Originally Posted by kathdavis
I would wash it first, because you don't know how clean the water that is on the fabric is. The fabric can have a slight yellowish stain and if you dry it, you may set the stain.
I have to agree. If there's a lot that is wet, maybe going to a laundromat might be easier than home washing. Until it's the leak is fixed, I'd think about putting the dry fabric in plastic tubs. It would be a lot of work, but might save some washing (I don't prewash fabric either).
BTW, you have a lovely sewing studio - less the water, of course.