Hi all. Iv to plaster a new build in the next few weeks.There are a couple of areas externally where plywood is flush with the blockwork.The spec is smooth sand/cement finish.The reason why the plywood is meeting the blockwork flush is because the chippy erected a flat roof finished in fibreglass and made a fascia 500mm .200mm of this fascia is finished in fibreglass and the other 300mm is exposed plywood.The length is 2.5m long. The plywood and block wall are butted together flush so I have to render through both without it cracking along the joint.An expansion joint would look s**t.I suppose my only option is felt,riblathe,fibreglass mesh incorporatd in the render but even this way it could crack.How would ye folks conquer this 1.