Face plates material nylon sheet?

[DundeeDancer]

Face-plates material for the kitchen and bathroom fans to reduce current vent sizes from 150mm down to 100mm.

 

Wondering if I should maybe use 8mm nylon sheet instead of plywood?

 

With all the warm damp air passing by the face-plates might be a recipe for plywood rotting in a short time period.  

 

Nylon or Polypropylene sheet probably last longer than 50 years.

 

I can order the nylon sheets from the internet and get them within a couple of days if it's a good idea? 

 

It's not to expensive for small sheets of 250*250mm, about £8 a plate but if it lasts a long time it could well be worth it.

 

https://www.directplastics.co.uk/nylon-6-sheet

 

Edited November 6, 2017 by DundeeDancer

[Jeremy Harris]

Nylon absorbs moisture and expands and contracts, plus it tends to discolour.  I'd be inclined to use PVC if it we me.  PVC is also a lot easier to machine than nylon, as a general rule.

[Ferdinand]

HAve you got a bit of left over building board you have used elsewhere such as cement board or fermacell?

Edited November 6, 2017 by Ferdinand

[Onoff]

If you wanted "metal" then you could probably get these people in the first link I posted to cut you some out to whatever shape you wanted, even down to fixing holes:

 

 

Edited November 6, 2017 by Onoff