fibreglass and resins

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Andrew Croft
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fibreglass and resins

Postby Andrew Croft » Sat Jul 15 2017 10:10

I see quite a few people online use the west systems stuff for fixing up boats. are there any cheaper alternatives. going to replace a transom for start of syndicate. I need to do it cheaply, but safely.
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Re: fibreglass and resins

Postby Mike J » Sat Jul 15 2017 10:54

Blimey Andrew you know safety never came cheap.

Try some of the commercial suppliers in Portsmouth ot Poole, tell them exactly what you want to do and all the materials you wish to bond, presumably your going to bolt and glass it?
You will need around 12" of (bare material) overlap each side of the join, two different mats and it will be a two stage process.
Checkout Hull Truth for the options.

Ive never done a transom but have installed deck mounts for tee tops and fly bridges but I never scrimped on cost.

Remember if the transom fails someone can get killed (see previous post of mine) and you could be held negligent.

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Re: fibreglass and resins

Postby Andrew Croft » Sat Jul 15 2017 11:05

I wouldnt say skimp but certainly reasonable for a good coverage with some to spare.
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Re: fibreglass and resins

Postby Andrew Croft » Thu Oct 05 2017 11:29

any ideas on this.

waterpoofing the transom wood first whats cheapest with large volume.

its the cost of the resin im worried about more for first soaking and waterproofing the wood, then laying the fibreglass on it before bonding it to the hull.
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Re: fibreglass and resins

Postby Mike J » Sat Oct 07 2017 09:31

Andrew Croft wrote:
any ideas on this.

waterpoofing the transom wood first whats cheapest with large volume.

its the cost of the resin im worried about more for first soaking and waterproofing the wood, then laying the fibreglass on it before bonding it to the hull.

Ive used resin to waterproof wood and to glue up hardwood laminates, its a serious job but once completed its can be forgotten for ten to fifteen years atleast.
For your transom I wouldn't soak it in resin before you begin the reconstruction, a thorough soaking during the lay-up is what you need, especially the cut ends.
Go steady after the initial brush over because resin doesn't soak into wood like blotting paper, it just enters the surface layers 1/4" or so before it reaches saturation point thereafter any more applications just run off.
Use two types of matt, the heavy duty cross strand first followed by rolled matt after.
If your using bolts or screws firstly ensure they are all stainless steel, then drill the holes and run the fixing down the holes to ensure you have no problems, soak the holes before the final tightening and a dab over the heads to finish.
Try and source your materials through a commercial boat builder because it will be much cheaper and they will be able to guide you through the various stages required.
There is also some high tech material now being used in boat construction, foam boards you can bend that will not break and fibres of all kinds.

If your REALLY serious I have some big boat builders with a few miles of me and Id be willing to make an approach on your behalf?

:thumbs:

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Re: fibreglass and resins

Postby Andrew Croft » Sat Oct 07 2017 10:56

Thanks mike. Good shout on going to a builder for materials ill be thinking of that when i get my a**e in gear and may take you up on the offer :thumbs:
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Re: fibreglass and resins

Postby andrew_nagel » Sat Oct 07 2017 12:29

Andrew - over the last 2 summers I've practically rebuilt much of the mid-ship inner skin of my new boat, and reinforced the outer hull from the inside. All this has been wet lay up with polyester and glass. I buy my 2-part polyester and glass mat from a trade wholesaler. I pay around £40 for 5kg of resin, and £5 for the hardner. You need a vapour mask and gloves when working with it. You do not want it on your skin or in the lungs! All surfaces need to be taken back down to the original glass as the polyester will not laminate well to paint or epoxy based gel coats. Everything must be bone dry - no water anywhere. Wipe everything down with acetone to ensure it's all clean before laying up. Don't scrimp on preparation. When laying up use a natural bristle brush and clean it in a jar of acetone. An ali resin roller is useful for larger surfaces too. There's loads on youtube to show you how to go on.

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Re: fibreglass and resins

Postby Andrew Croft » Sat Oct 07 2017 12:42

Been watching so many youtube videos on it. so many different opinions and methods. I seen one bloke cut the transom shape then used pl glue ? (was a bit like silicone caulk gun, but not silicone obvisouly) to bond the two bits of ply together and then he resined the plywood, didnt seem right :scratch:
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Re: fibreglass and resins

Postby andrew_nagel » Sat Oct 07 2017 12:51

Best thing to do is put some photos up of the area you need to work on then we can help you out better. A mate of mine spent a couple of hours with me showing me the ropes. Most of that time was showing me how to prepare the area, get rid of all dust for best lamination, and how to tear the mat and stagger the layers to get a good strength transition. It's a messy material to work with due to the chemicals, vapours and dust when sanding. However, you'll not find a more forgiving material - if you balls it up you just grind it back out and do it again.

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Re: fibreglass and resins

Postby Mike J » Wed Oct 11 2017 07:43

Hi Andrew
Check out this guys work.

https://www.thehulltruth.com/boating-fo ... deo-4.html


You have to take your hat off to these guys.


:thumbs:

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Re: fibreglass and resins

Postby DavyMc » Wed Oct 11 2017 09:30

Here lad, phone them or better still go in explain what your thinking of doing and they will sort you out. I'll give you a hand but it's really not that difficult

http://www.allscotltd.co.uk/
"Rise, like lions after slumber: In unvanquishable number! Shake your chains to earth like dew: Which in sleep had fallen on you: Ye are many—they are few!"

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Re: fibreglass and resins

Postby Andrew Croft » Wed Oct 11 2017 10:45

andrew_nagel wrote:
Best thing to do is put some photos up of the area you need to work on then we can help you out better. A mate of mine spent a couple of hours with me showing me the ropes. Most of that time was showing me how to prepare the area, get rid of all dust for best lamination, and how to tear the mat and stagger the layers to get a good strength transition. It's a messy material to work with due to the chemicals, vapours and dust when sanding. However, you'll not find a more forgiving material - if you balls it up you just grind it back out and do it again.
Boats on the island the now, coming off in a few days :smile:
Best quotes ever
Give someone a match rod up here and it'll probably end up being used for throwing mackerel feathers - Andy Macfarlane
Well that's pointless ya fanny - Dave Lumb

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Andrew Croft
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Re: fibreglass and resins

Postby Andrew Croft » Wed Oct 11 2017 10:46

DavyMc wrote:
Here lad, phone them or better still go in explain what your thinking of doing and they will sort you out. I'll give you a hand but it's really not that difficult

http://www.allscotltd.co.uk/
looks just the ticket :thumbs:
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Give someone a match rod up here and it'll probably end up being used for throwing mackerel feathers - Andy Macfarlane
Well that's pointless ya fanny - Dave Lumb

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Re: fibreglass and resins

Postby cooky » Wed Oct 11 2017 19:08

message me what you need doing mate im a fibreglass engineer ;)

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Re: fibreglass and resins

Postby Mike J » Thu Oct 12 2017 07:19

Brilliant!

This is what forums should really be about.

Help, advice, guidance and links.

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