The chemicals used to make natural fabrics flame retardant can lose their effectiveness over time, it's generally thought that after ten years or so they should be replaced or retreated, but the retreating often is equal to 2/3 or 3/4 the cost of new
drapes, and if your
drapes are approaching 20 years, it's very possible that nobody will be willing to try retreating, due to the probability of the
drapes not surviving the process.
IFR synthetic fabrics don't have these worries.
I've sewn up a number of rips and tears in
drapes over the years, and it's a
bit time consuming, but not hard. Plan on spending an uninterrupted hour of sewing for each
foot of rip. I'll use regular thread and largish normal
hand needles, with as close a color match as possible, and start with a semi-loose baseball stitch to draw the sides of the tear together and back into alignment. Then, I pin a piece of 2" wide gros-grain ribbon (again, as close a color match as possible) behind the tear and secure the edges with a fairly tight stitch, trying not to pucker the front side. The one thing you don't want to do is to gather the fabric - the flatter things stay, the better the repaired curtain will hang. If no fabric is missing, and the thread and ribbon match well, the repairs can be nearly invisible. Depending on how frayed the rip is, you may need to use
scissors to
trim some fuzzies. Machine sewing usually mashes the
velour down so much that it's hard to hide the stitching.
The 'not closing' issue could be a simple matter of resetting a master
carrier. Most bi-parting
traveler's pull ropes start at one master
carrier (the big double-wheel one on the onstage
edge of half the drape), go around the pulleys at the end of the
track, back through the master
carrier for the other half of the drape, around the pulleys on the other end, and back to the first master
carrier. The rope is held to the master
carrier by some sort of clamp, the first
carrier clamps both ends of the rope, and the other
carrier clamps somewhere in the middle of the rope. Assuming nothing else is wrong with the
system, if you pull the master
carrier with the rope ends to the stop center
stage, and then loosen the other master
carrier and pull it to it's stop, and retighten the clamps, that SHOULD reset it so that it closes correctly. If not, something else is going on.