Thanks fot the heads-up Karen!
First, that is a beautiful piece of weaving!
Having woven quite a few of these very fine girdles with filament silk, I understand your concern (and have to say congrats for having such a lovely buckle and strap end for it - I've had clients who wanted to use cast bronze on similar belts...far too heavy!)
I would have to agree with Karen. A girdle of this type really is for the lady, and she is not going to be bending and putting strain on her fine silk girdle - her headdress alone would stop anything of that sort. And in re-enactment and living history, we do tend to forget this as we so often have other things to do that a woman of this status simply would not do. (An 18th century ribbon is much finer than can be easily bought today, but still successful as sashes...)
I don't know of any extant girdles of this type which have been lined, though some have been mounted to protect them. (
And, if anyone knows of any, I'd love to add the info to mine). Artistic sources when showing the front and back of these girdles never show anything which could be classed as a stiffener or lining - instead the long end flows just as you would expect from fine silk.
Of course, that doesn't mean that it isn't backed ONLY where the girdle is around the body!
One painting, [1511, The Gift of Kalmthout, Gowin van der Weyden
http://www.wga.hu/frames-e.html?/html/w/weyden/goossen/kalmthou.html] shows a woman wearing what appears to be two girdles - one a reddish colour and very thick (possible leather?) over which a blue/black 'silk' girdle is worn. Perhaps this is the real answer?
A will from 1420 mentions a girdle lined with leather -
"Also I geue to the forsayd John Forster a gurdill of black y-lined with red leather" [FJ.Furnival, as quoted in Fingerlin]
Now - there's no indication that this is 1] a wide girdle or 2] that it is even a woman's girdle. It is being given to a man and so could easily be a sword belt.
Van Der Weyden's Portrait of a Lady also has a detail which might be another answer - if you look at the sides, there appears to be stitching and an small protuding area on the girdle running from top to bottom. Perhaps a bar of some type has been stitched either side to stop rolling? This is what Jane is referring to I think. Many people feel more comfortable doing this.
Or perhaps this girdle has been lined and these stitches are the only ones used?
A tightly woven band, worn at the correct place (not immediatly under the breast - leave a 5mm or 1cm at least) won't roll or curve if the wearer behaves like a lady. And don't wear the belt too tight. It is more likely to both curl and rip if you do.
Likewise, though not of any help to you now, there is evidence for the weaving (The Malatesta girdle) to be done slightly differently - with a warp thread through a central hole, which makes the band thicker. A narrow girdle in the MoL has double the threads through each hole, another strengthening technique, but more pieces survive that do not use either technique.
But in reality, you have a beautiful piece of work there, and frankly I wouldn't touch it. Wear it carefully, practice your posture, and if you are really concerned about your gown, it might be worth discussing the option to stitch the folds in place (Jane - I think there's some speculation this may have been the case?) or use the two-belt method above - at least there's some possible evidence for that.
And, it is worth remembering that there are so many buckles which have been found that have simply been lost from the belt - implying the belt has ripped away.