I'm looking for some cheap underfloor insulation to put in for the rest of the season. My plan is to coat, spray foam and recoat this summer. What are some ideas to get me through the winter?
Underfloor insulation
- Thread starter m1kflyingtiger
- Start date
Shoot for 3 inches of foamboard
You can either pay a pro foam sprayer around $300 + , depending on size of your trailer, to spray underside or you can cut and trim pink foamboard 2 inch kind to stuff up under your trailer. I laid on my back and measured how deep the aluminum studs were on the underside then I cut and trimmed foamboard till it was all foamed up. Then,as per advice from trailer dealer guy, I screwed HDPE , plastic, utility boards and caulked em up so rain rock ice cant' warp and mold your insulation. 3 inches is bomb. some guys have uninsulated trailers with huge 42K btu heaters which works for them. I have a small trailer so my 3k btu heater with low insulation worked ok( 55 deg). More insulation and my small heater will be just fine.
You can either pay a pro foam sprayer around $300 + , depending on size of your trailer, to spray underside or you can cut and trim pink foamboard 2 inch kind to stuff up under your trailer. I laid on my back and measured how deep the aluminum studs were on the underside then I cut and trimmed foamboard till it was all foamed up. Then,as per advice from trailer dealer guy, I screwed HDPE , plastic, utility boards and caulked em up so rain rock ice cant' warp and mold your insulation. 3 inches is bomb. some guys have uninsulated trailers with huge 42K btu heaters which works for them. I have a small trailer so my 3k btu heater with low insulation worked ok( 55 deg). More insulation and my small heater will be just fine.
How did you attach the pink board to the floor? The best price I got on spray foam was $800 here. It's not a massive trailer, 3 place enclosed. The 35k btu heater does amazing at heating it, just stays super cold near the floor...where a cot goes when camping.
Just curious, where does the melted snow drain out of the trailer? I'd love to insulate my floor but was afraid the insulation would trap the melted snow.
Mine comes out around the door, and through all the holes in the floor from previous tie downs (bought used and changed some things). Hence wanting a cheap temperary for this year and to seal it next year.
I am a contractor so I had my insulation guy come over and spray foam the underside of my trailer in about 1 inch of foam. It was nice not to be the one under there spraying it or cutting pieces of foam board to fit. The foam they used on my trailer is kind of a white color so its not the ugly yellow crap I have seen on a lot of other trailers. It works pretty dang good. My trailer is a 28 ft Gooseneck.
The pink foamboard was first wedged up in between the floor studs. it was wedged so tight it stayed up there by itself but at highway speeds it would fail so I screwed UHMW black plastic utility boards onto the aluminum studs. This encased the foam just like sheetrock encases insulation just on the underside of the floor.
OK
In all honesty..
What did ONE INCH of under floor foam get you in actual insulation results???
Did it make any noticeable difference?????
