| Author |
Message |
davidschinske (65.90.114.104)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 27, 2001 - 10:17 pm: | |
Been trying to figure out which insulation is the most cost effective for our bus. Put together a spreadsheet using $ from Home Depot (Owens Corning Foarmular 150 4x8 sheets), McMaster-Carr (Fomo 32 oz refill can w/o spray rig) and Concourse West (EHP Rollboard). Does anyone know what the R-Value for the rollboard is? I have been figuring $ per SF and $ per R factor. |
Steven Gibbs (12.148.43.7)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, November 28, 2001 - 11:47 am: | |
David,
I don't think you will get a good comparison by using the 32 oz refill can of foam. I bought the small spray kit (250 sq) and the large spray kit (600 sq) and wish I had bought two 600's because I ended up needing just a little more and it would have been cheaper to purchase two 600's in the first place.
Also keep in mind that spray will take about 4 hours including prep and cleanup and every little crack will be filled. I even filled the steel tubing runing vertically and horizontally down the walls. This sealed the backs of all the exterior rivets.
We have found the coach to be solider and quieter with the foam.
Steve |
David & Lorna Schinske (Davidschinske) (65.91.142.41)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, November 28, 2001 - 5:24 pm: | |
Steve,
The 32 oz refill is to refill the spray unit they sell. I just priced out the foam only because it wouldn't be a fair/accurate $ comparision to include the price of the spray rig
Lorna |
Steven Gibbs (12.148.43.6)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, November 29, 2001 - 11:03 am: | |
Lorna,
I still think you are comparing the wrong application system. The 32 oz of foam will seal some cracks in wall or around windows. It might even insulate a small box holding a water heater or holding tank. Also, I think that you are looking at the one part foam. This will not work because the setup and expansion time is over 15 minutes. You will not be able to acurately judge the finished depth.
The large kits are two part and expand within 30 seconds and set in 1 minute. They come as two large, disposable tanks (about the size of the refrigerant tanks AC guys carry). The "spray rig" is simply two lines, valves, and a plastic gun with several tips.
The real bottom line is that it is cheaper to buy the larger qauntity that you need in one (actually two) containers than to buy 60-100 32 oz spray cans.
Visit the Fomo Products web site for most of the material you need. When purchasing I found the McMaster-Carr product was the same, cheaper, easier to purchase and came sooner.
Good Luck,
Steve |
Daris Bouthillier (209.67.181.133)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, November 29, 2001 - 11:14 am: | |
On the other hand it may be fair and/or accurate to include the cost of the spray rig. After all it is an additional cost that you will not have to pay with other methods. Just a thought. |
TonyW (64.12.101.164)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, November 29, 2001 - 11:48 am: | |
Hey David,
For economy, its hard to beat the 4x8 sheet foam. Seveal different widths, 1/2,3/4,1&2 inch stuff will make whatever thickness is desired.It cuts to fit real easy, no special tools required.Tape the seams w/ furnace tape and yer done. I don't think I spent $100 all told to insulate our RTS II but we have 24 big sliding windows we didn't have to cover.
Good luck w/ whatever you decide,
TonyW |
David & Lorna Schinske (Davidschinske) (65.91.143.176)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, November 29, 2001 - 1:34 pm: | |
So far based on what I can figure out....Foam sheets are R5 to R6 per inch. FOMO is R6 to R7 per inch. Based on the figures I have come up with we are not gaining much to use the spray foam. Based on 1584 sf ft of bus surface (Yes, I know that is a bit too much..floors,walls,ceiling and basement) to get 2" insulation I have come up with 2"spray foam $5205.66 @ R12, 2" foam sheet $1038.02 @ R10, 4X.5"=2" foam sheets $1550 @ R12, 3x.75"=2.25" foam sheets $1400.37 @ R12, .5 + .75 +.75=2" foam sheets $1321.16 @ R11. We will probably go with the 3 layer foam sheets so we can overlap seams. I can't see where the spray foam is that much better.
Lorna |
Gene Lewis (Genelewis) (166.82.235.10)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, November 29, 2001 - 2:43 pm: | |
IMHO and FWIW-------- I elected to insulate my coach with Foam sheet. I am a trader and scrounger and hate to see anything wasted --- guess its a silly trate I've picked up. For this reasopn when I passed a school being built and saw the pieces of Foam board that was bound for the dumpster it hit me ------- there is no place on the coach that I can use a 4x8 sheet. Each piece must be cut to fit. I decided right then to see the job super and told him what I was doing and I would be interested in getting only what was bound for the dumpster. He told me to help myself. I did the walls, ceiling, and floor of my 05 Eagle with 1 1/2" Foam board. The only cost I wound up with is for the caulking that I used at the joints -- about a C note.
Additional info at CCC under gene lewis 'work in progress' as well as 'articles'. http://users.cwnet/~thall.htm
Enjoying the journey in NC
gene |
DrivingMissLazy (65.207.109.39)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, November 29, 2001 - 8:00 pm: | |
A tip. An electric kitchen carving knife makes a wonderful tool for cutting foam.
Richard |
Jimmy Besett (209.240.222.32)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, December 01, 2001 - 9:48 pm: | |
I have a spray foam rig for sale but used to charge around 1000 or so to insulate a coach. |
Mike SS (24.120.111.24)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 07, 2001 - 12:08 pm: | |
If you go with the foam sheets buy a roto-zip tool. Just place the sheet over the area and trace it. With no math, my wife and I did our Eagle in one day. Some spray foam was used above the ceiling around the wires and pipes.
Mike SS |
C. Ray Powell (Raypowell) (152.163.207.202)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 10, 2001 - 7:19 pm: | |
Don't cut corners on insulation. I had our bus foamed and also installing some of this expensive space age insulation. We have a aluminum skin motorhome with skimpy insulation. No fun. Hard to heat Hard to cool |