Put on some masking tape. Cut.
Peel off tape after layup.

They make stitched fiberglass so this does not happen.

"lupi" wrote in message
...
Ahoy, I'm new to the fiberglass routine. I wanted to cut my 24oz WR
into 5 inch strips so I can lay it onto a vertical surface (topside)
but when I cut it the weave it all comes apart. I count't find any
ready made strip in this size. Is there a technique to stitch it up
and prevent it unraveling long enough to lay it in? Thanks.

That is the nature of the beast. 5" strips will be almost impossible to
keep together. Better to change to a mat backed bidirectional like DB1708
for narrow strips. It stays together much better and is a lot stronger.
One thing that does help is to cut it with an Ofla rotary cutter rather than
sizzors. You can get one at a fabric store for about $15. Also wet out the
surface and lay the roving on dry. Then fill the weave with resin. Neither
is a magic solution but they help.

"lupi" wrote in message
...
Ahoy, I'm new to the fiberglass routine. I wanted to cut my 24oz WR
into 5 inch strips so I can lay it onto a vertical surface (topside)
but when I cut it the weave it all comes apart. I count't find any
ready made strip in this size. Is there a technique to stitch it up
and prevent it unraveling long enough to lay it in? Thanks.

Unroll, measure strips, mark with felt tip, glue scotch tape along your
marks /the worst the tape - the better/, cut along the tape in the
middle /half of the tape is left on strip no., other half on strip no./,
wet the substrate - don't spare, put strips on wetted out surface, fill
the weave with roller,after few minutes take strips of scotch away, the
scotch tape glue should be dissolved, if not fully do it slowly, keeping
glass with roller or finger. Find your favorite scotch, red or yellow is
very good, you can see it better then transparent. I found pre school
type, quite inexpensive, with very poor quality of glue, dissolves in
epoxy very quick.If you are laminating bulkheads into your hull, try
cutting fabric at 45 deg, you will see the difference immediately, and
bond is much stronger

Glenn Ashmore wrote:
That is the nature of the beast. 5" strips will be almost impossible to
keep together. Better to change to a mat backed bidirectional like DB1708
for narrow strips. It stays together much better and is a lot stronger.
One thing that does help is to cut it with an Ofla rotary cutter rather than
sizzors. You can get one at a fabric store for about $15. Also wet out the
surface and lay the roving on dry. Then fill the weave with resin. Neither
is a magic solution but they help.

"lupi" wrote in message
...

Ahoy, I'm new to the fiberglass routine. I wanted to cut my 24oz WR
into 5 inch strips so I can lay it onto a vertical surface (topside)
but when I cut it the weave it all comes apart. I count't find any
ready made strip in this size. Is there a technique to stitch it up
and prevent it unraveling long enough to lay it in? Thanks.