Fibreglass Floor Replacement

 

Question for those in the know. 

 

How hard and/or expensive is it to replace a section of soft or lifting floor in a fibreglass boat.  I'm sure I've seen a few on here who have done this.  Any ideas on what it might cost to get done by a professional would be appreciated too.  As far as I can tell stringers are solid, just the floor need to be redone (hopefully). 

 

cheers 


Swompa's picture

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Date Joined: 14/10/12

 It isnt perticularly hard. I

Fri, 2023-11-17 10:11

 It isnt perticularly hard. I had to cut rot out of my previous boat. Simple angle grinder with wood blade on it and a claw hammer with some screwdrivers to dig out the old bit. Cut the new bit to suit, make up a thick bog/wood glue to adhere it to any frames and place the new puzzle piece in with a couple of pieces of flat screwed to hold it all level.

Once the glue has set, grind the edges ~ 200mm back over the existing deck so you can then lay the glass over the join starting with a thin piece of woven mat, then increasingly wider pieces then a couple of large pieces over the whole patch.
Sand, bog, prime and paint.

Then cover it all up with carpet to pretend it isnt there.

 

Really, it is a weekend job to get the glass work done trusting it isnt wet under the deck. 

 

 

Bradmac73's picture

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Date Joined: 22/03/17

Thanks Swompa

Fri, 2023-11-17 13:56

 

Appreciate the info

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You’re a brave, brave man.

Fri, 2023-11-17 12:33

Been there done that on more than one occasion. Just be prepared to eat massive amounts of shit and not have your boat in the water for a while. It's an easy job, if you can use a pair of scissors and a paintbrush and have a good sense of humour you can Fibreglass. YouTube is your best friend for inspiration on how to get things done correctly. Be sure to cover everything with a generous coat of resin and mat ( sides of wood most importantly) and don't go drilling any holes through your new deck. 

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Bradmac73's picture

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Date Joined: 22/03/17

Thanks SF

Fri, 2023-11-17 13:57

 

Thanks for the info and warning! 

rob90's picture

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Date Joined: 06/02/13

 I done my floor last year in

Fri, 2023-11-17 13:08

 I done my floor last year in thermolite. Big itchy job. If it's just a patch it should be simple. But if one bit is soft it's all trash. Judging by my experience a pro job wouldn't be cheap for a whole floor replacement. If you want to tackle it yourself just be prepared to get itchy. It's not a hard job and as you have done asking the question here should get you most of your answers. It's a can of worms that needs to be opened but do so with an open mind. What boat is it?

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Bradmac73's picture

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Date Joined: 22/03/17

Cheers Rob

Fri, 2023-11-17 13:58

 

It's a 90's Leeder, doesn't look too bad but agree if one part is lifting and shot the rest likely will be too.    Cheers  

rob90's picture

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Date Joined: 06/02/13

 Mine is a 90s leeder

Fri, 2023-11-17 14:37

 Mine is a 90s leeder customcraft. Only timber below deck was tank supports and floor joists, which I changed out for composite and Ali. Mine has glass stringers so no problems there. Leeder were terrible when it came to floors. Never glassed the bottoms, spoke to a guy who done some work for them back in the day and said they slapped ply sheets down and glassed tops. What I pulled out suggested that. They painted the backs with something like tar that stained the inside of the hull.

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Bradmac73's picture

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Date Joined: 22/03/17

Good to know

Mon, 2023-11-20 11:04

 

Good to know the stringers are all glass. Sounds like the unsealed back might be the issue here too. 

Bradmac73's picture

Posts: 176

Date Joined: 22/03/17

Good to know

Mon, 2023-11-20 11:09

 

Good to know the stringers are all glass. Sounds like the unsealed back might be the issue here too. 

Brock O's picture

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Date Joined: 11/01/08

Most stringers should be

Fri, 2023-11-17 14:35

Most stringers should be fully glassed, Ive an old 79 guardian and mine are, just the floor that cop's it when water gets through.

Been contemplating a new floor and few other bits on mine also, just need an area to sort it, time and money.

scubafish's picture

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Date Joined: 15/08/12

Big &Small

Sat, 2023-11-18 07:59

Big boat $$$$$$ Diy less $$$
Small boat $ Less dollars.
Did mine small boat LUCKY $.
But once you open that door (removing the floor )be very ready for what's behind it .
Get someone else to do it could be a professionals dream and a bottomless pit of $$$$$$ for you.
Flow coat ,Rez,Glass not hard.
Be shore to seal,rez,glass the bottom of the floor as well (condensation).

https://www.youtube.com/watch?v=sjFNhMmTPRw

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Bradmac73's picture

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Date Joined: 22/03/17

Thanks mate

Mon, 2023-11-20 11:01

 

Good advice.  I'll def be sealing all round, toip, bottome, sides   

Swompa's picture

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Date Joined: 14/10/12

Not sure where you live but I

Mon, 2023-11-20 14:36

Not sure where you live but I have a bit of glass here - few different thicknesses both woven mat and uni directional (woven mat on one side and chopped strand on the other.

Its not expesive stuff but if you need some, i am in thornlie...

Bradmac73's picture

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Date Joined: 22/03/17

cheers

Wed, 2023-11-22 14:16

 

Thanks Swompa, I'll yell out if I need it once I get a handle on the size of the job.