OK, so I need to cover the timber cavity closures between the block work and the windows ready for rendering (traditional sand and cement).
Im thinking:
Staple building paper/membrane to the timber so that the timber doesn't pull the water out faster than the blockwork.
100mm EML mesh roll which overlaps onto the blocks.
Two unresolved thoughts:
Stainless or galvanised EML?
How to attach the EML?
Decisions, decisions.