Join Date: Sep 2011
Location: Liberty Landing
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Re: what glue for attaching foam insulation to the cabin interior?
I just ordered some of that non-woven carpeting which fits the contours (ie "monkey fur"), it is essentially the same as what was there before. It is not for the headliner, only for the sides of the v-berth laying on the hull. The stuff which was there had gotten mildewed over the years and was a little nasty, so I ripped it out and now want to insulate since I've got it out already. I even have the old carpeting to act as a template for the new stuff.
I had considered a nice cedar lining for the v berth but frankly, it would cost double what the carpeting costs and take 5 times longer to do. It's cold out, and I have other jobs which need doing so I don't really have the time. Especially since I don't live aboard, and it's just an old Hunter 25 nothing special. I am not too concerned about mildew anymore, since I did a refit last year and now don't have a drop of water intrusion anywhere on the boat even in heavy rain.
I don't know about the spray adhesive because there will def be gaps between the hull and the insulation, and I am concerned that moisture will condense in these gaps. Plus there will be a very imperfect bond anyway. The surface of the underlying fiberglass is very rough and still has some hairs from the original carpet stuck to it in a few places. Ideally I would sand it smoother and remove all surface imperfections for gluing, but I feel that this is a bit overboard and unnecessary in this particular case. So I figured some sort of a gap filling sealant/adhesive would be best. However maybe I will just go with the 3m if that will be adequate... marine caulking is dam expensive and I would need ALOT of it!