Glueing styrofoam to inside of painted metal van wall....rust?
Denise said
03:50 PM Feb 16, 2010
Can I line my campervan with styrofoam to insulate by glueing to walls and roof and then cover with fabric? I'm concerned about possible condensation and rust between the two....what do you think?....thanks
Just answered my own question ......will get a 5 metre roll of magnetic vinyl and glue strips to back of foam panels .....That way I can air it out by removing the panels regularly. The vinyl is about $180 for 5 ms...found it on th net!....love being self sufficient!...its great fun nutting out these challenges!
-- Edited by Denise on Tuesday 16th of February 2010 03:09:06 PM
Peter_n_Margaret said
12:38 AM Feb 17, 2010
If you want better insulation, use high density urethane foam instead of styrofoam.
The insulation quality will be about twice as good for the same thickness.
Cheers,
Peter
Denise said
03:08 PM Feb 17, 2010
Thanks for that, Is that sheet or spray on? Will I have a problem with rust if its sprayed on? Dont know anything about it. Is it expensive? DIY?
Peter_n_Margaret said
07:06 PM Feb 17, 2010
I bought it in Adelaide in 25mm thick sheets. I used it for fridge and freezer insulation. Not too expensive. You can use most glues too, not like styrofoam that disolves in most.
Cheers, Peter
Denise said
12:24 PM Feb 18, 2010
Thanks for that...my biggest concern is whether condensation (from inside/outside temperature differentials) between the foam and metal will rust the van walls on the inside. ....thats why I thought removable panels might be wise. What do you think. Have you ever checked under yours? Thanks again....:)
Peter_n_Margaret said
05:00 PM Feb 18, 2010
Denise wrote:
Thanks for that...my biggest concern is whether condensation (from inside/outside temperature differentials) between the foam and metal will rust the van walls on the inside. ....thats why I thought removable panels might be wise. What do you think. Have you ever checked under yours? Thanks again....:)
We don't have any metal in the camper walls Denise (we are fibre glass sandwich panel), so it is not an issue for us. If the metal is cold on the outside amd is allowed to get warm and moist on the inside, then condensation is a possibility, but where it is properly insulated and sealed it should be OK. We do get condensation around the aluminium pop-top frame sometimes because of this.
Cheers, Peter
Denise said
06:04 PM Feb 18, 2010
Thanks, I think I'll make them covered removeable sheets do you remember roughly how much a sheet?... :)
seonau said
03:35 PM Feb 19, 2010
Hi....I thought ( seonau thinking? a bit of a wobbly start ) when it comes to insulating there must be an air gap between the two surfaces so heat or cold is not transferred via conduction. ?? Air is a very poor conductor of heat. The idea of putting up panels like you plan is a really good original idea i think but it might be better, if the air gap theory is correct, to make some sort frame between the outer and inner surfaces to create that gap. I just read a second ago you have some silicon.... while silicon is not a good adhesive generally, the one you mentioned you have is. The perfect product to use to stick a urethane foam frame work up on metal and then use magnetic tape on those.
As always my opinions are just that and since i know there are people here with a lot of knowledge, help me folks.
Peter_n_Margaret said
05:25 PM Feb 19, 2010
Denise wrote:
Thanks, I think I'll make them covered removeable sheets do you remember roughly how much a sheet?... :)
4 sheets 2440 x 1220 x 25mm purchased on 15/7/2004 from Huntsman at a cost of $179.12.
There won't be condensation on the inside of the roof if the warm air is excluded and the moisture does not get there. You don't get condensation on the fridge walls for the same reason.
Urethane is a poor conductor of heat and these materials are mostly air, so an additional air gap is not required. Yes, air is a good insulator, but it must be sealed up in 'pockets' to stop circulating currents spreading the heat around. Urethane foam is the material used in fridges and freezers. It is a light brown colour.
Just answered my own question ......will get a 5 metre roll of magnetic vinyl and glue strips to back of foam panels .....That way I can air it out by removing the panels regularly. The vinyl is about $180 for 5 ms...found it on th net!....love being self sufficient!...its great fun nutting out these challenges!
-- Edited by Denise on Tuesday 16th of February 2010 03:09:06 PM
Cheers,
Peter
Thanks for that...my biggest concern is whether condensation (from inside/outside temperature differentials) between the foam and metal will rust the van walls on the inside. ....thats why I thought removable panels might be wise. What do you think. Have you ever checked under yours? Thanks again....:)
If the metal is cold on the outside amd is allowed to get warm and moist on the inside, then condensation is a possibility, but where it is properly insulated and sealed it should be OK.
We do get condensation around the aluminium pop-top frame sometimes because of this.
Cheers,
Peter
Hi....I thought ( seonau thinking? a bit of a wobbly start ) when it comes to insulating there must be an air gap between the two surfaces so heat or cold is not transferred via conduction. ?? Air is a very poor conductor of heat.
The idea of putting up panels like you plan is a really good original idea i think but it might be better, if the air gap theory is correct, to make some sort frame between the outer and inner surfaces to create that gap.
I just read a second ago you have some silicon.... while silicon is not a good adhesive generally, the one you mentioned you have is. The perfect product to use to stick a urethane foam frame work up on metal and then use magnetic tape on those.
As always my opinions are just that and since i know there are people here with a lot of knowledge, help me folks.
There won't be condensation on the inside of the roof if the warm air is excluded and the moisture does not get there. You don't get condensation on the fridge walls for the same reason.
Urethane is a poor conductor of heat and these materials are mostly air, so an additional air gap is not required. Yes, air is a good insulator, but it must be sealed up in 'pockets' to stop circulating currents spreading the heat around. Urethane foam is the material used in fridges and freezers. It is a light brown colour.
Cheers,
Peter