?Use of expanding foam in the doors

[Jacob]

Somewhere I saw that some folks were using expanding foam to fill in the hollow space of the doors...this sounds like a good idea. Any reason not to do it? Anyone had any negative experiences?

[edwardb]

I haven't but one of the guys in our club did. It's OK I guess. Gives a little more solid sound to the door closing. But with the proper weather stripping and door panels, I wouldn't say it's a big difference than mine where I left them hollow. If you do it, just use the low expanding variety. Have read where guys have ruined their doors using the wrong stuff.

[Jeff Kleiner]

I haven't but one of the guys in our club did. It's OK I guess. Gives a little more solid sound to the door closing. But with the proper weather stripping and door panels, I wouldn't say it's a big difference than mine where I left them hollow. If you do it, just use the low expanding variety. Have read where guys have ruined their doors using the wrong stuff.

I share the same opinion. An owner whose car I have scheduled to do the body and paint on in a few months did his and I honestly can't tell any difference. I cautioned him about overfilling and advised him to make a few 2" or so holes on the inside which will get covered by door panels so that it could escape rather than swelling the doors.

Jeff

[Big Blocker]

As mentioned above, the expanding of the doors to the point of splitting the inner and outer halves is the biggest concern. Use low expanding type ONLY! Holes for expansion are the secret (to NOT splitting the doors), as Jeff mentioned . . .
Sound deadening doesn't always equal proper alignment to the door opening and solidly mounted door panels.

Doc

[Norm B]

I used low expansion foam in my doors and if I had the choice I would not do it again. In my opinion, the work involved and the chances of something going wrong out weigh any benefit. The doors didn't sound much different when closing.

HTH
Norm

[rich grsc]

Somewhere I saw that some folks were using expanding foam to fill in the hollow space of the doors...this sounds like a good idea. Any reason not to do it? Anyone had any negative experiences?

I guess I'll ask, WHY?

[steno]

I used some purpose designed low expansion foam in my doors. I put a couple blobs in a couple spots inside between the steel inside the door and the skin. I didn’t try to fill the door by any means. I notice the difference in the sound as you latch the door. Just sounds more solid. I used it on a stainless sink in my home, so I thought... WTH!!

[lance corsi]

If you have windows and door poppers, there's little space left to fill that wouldn't interfere with the mechanisms. I had to add structure behind my door pulls too, but I'm not using the FFR door panels. There really isn't much wiggle room left after all this stuff. My doors prolly weigh in at 30# each now. If the door alignment is correct, the doors sound solid enough to me. The juice isn't worth the squeeze!

[Jacob]

thanks all...sounds like I'm trying to fix a problem I don't have!

[Russ Thompson]

You can get the same solid sound using a fat mat product without the foam worry, then cover with carpet, worked for me.:-)