Stage drapes are a total differant story compared to House hold drapes. Insurance rates go crazy for any job over 8 feet off the floor. If your employee or someone else gets hurt, bye bye if no coverage... Be thankfull you just vacced. Clean and not replace the FR is also a sueable offence. Last stage drapes that size we did was $2500.00 and that included replacing the FR. We would get 5-600 just for vaccing and that was what we did 70% of the time. We have also used the Dry Dry Drapery cleaning process which would not harm the FR so it didn't need to be replaced.
PSSSST Little known secret, No drapery in-plant machine big enough to handle these.
Cost aprox 12-20,000 to replace plus labor
FR = Approved fire/flame Retardent.