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Old 11-18-2012, 03:37 PM   #1
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Insulation

I am doing some work on the valve on my poo poo tank and even though the underbelly is enclosed there is no insulation under the main living quarters of my camper. Should I add insulation, what kind, on the floor of the belly or attach to the sub floor? Thanks in advance for your help.
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Old 11-18-2012, 04:18 PM   #2
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You can if you want, couldn't hurt. Usually it's just laying up on top of the under belly.
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Old 11-18-2012, 06:51 PM   #3
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Would that be just regular fiberglass batt insulation?
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Old 11-18-2012, 09:10 PM   #4
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Yep. Nothing special.
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Old 11-18-2012, 09:51 PM   #5
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Fibreglass batt insulation can soak up a lot of water and become useless.

If you are insulating to stop tanks freezing then it will be of limited benefit unless you have a heat source there as well
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Old 11-18-2012, 10:07 PM   #6
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You would do better to spray foam the underside as fiberglass will soak up water. You could also retro fit tank heaters with minimal expense. When in use your motor home is an efective heatsink. Slightly freezing temps ouside probable won't freeze the holding tanks.
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Old 11-19-2012, 07:06 AM   #7
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Thought of insulation for the wet bay. Saw only work there. Opted for a $5 trouble light for in the bay when temps are below 30. Works well.

But I avoid temps below 40, and my knees thank me for that.
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Old 11-19-2012, 07:31 AM   #8
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Good answers above, but 'mat is not your friend' as noted above. If you want to go down this route take 1 or 2 inch fome (sp?) (can't find 2''? No problem, just glue two 1" together) sheets and lots of contact glue. Same stuff they use 'in home' wall construction. Gets a bit fiddlie, and not a job one guy can do as you put a 10'-12' 2x4 (on edge) underneath and lift (PRACTICE THIS FIRST!!) into place. Take pre-cut sections of 2x4 to act as wedges to hold the board/fome sheets in place while the glue sets/holds.

Actually took a light automotive floor jack and had enough room to slide same under the middle and did a light upward push (it doesn't take much) and the thing worked a treat.
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Old 11-19-2012, 08:15 AM   #9
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consider some reflectix as a barrier --- just found out our 5er has it throughout !!
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Old 11-19-2012, 08:32 AM   #10
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Go to any home supply of your choice and get blue foam board - you can find 1", 2" and maybe 4". Also get some liquid nail glue in tube. Then go to a truck tire repair shop and get three or four inner tubes that will hold air. Then you just cut pieces to size, put liquid nails on the side to glue up and use the inner tubes to hold in place. If the distance is greater than one tube fill lift/hold then put one on top of each other.
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Old 11-19-2012, 01:37 PM   #11
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The reason there is no insulation is simple. Warm Air Rises! So Unless You have a source of Heat underneath insulating is a waste of time and money! Proper Air circulation underneath is important so don't seal moisture in or You will have Rust.Rot and Mold to contend with in the years to come.
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Old 11-20-2012, 08:46 AM   #12
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Talking

Quote:
Originally Posted by RobRV View Post
The reason there is no insulation is simple. Warm Air Rises! So Unless You have a source of Heat underneath insulating is a waste of time and money! Proper Air circulation underneath is important so don't seal moisture in or You will have Rust.Rot and Mold to contend with in the years to come.
I had not thought of this. I only thinking of a warmer floor. Maybe I should put my shoes on.
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Old 11-20-2012, 12:49 PM   #13
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Quote:
Originally Posted by RobRV
The reason there is no insulation is simple. Warm Air Rises! So Unless You have a source of Heat underneath insulating is a waste of time and money! Proper Air circulation underneath is important so don't seal moisture in or You will have Rust.Rot and Mold to contend with in the years to come.
So the warm air rises from the ground in sub freezing temps and keeps the tanks and any lines from freezing? Makes sense
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Old 11-20-2012, 04:37 PM   #14
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There really is no way to seal the basement completely, I was just trying to think of a way to save $$ in the summer and propane in the winter.
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