Screwing into uPVC frame?

[Roger465]

Having to get a 30-year-old mahogany unit (approx 6' x 6') replaced as it's coming apart in places, and has blown panels.

I have blinds on the inside of the current unit, which attach to the existing unit with L-shaped brackets screwed into the frame:

...so I'm wondering about the advisability of putting screws into the plastic frame? Doesn't feel right, but not sure what any alternatives might be...


Thanks for any advice

 

[Notch7]

It’s no big deal, upvc takes screws quite well

 

[ronniecabers]

If you are replacing with a wood effect upvc then it should have ' reinforcing ' within the frame