Do you guys have any advice, tips or tricks for laying up fiberglass
overhead?

As per what jim said wet out the glass on plastic or peel ply then put up
and roll WITH the plastic still on when it's stuck up you can carefully
remove the plastic and finish rolling, I have used this method hundreds of
times and it works a treat u just gotta b carefull... and wear protection.

wet the fabric out on wax paper and use the wax paper to lift it into
place...watch out for wax residue on subsequent coats..

Don E
"jsheesley" wrote in message
m...
Do you guys have any advice, tips or tricks for laying up fiberglass
overhead?

An idea:
I haven't done this so YMMV.

If you're trying to reconstruct a failed deck core, and the boat can be
turned upside down, then you can cut out the inner skin and the pulpy core
and construct a new core and inner skin working DOWN. If that's not
practical, how about laying the boat over on its side? Wallpaper is not an
impossible PITA.

Working overhead, I've had a lot of trouble in relying on stickyness of
resin.
If you really have to work overhead, I'd try very hard to devise a vacuum
bagging method. The conventional arrangement of laminate|peel
ply|bleeder-breather|bag depends on gravity to keep the resin and air where
they should be, if there's a choice. Invert it and you'll end up with airy
laminate and saturated bleeder-breather. NG! Maybe substitute a thin
transfer medium for the b-b or leave it out and suck from the top side
through perforations? THis could get complicated.

Of course, the practical solution is to cut out the top skin, re-laminate
working down, as the god of gravity intended, and finish with a gritty paint.

Thanks guys, I was asking for a friend. I haven't seen the project
yet. Would there be any advantage to thickening the resin?

jsheesley wrote:

Thanks guys, I was asking for a friend. I haven't seen the project
yet. Would there be any advantage to thickening the resin?

Oh, yes! Moisten the area first with thin stuff, then lay on the
glass or butter on the bog. You must decide on a method for applying
pressure overhead. Blocks, props, plywood and a garbage bag of air
or a wad of soft foam with plastic sheet parting membrane are not as
good as a real vacuum bag, but mucho better than nought.

It is very difficult to apply vacuum overhead with a porous border
to seal the vacuum to. You could 'paint' on a sealing zone.

Terry K

jsheesley wrote:
Do you guys have any advice, tips or tricks for laying up fiberglass overhead?

Use a garbage bag full of air to press up under areas to hold the
glass and goo in place till it sets up. It ain't vacuum bagging, but
it can help in some situations. You can block up a support, or just
blow it up with a vacuum cleaner, depending on the space available.

For a large splat, maybe you could use a weather balloon and fill it
up with a furnace fan, or start at one end and go section by
section, overlapping while still green.

You can lay out an overhead patch on the deflated bag, and lift it
into place with air pressure.

Terry K

On Thu, 18 Mar 2004 18:06:15 GMT, Terry Spragg
vaguely proposed a theory
.......and in reply I say!:
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jsheesley wrote:
Do you guys have any advice, tips or tricks for laying up fiberglass overhead?

Use a garbage bag full of air to press up under areas to hold the
glass and goo in place till it sets up. It ain't vacuum bagging, but
it can help in some situations. You can block up a support, or just
blow it up with a vacuum cleaner, depending on the space available.


Just watch out for sharp bits of glass on the old layup. These can be
bad inside a boat

DAMHIKT
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