Polyethylene foam insulation

[rojjim]

Can PE foam be used as carpet padding?
I believe I've seen this used in some 70 series build threads before.

 

[crushers]

http://sell.bizrice.com/selling-leads/391933/EPE-polyethylene-foam-with-Aluminum.html
http://sell.bizrice.com/selling-lea...lyethylene-foam-heat-insulation-aluminum.html
http://www.alibaba.com/product-gs/473948930/Polyethylene_foam_Aluminum_foil_insulation.html
aluminum covered will work better than straight foam. you want to keep air between on the floor in case of moisture build up which will equal rot of steel.
i use the hot water tank wrap material since it cuts down on noise, insulates, easy to work with and doesn't cause rust issues.

 

[crushers]

http://www.mcmaster.com/#standard-foam-acoustical-insulation/=jo6whd

 

[buschmaster86]

some people use that roofing stuff tape also for vibration and sound absortion.

But dont get the bitumen as it stinks like asfalt ! the butyl roofing stuff is good from what i have heard.

I gonna make my bj73 also as quite as possible

 

[rojjim]

I was thinking about moisture trapping too.
I think I will go with 3/4in rebonded polyurethane foam.
Is that good?

 

[crushers]

3/4" is pretty thick but will sound deaden about 45%
1" will give you 60% deadening
1/2" (which i will be using) is 25% sound deadening and heat retention is a sure bonus. the stuff i will be using is heavy duty aluminum foil both sides with adhesive back. not cheap but if you just take strips of the protective backing off then it should stay in place well.

 

[rojjim]

i was referring to a 3/4" (or maybe even 1") rebonded foam with no aluminum lining - is that any good?

 

[rojjim]

don't need heat retention where i'm at

 

[crushers]

not sure but is it safe for the temps where you are living?

 

[rojjim]

not sure but is it safe for the temps where you are living?

yes its safe. apparently the 3/4" foam (with no aluminum) gives significant noise reduction. will give it a try and post an update/picture when done.

thanks.