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  Topic Review (Newest First)
08-11-2016 08:22 PM
Re: howto: applying furring strips to fiberglass hull ....BUMP!

Originally Posted by Skookum47 View Post
Saw the post from 2001 but did not see any resolution.

It is now my turn to figure out this issue. The idea of what type of wood to use as a furring strip, how to fasten them to the hull and what type of fastener to use. I have a bare hull essentially. I was thinking about using 1x2 pine. Cheap and easy to bend. Screwing them into the hull. I am lucky as the hull is insulated with another layer of glass over it. However in some parts, mainly up higher to the deck, there is no isulation and I am wondering about whether or not to tack them in in these places or glass them in ...or ???.

Anyone been in this situation or seen a good solution?

Appreciate any advice. Happy holidays,

1) use 3m 5200 to lay furring strips every two feet, vertically; if the hull is curved, you'll have to cut the furring strips into 1.5" squares, so each furring strip will be a column of squares; 2) let it dry - takes a week; 3) attach 2 foot pine panels, 1/4" thick, 1.5" wide; they can only be 2 foot, due to curvature of hull; attach them by screwing them into every other furring strip with 1/2 inch bronze or stainless steel screws. It's a tedious process, but worth the results.
12-26-2008 03:52 PM
jbondy The original ceiling in our '78 Pearson was attached by 1/2" screws into the core of the deck above. This seems to have caused no problems in 30 years. Maybe it was just dumb luck. Maybe it was because it's the underside of a horizontal surface, so there's no water running over it. So when it came time to replace the ceiling, I followed suit. Maybe it wasn't a good idea, but...

Along a similar line: When I installed the windlass this past summer, I found there were some places where I wanted to secure the 0 gauge wires but therer were no attachment points. I used polyurethane construction adhesive to glue small white oak wood blocks to which I then screwed the cable ties. I suppose only time will tell, but was this unwise?
12-24-2008 03:04 PM
sailingdog If there was a faster, easier, cheaper way to do this, don't you think most boat manufacturers would be using it... There's a reason the old proven methods are usually the right ones to go with. Unless there is a change in technology or materials, the old methods are usually the right ones.
12-24-2008 12:17 PM
ronspiker Most glues and adhesives don't work on teak. It is an oily wood so the glue doesn't hold well, that is why you will see teak furniture either screwed together or some type of tongue and pin type construction. If you should try to glue it you first need to wipe the edges being glued with denatured alcohol, that will help with the adhesion.
12-24-2008 12:16 PM
celenoglu Justified's method is best for teak. The only problem is, after you clean the surface with acetone or thinner the traces of the cleaner should evoporate completely. But waiting too lon will cause the oils to reach to thesurface again. You can also use alcohol for cleaning. After cleaning the surface with acetone, alcohol or thinner wait for evoporaiton and apply a coat of epoxy and let it dry. You can later apply a second coat of epoxy and attach them to the fiberglass.
12-24-2008 11:41 AM
justified Saildog has the right ideas on the cedar or the white oak strips 1/2" should be the right thickness, will still bend nicely to the shape of the hull. If you glue/epoxy the teak you will need to clean the teak with acetone or lacquer thinner to get rid of the natural oils in the wood then the epoxy will work fine. the other way would be to screw the finish on but you would want to use an over sized or elongated hole so that you allow for any movement/ flex in the hull, use a finish grommet washer with your screw.

12-24-2008 10:53 AM
Faster Sabreman's point about traditional proven methods is valid.. in the long run shortcuts don't pay off. As someone once said, if you don't have time to do it right, how are you going to find time to do it a second time?

We've done this sort of job several times, always using some form of furring strips as a basis for the ceilings. Bruce Bingham's "The Sailor's Sketchbook" shows a variation, glassing some aluminum tubiing in place and screwing the wood to that after drilling/tapping. Lots of work, true, but there for the long haul. The nice thing about the tubing is that once bent it will retain its shape, unlike most wood that will try to go back to straight and can require some innovative clamping techniques while the glue cures. Kerf-cut plywood strips are another option.

It is a very effective and properly nautical look, though, once done properly.
12-24-2008 10:17 AM
Sabreman sailingdog is right. The other techniques being batted around are a losing cause that will probably lead to either a poor job or a real mess. The veneer proposal, while interesting will be especially problematic. If the veneer has an adhesive backing, it will eventually fail due to moisture and flexing. If it doesn't have an adhesive backing, then getting it to stick over all those curves will be nearly impossible even with a vacuum bag.

One of the most comforting things about boat building is that people have been at it for a while and techniques for most things have been worked out over the years. The technique of adhering vertical furring strips to the hull and screwing the teak (or ash) horizontally across them is a valid one that works. Not to impugn and of the ideas posted, but often times skipping the proven steps isn't really a time saver after all, IMHO.

Pleas understand that I'm NOT slamming any ideas, only emphasing that traditional techniques are proven. Ideas are what this community are all about. Keep them coming.
12-24-2008 09:24 AM
AllThumbs The compound curves found inside boat hulls might make veneer out of the question exept for on flat bulkheads.
12-24-2008 06:33 AM
What about veneer?

I am thinking of doing a teak veneer and simply gluing it on after removing the vinal paper. I don't believe furring strips or insulation would be neccessary w veneer. Is that correct? The ancient vinal paper on there now seems to be holding well and mold nor mildew has been significant. Sorry if I am covering or straying from material already overdone here...
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