Insulating

[Sam1Am]

(TLDR: any reason NOT to put pink fiberglass insulation behind the trim panels in the rear?)

I had the bright idea of insulating my 2017 Off Road for noise, thermal management, something to do, and because I pretty much live in it for almost half the year. The idea was to pull the rear panels and use several peices of Reflectix cut to fit. But looking in there, my goodness, it’s a maze of a bazillion little cubbies! (Picture attatched for your amuzement.) No way I’m going to try to cut-to-fit anything in there- who needs that aggravation?

But Ive got tons of scrap pink fiberglass insulation, perfect for losely stuffing into little maze-like cubbies. Is their any reason one aught not to do this? My real concern is little electric shorts or sparks lighting and smoldering back their unbeknownst to me until too late. (Not that I’ve done any electrical work back there that might increase the risk beyond whatever Toyota does at the factory.) Is that a valid concern, or is it no more of an issue than in a house?

Are their any other reasons to not do this?

 

[Sam1Am]

Heh, forgot the pic.

 

[Banzai]

I wonder if anyone has ever sprayed closed-cell insulating foam into their vehicle like they use in homes? That'd be something.

 

[Sam1Am]

I wonder if anyone has ever sprayed closed-cell insulating foam into their vehicle like they use in homes? That'd be something.

I thought of that, but it’d be a bit pricey.

 

[CJFONNER]

I’m interested in this as well, mostly for the sound damping effects. I’ve seen a few videos on YouTube relating to the “van living” fad (enter Chris Farley joke here). Some people have insulated the inside of their box van panels with pink fiberglass insulation with good results.

I worked in the building materials department at Lowe’s for about a year. The insulation aisle is noticeably quieter than any other aisle in the store. Definitely suppressed ambient noise and echo.

Something to keep in mind - you’d need to make 1000% sure the insulation will not be exposed to moisture because it will mold like CRAZY if it gets wet.

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[Sam1Am]

make 1000% sure the insulation will not be exposed to moisture because it will mold like CRAZY if it gets wet.

Good point! I hadn’t even thought of that. But it looks pretty water tight in there: all the accumulated fine road dust is nice and evenly spread, no drip or run or puddle marks. Something to pay attention to, for sure, though.

 

[Runn4est]

If I were going to be putting actual insulation in my truck, it would be a rock wool application like Roxul. Very good sound deadening vs Fiber glass, and it is very fire resistant.

EDIT: It's also very moisture resistant!

I just refinished my son's room and I batted the floor and walls with ROXUL, and it's like you enter a new realm compared to the rest of the house haha.

 

[CJFONNER]

If I were going to be putting actual insulation in my truck, it would be a rock wool application like Roxul. Very good sound deadening vs Fiber glass, and it is very fire resistant.

EDIT: It's also very moisture resistant!

I just refinished my son's room and I batted the floor and walls with ROXUL, and it's like you enter a new realm compared to the rest of the house haha.

Good idea. Roxul actually mentions noise reduction as a benefit on their packaging.


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[riceandpho]

put a good layer of sound dampener, i use secondskin damplifier pro.

you can also spray it on. some people use to do the spray foam.

you can also add this over the sound deadener.
https://store.secondskinaudio.com/h...ermal-insulation-radiant-barrier-made-in-usa/

 

[DUBBZ_CEMENT_PRO]

put a good layer of sound dampener, i use secondskin damplifier pro.

you can also spray it on. some people use to do the spray foam.

you can also add this over the sound deadener.
https://store.secondskinaudio.com/h...ermal-insulation-radiant-barrier-made-in-usa/

I did a similar exercise on my former FJ Cruiser. I removed every bit of interior and then installed the sound deadening material. I only noticed a small change in the sound, not sure if it was worth the time, energy, and money.

Based on that experience, I have decided to not do this on my TRDP.