Fiberglass cockpit sole soft spot

Chablis

New Member
Joined
Oct 25, 2019
Messages
1
Reaction score
0
Points
1
Age
88
Model
Adventure
I have a soft area on the cockpit floor section that opens to the hull on my GW 20 , I am wondering if I unscrew and pull up if it can be fiberglass repaired or is there a parts cover that I can order. No cracks visible.
 

DennisG01

GreatGrady Captain
Joined
Sep 1, 2013
Messages
7,191
Reaction score
1,341
Points
113
Location
Allentown, PA & Friendship, ME
Model
Offshore
I have a soft area on the cockpit floor section that opens to the hull on my GW 20 , I am wondering if I unscrew and pull up if it can be fiberglass repaired or is there a parts cover that I can order. No cracks visible.
I'm not completely sure of what you are describing, but a picture would help. However, you may be talking about a floor hatch that is screwed in? Like a floor panel that is covering the gas tank? Yes, that is completely fixable and a pretty easy job for anyone familiar with basic fiberglass work. If this is something you'd do yourself, search around for various threads about this - or post back with more info andI/we can provide more detail. But if it's not something you would do yourself... I'm just trying to save my fingertips! :)
 

HookUp

Well-Known Member
Joined
Sep 27, 2007
Messages
236
Reaction score
61
Points
28
Model
Adventure
I have a soft area on the cockpit floor section that opens to the hull on my GW 20 , I am wondering if I unscrew and pull up if it can be fiberglass repaired or is there a parts cover that I can order. No cracks visible.

Is it a 208 walkaround? I just did mine when I replaced the fuel tank.
It was also soft. I have a thread around here somewhere I can link if you like. I have a picture of what the soft spot looked like when I pulled up the deck hatch
 

Fishtales

Well-Known Member
Joined
Jan 31, 2005
Messages
8,034
Reaction score
1,286
Points
113
I believe you are referencing the removable section, if so you could have anything from a simple delamination of the core from the glass to rotted coring that needs to be replaced. Fairly easy job and there are a few folks on the board that have done it.
 

Willy-C

Well-Known Member
Joined
Nov 5, 2012
Messages
189
Reaction score
66
Points
28
Age
68
Location
Hooksett, NH
If you do it right it’ll be rock solid
 

Attachments

  • 829D1D61-AC16-4991-8C39-26A4411BA4C8.jpeg
    829D1D61-AC16-4991-8C39-26A4411BA4C8.jpeg
    1.3 MB · Views: 51
  • A5B8D55B-AF8B-42E2-8FCB-589626A12445.jpeg
    A5B8D55B-AF8B-42E2-8FCB-589626A12445.jpeg
    1.4 MB · Views: 50

DennisG01

GreatGrady Captain
Joined
Sep 1, 2013
Messages
7,191
Reaction score
1,341
Points
113
Location
Allentown, PA & Friendship, ME
Model
Offshore
Did this as an experiment... pink foamboard insulation from Home depot:

IMG-4097.jpg
 

HookUp

Well-Known Member
Joined
Sep 27, 2007
Messages
236
Reaction score
61
Points
28
Model
Adventure
This was done by a professional shop. Very happy with the results. Never understood why GW used all those small square pieceshatch.jpgDeckHatchBottom.jpg
 

DennisG01

GreatGrady Captain
Joined
Sep 1, 2013
Messages
7,191
Reaction score
1,341
Points
113
Location
Allentown, PA & Friendship, ME
Model
Offshore
Never understood why GW used all those small square pieces
The only logical explanation I've ever heard is that it's to avoid air bubbles between the wood and the the fiberglass panel. I can personally verify that this happens and is sometimes hard to control/avoid. Using the small pieces allows you work out any trapped air much easier.
 

HookUp

Well-Known Member
Joined
Sep 27, 2007
Messages
236
Reaction score
61
Points
28
Model
Adventure
The only logical explanation I've ever heard is that it's to avoid air bubbles between the wood and the the fiberglass panel. I can personally verify that this happens and is sometimes hard to control/avoid. Using the small pieces allows you work out any trapped air much easier.

Interesting explanation, but do not agree on that being the reason for all the small pieces. Im sure you can get the air bubbles out if there was only 4 pieces
I just let the pro's handle this part of the job for me so I could do other things that Im better at ;)
 

DennisG01

GreatGrady Captain
Joined
Sep 1, 2013
Messages
7,191
Reaction score
1,341
Points
113
Location
Allentown, PA & Friendship, ME
Model
Offshore
Interesting explanation, but do not agree on that being the reason for all the small pieces. Im sure you can get the air bubbles out if there was only 4 pieces
I just let the pro's handle this part of the job for me so I could do other things that Im better at ;)
I don't disagree that larger pieces than 8" could work. I'm not a pro, but I will say that I had a heck of time getting the air bubbles out from a 2'x2' hatch I made. I ended up drilling a bunch of 1" holes in the wood, then filled the holes with thickened epoxy before putting a layer of glass on. On the other hand, I was rushing as I had to have everything ready to go the next morning for a 500-mile trip.

I suspect another reason for the 8" squares could be:

-- Easier for manufacturing. A 4'x8' sheet is easily divisible into 8" squares.
-- Different boats would have different sized hatches and floors (the boats with wood-cored floors ALSO were cored with 8" squares). Using 8" squares probably makes it easier to quickly adapt to different sized "areas". As the pieces get larger, you start to get into custom sizing (or more trimming), which takes longer. As you noticed in your hatch, it's not really all that important to have full coverage. The pieces can just be, well, "pieced" in - even somewhat haphazardly is fine. The strength of the hatch comes not from the actual core, but from the separation of the two layers of glass (hence the reason why that foamboard still works).

I'm envisioning that on the Grady plant floor, there are large bins of these 8" squares and the workers just fit them in the best they can - along with little chop saws right near by to quickly fit small pieces.
 
Last edited:

Willy-C

Well-Known Member
Joined
Nov 5, 2012
Messages
189
Reaction score
66
Points
28
Age
68
Location
Hooksett, NH
Something worth mentioning.......on all the new repair pics above the wood (or foam board) edges have been tapered and edges were filled with epoxy/cabosil mixture to allow all the screw holes to be drilled in solid glass. All my punky spots on my original tank cover looks to be started from the wood being drilled out and the screw holes allowed water to infiltrate the wood core (See 2nd pic on post #8 from Hookup). Also in between the wood blocks was no resin and only covered with one layer of mat.
This poor construction technique from GW factory seemed to be the norm.
 

leeccoll

GreatGrady Captain
Joined
May 18, 2019
Messages
1,052
Reaction score
416
Points
83
Age
60
Location
Reno NV
Model
Seafarer
Grady used small square pieces so they won't warp down the road.

Rationale is if only one large piece of marine grade plywood there is a risk of that happening.
 

Willy-C

Well-Known Member
Joined
Nov 5, 2012
Messages
189
Reaction score
66
Points
28
Age
68
Location
Hooksett, NH
Grady used small square pieces so they won't warp down the road.

Rationale is if only one large piece of marine grade plywood there is a risk of that happening.

I heard that too, as a precaution I let my first layer set up with heavy scrap metal on a flat cement floor.
 

Attachments

  • 05E9D867-EE8C-4383-BED6-63DD6FCD6469.jpeg
    05E9D867-EE8C-4383-BED6-63DD6FCD6469.jpeg
    1.1 MB · Views: 22

HookUp

Well-Known Member
Joined
Sep 27, 2007
Messages
236
Reaction score
61
Points
28
Model
Adventure
Something worth mentioning.......on all the new repair pics above the wood (or foam board) edges have been tapered and edges were filled with epoxy/cabosil mixture to allow all the screw holes to be drilled in solid glass. All my punky spots on my original tank cover looks to be started from the wood being drilled out and the screw holes allowed water to infiltrate the wood core (See 2nd pic on post #8 from Hookup). Also in between the wood blocks was no resin and only covered with one layer of mat.
This poor construction technique from GW factory seemed to be the norm.

Yes, yes and yes. Spot on
 

Colliw11

Member
Joined
Oct 6, 2019
Messages
23
Reaction score
1
Points
3
Age
37
Model
Chase
For the people that paid to have this work done what did it run you? I need to get my small hatch done (behind the tank cover in front of my seat) and the tank cover had a small soft spot that i want taken care of as well.
 

HookUp

Well-Known Member
Joined
Sep 27, 2007
Messages
236
Reaction score
61
Points
28
Model
Adventure
between 4-5 hundred for the deck hatch