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Friend's question on GB house construction

 
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Mahalo Moi
Mahalo Moi
San Francisco, California
1986-42Cl #966
Supporting Member

Joined: 26 Jun 2008
Posts: 244

PostPosted: Sun Aug 28, 2016 8:38 pm    Post subject: Friend's question on GB house construction Reply with quote

A fellow on another forum asked this question. We tried to have him join this fine group, but I don't think he'll come over! His question, and I quote:

"Surprised that I have to make inquiry. Knowing that the woody hulls had plywood cabins, were they over layed with glass? And then when glass hulls came about, did the construction continue with wood houses glass over layed?
and then were the later,latest newer boats all glass, hull and cabin?"

Bob?

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Ray Muldrew
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Marin Faure
La Pérouse
Bellingham, WA
1973 GB36-403 (GRP)
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Joined: 13 Jan 2004
Posts: 5125
Sammamish, Washington USA

PostPosted: Mon Aug 29, 2016 12:06 pm    Post subject: Reply with quote

We have one of the first batch of fiberglass GBs built. After 18 years of ownership we have come to think of this generation of GBs as wood boats in a fiberglass shell. Smile

The hull is a solid glass layup, of course. The main and flying bridge decks are glass-plywood-glass sandwiches with the teak plank surfaces screwed down onto them. The cabins are fiberglass shell moldings with interior wood bracing and paneling. The fore and aft cabin overheads are fiberglass reinforced with plywood. The flying bridge is a fiberglass molding; from the various holes I've drilled or removed fasteners from there does not seem to be any wood used in the flying bridge shell. The entire interior of the boat-- floors, bulkheads, berths, cabinetry, doors, etc.--- is wood with the exception of the countertop surfaces and the shower pan under the teak shower grate.

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Marin
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Mahalo Moi
Mahalo Moi
San Francisco, California
1986-42Cl #966
Supporting Member

Joined: 26 Jun 2008
Posts: 244

PostPosted: Mon Aug 29, 2016 11:18 pm    Post subject: Reply with quote

Thanks, Marin. I appreciate your time and will pass this info on. Hope all is well with you!
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Ray Muldrew
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Bob Lowe
DREAMER
Oak Harbor WA
45' Alaskan 1974
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Joined: 28 Apr 1999
Posts: 13156
Mexico

PostPosted: Tue Aug 30, 2016 10:05 am    Post subject: Reply with quote

I think Marin probably summarized the situation with the fiberglass GBs pretty well. Most "fiberglass" boats use plywood in back of the fiberglass to provide good purchase for fasteners (laminate is not so good for that) and also to provide stiffness.

The GB woodies only used fiberglass & resin for the cabin tops and so did not cover the cabin or other areas with fiberglass & resin.

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Bob Lowe
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