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#1 |
Registered User
Join Date: Nov 2009
Location: Austin Tx
Posts: 639
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Spray foam inside cab roof?
Im thinking about spraying "spray foam" inside the roof panels to cut down on noise. I was thinking of using some long tube to slip over the nozzel to get up in there preety good. I would go through the sunvisor holes, and the cab light hole. I have used this stuff before around the house and Im affraid that it might push out areas of the roof. Im Dynomatting everywhere inside the cab and doors, Im really trying to get it quite as possible inside the cab.
Would this be a bad idea? |
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#2 |
Registered User
Join Date: Sep 2010
Location: Gainesville, MO
Posts: 251
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Re: Spray foam inside cab roof?
I cannot see why it would be... I mean, if you're gonna do it in the doors or something that would put the foam in the way of mechanical parts moving it would be a problem, but simply putting it in an empty space in between panels wouldn't cause any harm. That stuff won't push out metal though. The only other thing I could think of is if there is an acid in that stuff that would cause the metal to corrode over time. But I doubt that as well. I would do it myself, not a bad idea. Plus you'll have better insulation for cooling or heating...
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#3 |
Registered User
![]() Join Date: Mar 2010
Location: tulsa,ok
Posts: 1,085
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Re: Spray foam inside cab roof?
I would like to hear if anyone has done this also.
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MY BUILD THREAD http://67-72chevytrucks.com/vboard/s...d.php?t=423629 1969 custom/10 swb--SOLD 1968 swb 50th anniv.--SOLD 1967 camaro ss/rs..LS-6-speed, 16-year long project 1956 chevy nomad 1955 chevy 210 2-dr sedan 1978 el-camino ss 1-owner |
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#4 |
Burnouts are therapeutic
Join Date: Jun 2007
Location: lancaster, south carolina
Posts: 852
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Re: Spray foam inside cab roof?
they make different grades of it and some expand more than others ,as long as you use minimal expanding it would likely work. I would research whats in it as already mentioned and its affect on metal.
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1969 CHEVELLE SS 1972 C10 ALMOST DAILY DRIVER 1968 C10 RUSTBUCKET (MISSION IMPOSSIBLE) 1972 PONTIAC LEMANS CONVERTIBLE (WIFE'S CAR) "My wife and I were happy for twenty years. Then we met." - Rodney Dangerfield "The difference between genius and stupidity is that genius has its limits." - Einstein |
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#5 | |
Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
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Re: Spray foam inside cab roof?
Quote:
Most all new cars and trucks have foam sprayed in them for noise control. You will have to get the correct stuff. The kind that does not attract moisture. If you have rust in there now don't know if its a good idea. All the new cars have corrosion protection far superior then back then. |
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#6 |
Roadtrip!
![]() Join Date: Feb 2003
Location: Grand Rapids MN
Posts: 13,737
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Re: Spray foam inside cab roof?
I will say it will hold moisture and give you problems down the road. If you are worried about noise, maybe something with a custom headliner...
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67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto |
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#7 |
Account Suspended
Join Date: Jul 2006
Location: DFW
Posts: 1,427
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Re: Spray foam inside cab roof?
I would think that if used on a vehicl, closed cell foam would be the way to go. My understanding is open cell foam can act like a sponge and hold moisture--bad.
I've never tried it so don't trust my opinion. Spend some time researching the subject. |
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#8 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Spray foam inside cab roof?
for noise problems i always just got bigger speakers
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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#9 |
Registered User
Join Date: Dec 2007
Location: Nanaimo B.C.
Posts: 604
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Re: Spray foam inside cab roof?
I have seen it done and it worped the inner roof section and short of cutting the inner roof out there would be no way to fix it.
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I was hooked on these trucks since 1982 when I drove my budys fathers 1968 Custum GMC 396 automatic dana 60 rear with a power lock diff what a ride more fun then we will we can ever tell!! |
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#10 | |
Looks good at 20-ft .....
Join Date: Apr 2005
Location: Mtn Home, AR
Posts: 707
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Re: Spray foam inside cab roof?
Quote:
I'm, not a plastics chemist, but: 1. Most of the generally yellow or tan-colored expando foams tend to be approved / recommended for use in sealing cracks around windows, doors, foundation, etc, to tighten-up energy efficiency in houses, where they would get some amount of exposure to moisture from both inside & outside the house sources, so I doubt the foams would be recommended for that use if they would absorb & hold moisture, if for no other reason than that would promote wood rot & mold growth. 2. The high $$$ bass-boat manufacturors here (Ranger, BassCat, Viper, Cobra, etc), all use expando foam to fill the voids in their boats for added floatation --- Most of those boats won't sink, even if they're swamped level full of water, & have a 200 HP motor bolted to the transom. Those voids in the boats do get exposed to water at times, so I doubt those foams would be used if they absorbed water. 3. The Corps of Engineers here on boat dock floatation is making everybody change over from the old white "coffee cup" style bead-foam which DOES absorb water & gets waterlogged & breaks down in water eventually, & they're making everybody change over to the newer expando foam on boat docks. 4. Why not just test it out ??? Take a clean & rust-free piece of steel & spray a big blob of the foam you might want to use onto it, let it set up & dry, & put it outside & spray water onto it daily for a month or so. If the neighborhood dog comes by & helps, so much the better. When you think it's been long enough, scrape the foam off the steel & see if absorbed water or a chemical in the foam has started corroding the steel where the foam was. My guess is that the foam area will be rust-free & everywhere else on the steel will be rusted, but that's just a guess. PS: I'd use it, & not worry about it. Last edited by 68shortstep; 10-03-2010 at 03:19 PM. Reason: spelling |
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#11 | |
Redefining LowBudget
Join Date: Mar 2009
Location: lebanon Cow Hampshire
Posts: 4,538
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Re: Spray foam inside cab roof?
Quote:
Check the boat forums the foam used in boats is closed cell..that being said I have dug ALOT of foam out of boat that where water logged...that also being said your roof had better not be under water all the time or you have other issues
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1970 C10 CST fleetside 472 ....big dreams little cash... SunShine Syndicate.. ![]() Mikes Sandwich Fair Run OCT 8th 2011
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#12 |
Six in a row makes it go...
![]() Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
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Re: Spray foam inside cab roof?
Here's what it looks like in there in case you're curious.
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67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
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#13 |
Spanked once
![]() Join Date: Oct 2006
Location: Intheshop, Indiana
Posts: 969
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Re: Spray foam inside cab roof?
Well if it helps any for confidence ,I am shooting mine with body wax first and still looking for the foam ford uses to fill with. If nothing comes up I will use Great stuff.
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The ole 350 budget build. |
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#14 |
Registered User
Join Date: Oct 2009
Location: Townville,Pa
Posts: 284
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Re: Spray foam inside cab roof?
X2 with Red69. I would use minimal expanding foam because it may hump up your roof and there is no way of getting it out short of cutting the roof. I put a good headliner in my truck and it's quiet enough.
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#15 |
Registered User
Join Date: Nov 2009
Location: Austin Tx
Posts: 639
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Re: Spray foam inside cab roof?
All very good points..... I just painted my cab on saturday, came out pretty good. My cab roof is black and being here in Texas (always hot) I doubt moisture would ever have time to develope inside the roof. Im mostly worried about expansion. I think I will do some research into various spray foams and give it a shot. I only wish I would have done this before paint most of those spray foams are really messy....
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#16 |
Old Skool Club
![]() Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: Spray foam inside cab roof?
All those questions and all those comments still don't answer your question, do they? All points were valid and thought-provoking. As the owner of a truck that suffered because of the wrong RTV material, the idea that the foam might absorb moisture or react with the metal and cause rust to form, were not lost on me. Seeing the scalped cab makes me think that there's so little room that it almost wouldn't be worth the trouble. I can sympathize with the black and the heat, because that's what I'll have to live with when my truck is done.
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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#17 |
Registered User
Join Date: Nov 2009
Location: Austin Tx
Posts: 639
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Re: Spray foam inside cab roof?
I found this:http://www.subrosa.com.my/automotive_foam.html and
http://www4.shopping.com/Evercoat-Ma...lant-Foam/info Not sure how it differs from the kind of spray foam you get at Home Depo.... Last edited by tonypaul; 10-03-2010 at 10:33 PM. Reason: xxx |
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#18 |
Registered User
Join Date: Feb 2006
Location: Smyrna, Ga
Posts: 1,647
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Re: Spray foam inside cab roof?
They make a foam for windows and doors that does not expand and stiffen like the great stuff. i just used it when i replaced all my windows in my house. the stuff is still soft after several months.
I got it at home depot. if i was going to try it, thats what i would use. i am curious how this goes. its crossed my mind before. |
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#19 |
Old Skool Club
![]() Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: Spray foam inside cab roof?
Lizard Skin is a spray-in insulation that may work well in this app. Yeah, I hear it is expensive, but it's an automotive product that is supposed to be very, very good at insulation properties for both heat/cold and noise.
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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#20 |
Registered User
![]() Join Date: Jul 2009
Location: Houston, Tx
Posts: 1,133
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Re: Spray foam inside cab roof?
You must have watched Powerblock this weekend... I did too
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1972 SWB Medium Olive South Houston Instagram: Antbish84 |
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#21 |
Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
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Re: Spray foam inside cab roof?
I work for Dow chemical and we make a lot of the products used by Ford,GM and Chrysler.(I work two full time Jobs) Also the foreign ones too. Betafill and BetaFoam are trade names of Dow products that they use. We have listings on which vehicles they use it one. Some vehicles they will use another brand but most our Dow. The problem is they will not sell retail unless you buy in tank cars. You will have to go to a wholesaler to purchase. It has anti-corrosion additives and even can be painted over and does not absorb moisture.
here is a link to some descriptions http://www.dow.com/PublishedLiteratu...romPage=GetDoc http://www.dowautomotive.com/capabil...y/betafoam.htm http://www.dow.com/PublishedLiteratu...romPage=GetDoc A lot of the companies will package the products under their own name but these are what the products are. They all buy them under their own product code the resell with their name on it. The stuff works Last edited by mbgmike; 10-04-2010 at 05:43 PM. |
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#22 | |
Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
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Re: Spray foam inside cab roof?
Quote:
Great Stuff is a Dow product. They make many different types for diff applications. Great stuff was not meant for Autos. |
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#23 |
Registered User
Join Date: Feb 2006
Location: Smyrna, Ga
Posts: 1,647
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Re: Spray foam inside cab roof?
How would you go about finding a retailer that would sell to the average dude?
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#24 |
Registered User
Join Date: May 2009
Location: Eliot, Maine
Posts: 1,314
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Re: Spray foam inside cab roof?
i would go with lizard skin or some kind of poly bed liner to coat the backsides of the sheetmetal. you don't want to block the cavity, just muffle the vibration of the panels. they showed how well poly bed liner absorbs explosive energy on mythbusters. and it won't let moisture get under it.
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#25 |
Registered User
Join Date: Nov 2009
Location: FL
Posts: 335
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Re: Spray foam inside cab roof?
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