then there is bathroom.. cabinets and shower if you can get at it..
Then the front windshield.. all that.. you can insulate front windshield for 5 bucks vs $$$$ for magna shade.. but magna shade looks better.. for the most part .. you can't see it from outside unless really looking.. and who cares about them
You can add hook and Lupe fasteners to do all or some of windows.. so get much more than you think you need and keep recept .. you can always return.. I would start with 5 big rolls.. I did behind couch..
This stuff makes huge difference.. but down side is.. you want to use as few staples because you may want to look behind it.. if you have a leak.. so try to cut larger and just push it into place.. you may have to remove cabinet trays to push into place.. and behind cabinets where you can't reach.. use 4in paint roller on 12 in stick.. works great.. just roll it out.. WARNING if you use bed to cut it.. make sure you have 2 layers of moving boxes down 1st or you will cut bed.. this stuff already has marking on it.. but a drywall square 48in best and many black markers..
Good luck and keep us posted
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