Transom and stringer repair

Jakesteel

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Jakesteel

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Mar 26, 2017
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Ive been looking around the site about thickness of fiberglass. Is it the same for transoms and stringers? How thick should it be?
 

Baylinerchuck

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Jul 29, 2016
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I used 1.5oz chopped strand mat, (CSM) for laminations and deck tabbing. I used 1708 for structural tabbing including the transom wood to the hull. These two types of fiberglass with polyester resin should be all you need. Two overlapping layers is what you need. Anytime I use thickened resin as a glue I add 1/4" chop strands to it for strength. I like the added integrity when bedding stringers and bulkheads.

Hopefully this is the information you are looking for. You can click my link below to browse pictures of my resto using the products mentioned above.
 

kcassells

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Oct 16, 2012
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Combination of ;
resin, hardner, cabosil and chopped fiberglass. EEEEEEEEEpoxy doesn't need chopped glass but I throw it in anyway.
Make your regular glue mix and add cabosil while stirring to make it thicker. Actually fold in the cabosil while mixixing and it will blend in faster. You'll fiddle around with amounts until you get it right/comfortable and the qty you want.
You can make it actually as thick as peanut butter so in applications like overhead/upside down it doesn't roll out.
Cabosil is 1 thickener but there are others like ballons that can be added in areas where you want sanding to be easier.
 

Baylinerchuck

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Like kcassells stated.....resin, catalyst, thickener, and possibly strands for strength, especially as a glue or bedding stringers. I mix the catalyst into the resin first. The thicken with cabosil. Generally speaking, 8 oz. of resin, start with 8 oz. of cabosil. Using a 1:1 ratio will get you close. Only mix in 1/2 the cabosil at a time or it'll go everywhere. Cabosil is very light and fluffy. You want it the consistency of peanut butter. Add a little less cabosil if you are adding chopped strands. I make it thick for glue, thinner for fillets. I add a lot less strands for fillets, more strands for glue.
Trust me, you'll mix it the way it works best for you. There really isn't a wrong way, within reason.
 

JASinIL2006

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Feb 10, 2012
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iboat sells resins and fiberglass. I got mine at US Composites. If you can find someone locally who stocks fiberglassing supplies, you'll save a ton of money on shipping. Local suppliers are nice because it's not easy to estimate how much resin, cloth, mat, etc. you will need, and having to wait for a shipment in the middle of a project is a drag!
 

kcassells

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Well that will depend on your $$ flow. :) Look at it this way get a batch of gooods, get the feel for coverage etc. Then you will be able to make better decisions on qty., amounts, time frames for production for the next couple of orders. Poly has a shelf life so keep that in mind.
 

Woodonglass

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Dec 29, 2009
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I'd recommend starting with 5 gallons of resin and 10 yds of 1708 biaxial fabric. Once you start laying glass you'll KNOW how much is needed for your next order. I will say now that EVERY beginner GLASSER use WAY to much resin. My best advice is to ALWAYS coat the substrate with a coat of resin first and after it tacks up a bit apply another LIBERAL coat and lay the glass down on it. Use a bubble buster roller to roll the glass into the resin and let it ooze up from the back side. When the Glass goes Clear...no more resin needed. If it doesn't... add just a BIT more resin. A short nap 6" cloth roller is a good tool too!
 

Jakesteel

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Mar 26, 2017
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I'd recommend starting with 5 gallons of resin and 10 yds of 1708 biaxial fabric. Once you start laying glass you'll KNOW how much is needed for your next order. I will say now that EVERY beginner GLASSER use WAY to much resin. My best advice is to ALWAYS coat the substrate with a coat of resin first and after it tacks up a bit apply another LIBERAL coat and lay the glass down on it. Use a bubble buster roller to roll the glass into the resin and let it ooze up from the back side. When the Glass goes Clear...no more resin needed. If it doesn't... add just a BIT more resin. A short nap 6" cloth roller is a good tool too!

Thanks. Great advice!!!
 

Slager

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Apr 30, 2014
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189
Poly is a kind of resin. There are three resins used with fiberglass polyester, vinylester and epoxy. I would suggest using polyester resin because it's what the boat is made with and is the cheapest.
 

Jakesteel

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Mar 26, 2017
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Gonna try and get the transom completely in tomorrow. I'm using poly, hardener, cabosil and chopped strand. I'm anxiously optimistic. I'll take pics and post tomorrow if I can. Been buying everything slowly when I can which is why it's taken so long.
 
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