Correct weight of Roving Mat for deck glass up
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=21732
Printed Date: November-20-2024 at 2:36am
Topic: Correct weight of Roving Mat for deck glass up
Posted By: brianmax
Subject: Correct weight of Roving Mat for deck glass up
Date Posted: May-16-2011 at 8:53pm
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I am putting down a new deck in my ski boat. 1989 Ski Centurian. (The new stringers and transom are already installed.) I am looking for any suggestions on the correct weight of roving mat to use. Here is the plan that I have been following: (feel free to attack it with a red marker!)
1. Use Aquatek plywood (1/2" for under the bow, 3/4" for the rest) 2. Cut and shape plywood pieces. 3. Use thin coat of polyester resin to coat both sides of the pieces (for moisture protection) 4. Install the pieces with polyester resin(+silica) 5. Drill holes and pour the 2 part expandable closed cell foam in. 6. Use roving mat and polyester resin to reinforce the corners where the deck meets the boat.(thinking this should be thicker mat??) 7. Use thinner mat and polyester resin to cover the entire surface of the deck. Other Questions: ? Use gelcoat on the deck before glueing carpet down? ? Is using roving mat on the top of the deck necessary? ? Should I use thicker mat on the corners? ? Suggested weight of mat ? Polyester resin OK?  ------------- 1989 Ski Centurion Ford 351W HO |
Replies:
Posted By: 8122pbrainard
Date Posted: May-16-2011 at 10:46pm
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1. No marine ply - exterior is fine and cheaper!!!
3. No polyester - use epoxy - polyester is hygroscopic!! Moisture protection? No!!! 5. Pour foam in a open cavity or inject in a closed cavity. 7. use biax glass ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: connorssons
Date Posted: May-17-2011 at 9:24am
| I coated my ply with a layer of glass on both sides for more strength when screwing seats and acessories down. jeff |
Posted By: brianmax
Date Posted: May-17-2011 at 2:33pm
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OK. Thank you. Good to know about the polyester resin.
A few clarifying questions: * When you say "moisture protection-NO" you could mean 'use expoxy and still coat both sides' or 'dont bother coating both sides in either case'. * So for the polyester work I have done so far, would you suggest coating with gelcoat to seal those parts? * * I found this by searching on Biax. Any idea if this is the correct weight for what I want to do? http://stores.infinityfrp.com/-strse-401/Fiberglass-Biax-tape-17oz/Detail.bok 17oz x 5" Biax 45/45 ( Sold by the yard)- 17ounce per square yard x 5" inch wide Knitted Double Bias (+45/-45 Degree ) fiberglass tape. ------------- 1989 Ski Centurion Ford 351W HO |
Posted By: Robb
Date Posted: May-17-2011 at 4:04pm
| I would suggest visiting US Composites' website. You'll find the Biax, as well as many other types/weights of glass there. They offer good product that is reasonably priced. You can also contact them to get there advice - they answered all my questions and then some. |
Posted By: 8122pbrainard
Date Posted: May-17-2011 at 4:16pm
Brian, Sorry I wasn't very clear. Coat both sides with epoxy and glass. It's not hygroscopic like the poly is and the reson it's used as a moisture barrier on hulls bottoms. Even better, give the wood a couple coats of CPES before the epoxy and glass. With all the work done with the poly so far, it's up to you. You say gel - did you re gel the deck or are you talking about the bilge/stringers? ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
brianmax wrote:Posted By: brianmax
Date Posted: May-17-2011 at 7:12pm
I took your advice and called US Composites and spoke with their technician. He recomended that I go ahead and use Polyester since I started using it and epoxy wont stick to polyester and vice versa. He said that if I put a couple layers of cloth down and then glue a carpet down that I will have plenty of barrier from the water getting into the wood. I uploaded pictures of the bow area here as well as a 'before' picture of the stringers to my account.
 ------------- 1989 Ski Centurion Ford 351W HO |
Posted By: TRBenj
Date Posted: May-17-2011 at 7:30pm
Its true that poly will not stick to epoxy... but epoxy sticks just fine to poly. Otherwise, all of the epoxy rebuilds documented on here wouldnt work out too well! Glass CC's were built with poly until 1989. I sure hope it was a slip of the tongue on USC's part- their techs are usually pretty good. ------------- |
Posted By: 8122pbrainard
Date Posted: May-17-2011 at 10:00pm
Confirm and agree! Sometimes you really don't talk to the correct tech! It happens many times with many company's. Now, if you had been reading more stringer threads on CCfan, you wouldn't have been mislead!  ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: connorssons
Date Posted: May-17-2011 at 11:52pm
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