Foam Panels to finish project...

[4GNomad]

Hey all,

I have installed an inch of polyiso on my walls of the van in 1/2 inch layers. I need to install another 1/2 inch so I can install the wood paneling, but from what Home Depot has told me and based on stock around various stores in my area, the RMAX 1/2" Poly is no longer being produced and I cannot find it in any local stores with 200 miles of my current location. I am left now with a 1/2 gap between the insulation and where the wood paneling would go on the van wall ribs. Should I go ahead and switch to the foam-ball based rigid panels to fill in the extra 1/2 inch or is the R-Value not worthy enough to fill it and just go ahead and tack up the wood paneling with the small air gap. Your thoughts???

PS - I do have and am planning on putting 1 1/2 in Poly on the roof sidewalls and roof of the high top.

Jeff aka 4G Nomad

 

[One Awesome Inch]

HD told me the same thing but I found a good selection of rigid foamboard insulation at Lowes. Have you tried there?

 

[BradKW]

I believe RMAX is (or was) just a brand name of polyIso and there are other brands to choose from. It looks like HD still carries EnergyGuard 1/2 in. x 4 ft. x 8 ft. R-3.6 PolyIsocyanurate Insulated Sheathing, which is the same thing...about R-7 per inch.
http://www.homedepot.com/p/GAF-Ener...ocyanurate-Insulated-Sheathing-1S01/204322721

Or check with any of your local building supply yards, I'm sure they will have options for you.

 

[4GNomad]

HD told me the same thing but I found a good selection of rigid foamboard insulation at Lowes. Have you tried there?

Yeah, I checked with Lowe's. 3/4 is the lowest they go around here.

I believe RMAX is (or was) just a brand name of polyIso and there are other brands to choose from. It looks like HD still carries EnergyGuard 1/2 in. x 4 ft. x 8 ft. R-3.6 PolyIsocyanurate Insulated Sheathing, which is the same thing...about R-7 per inch.
http://www.homedepot.com/p/GAF-Ener...ocyanurate-Insulated-Sheathing-1S01/204322721

Or check with any of your local building supply yards, I'm sure they will have options for you.

Not available in the area. I spend last Saturday calling numerous local building supply yards and their selection was even worse.

 

[BradKW]

Cork is both a decent insulator and also a sound dampener. This product shows as in stock in the Reno stores....3/8 in. x 2 ft. x 4 ft. Cork Project Panel http://www.homedepot.com/p/3-8-in-x-2-ft-x-4-ft-Cork-Project-Panel-00075/206290846

I believe the R-value of cork is 3.6/inch...

 

[highdesertranger]

cork is an excellent insulator. but it's damn heavy. highdesertranger

 

[4GNomad]

Cork is both a decent insulator and also a sound dampener. This product shows as in stock in the Reno stores....3/8 in. x 2 ft. x 4 ft. Cork Project Panel   http://www.homedepot.com/p/3-8-in-x-2-ft-x-4-ft-Cork-Project-Panel-00075/206290846

I believe the R-value of cork is 3.6/inch...

Actually, I am not in the Reno area at this time. I am over in the wine country in CA. Not really interested in cork due to mold potential as it was wood based.

cork is an excellent insulator.  but it's damn heavy.  highdesertranger

Yes, trying to keep weight to a minimum as well.

I guess I'll go with these foamball panels to fill in the last 1/2-3/4. Plan on making a trip to HD today (Closest one is an hour from where I am at). Thanks for your input and suggestions.