You’ll probably need fasteners which are specifically for polycarbonate roofing. We sell suitable fasteners for every type of roofing available from us. You are not able to use standard roofing fasteners on plastic roofing. They don’t have a large enough washer to go over the required expansion hole.
We also stock accessories: noise stop tape to stop creaking due to temperature change, foam infill to stop wind or debris going in-between the sheets and the purlins, and we stock flashings.
For more complicated systems such as Twinwall, we stock all the required joiners, tapes and end caps.
If you don’t know what accessories you need, feel free to contact us, we’re happy to help.