The problems you might encounter fall in 3 categories:
1) Dielectric loss. You can check the manufacturer's data sheet, which should be accurate.
2) Variations in manufacturing. Is this a big house, does a lot of board material? If so it should be ok.
3) Metal peal strength. Teflon is hard to stick to! Some houses can stick the copper better to the teflon than other houses. Take a sample of the board, make some small squares, heat the board up to soldering temperature with an iron and see if the pads lift right off. Compare that to the duroid you normally use. You need good metal adhesion nowadays as the pads are getting smaller every day!