1. Big sheet of polytunnel plastic

• Use UV stabilised plastic for durability.

• Start in the middle and staple it onto the sticks.

• If applying in cool / cold weather leave a little slack as it will tighten when it heats up.

• At a few points you'll end up with excess which you can fold under. You could cut this off but it will introduce a hole which using a complete sheet avoids.

• Continue this process across the dome.

This was done a bit like this:

2. Triangles of polytunnel plastic

• The triangles of plastic can be stapled to each triangle in turn.

• If applying in cool / cold weather leave a little slack as it they will tighten when they heat up.

• Cut disks or pentagon / hexagons that will cover the hubs and can be stapled to the surrounding sticks.

• Once these and the triangles are in place you can place a batten or thin wooden / metal strip on top of each strut and screw it down to the dome frame.

• This secures the plastic more properly and covers over the joins too – so you end up with strut-polytunnel-strut sandwich with struts still visible from the outside.

This was done a bit like this:

3. Triangles of rigid polycarbonate

• Thin wall polycarbonate roofing panels (say 10mm thick).

• These would be cut down into the triangles to fit the dome.

• Each one fixed to the dome with glazing tape and a bead of silicone sealant to allow for expansion / contraction due to changes in temperature .