Q: I'm installing new flanged windows on a home that has fiberboard sheathing. The old windows had no flashing. Will FastFlash adhere to the fiberboard? 

A: Yes, the FastFlash will adhere to the fiberboard as long as the fiberboard is in good shape. Fiberboard can be very brittle since most of the time it is old. We always recommend a test to confirm. 

As always, please follow instructions as stated on the Product Data Sheet.  

Questions? Give us a call. We're here Monday-Friday, 8 a.m.-5 p.m., Central Standard Time, at 1-800-255-4255.