Laying Glass

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The lay-up schedule called for one layer of unidirectional S-glass (Klynex) laid transverse waterline to waterline and two layers laid at an angle to each other sheer to sheer.  The epoxy was Gougeon ProSet with a hardener that did not require post curing. Besides, sitting in a tent is South Georgia for a few summers would provide plenty of heat for curing.  To avoid worry about amine blush and insure a full chemical bond, I wanted to lay it all in one session. ProSet will allow about 6 to 8 hours of working time at 70o so I needed help!

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Wife, children, boy friends, girl friends and neighbors were pressed into service with the promise of wonderful Caribbean cruising.

I got everything prepared by cutting the glass to size and labeling each piece. Then I cut the breather and peel ply and lightly glued them together with spray adhesive to save time. (If you do this, use the 3M high strength stuff. The other brands may work OK for gluing paper but they are not worth a flip for this!) I laid in a supply of vinyl gloves from the drug store which I found held up much better than the light latex gloves and a dozen pair of heavy latex gloves for the lay-up crew. Nytril gloves work fine with West 205 hardener but fall apart in 209 slow hardener and liquefy with ProSet. I also picked up a dozen Tyvek suits from Granger.

I coated the hull with regular epoxy about a week before we started laminating to prevent the wood from soaking the ProSet out of the glass and washed the hull down with Scotch Bright pads the day before to eliminate any blush. I ran a strip of vacuum sealing tape around the perimeter of the hull and covered it with masking tape to prevent any epoxy messing up the seal.

Early one Saturday in March we started.  In our white Tyvek suits we almost looked like we knew what we were doing! The crew consisted of one mixer, three spreaders and four layers with me running around in growing panic. 

I had build a combination wet out/vacuum table out of melamine coated particle board and the spreaders got to work. The first thing we found out was that a 50" by 14' sheet of wet glass is not an easy thing to handle. That problem was solved by rolling it up on a 2" piece of plastic pipe. It could then be carried to the hull and rolled out with very little wrinkling.

Once the glass was in place it was smoothed and pressed into place with 4" plastic spreaders. You can get them from any body shop supply company for about $3/doz.

Two Warner articulating ladders U-bolted together served as a bridge so we could reach middle of large wet sheets of glass. It took a bit of acrobatics but it worked!

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After seven hours we were finished with one side and half way down the other but we were rapidly running out of energy and time.  We decided to put the bag on and finish the rest later. It took about two hours to finish the last area with a smaller crew.

Among the many thing I learned in this operation was to CONTROL THE EPOXY!.  The spreaders played it safe by saturating the glass.  The layers scraped probably $300 worth of it onto the floor.  Oh, well, at least my future dream shop will have a floor that is impervious to almost everything!

Now go see

Vacuum Bagging the Hull

Site last modified:04/12/04