Hi, we're doing a new build at the moment where the architect has specified render on the 1st floor with cedar cladding on the ground floor immediately below. The upper floor projects so that the face of the render is flush with the face of the cladding below (which will be double battened). The construction is dense concrete block. My feeling is that without putting a belcast-type beading on the bottom edge of the render to kick water out somewhat we will end up with water running down and dripping onto the top of the cedar which doesn't sound good for the longevity of the cedar. Would appreciate your thoughts and suggestions.

Tim

Its the architects problem, it should be better spec`d and if you have concerns with any feature you should ask hir/her , after all they have been paid to come up with a cohesive design.


however
the cedar wont suffer from drenching, but it may stain unevenly, which is all by the by as it gradually turn grey/black anyway. i would take care to use stainless fixing around cedar as the oil attacks galvanize and i would protect it against render splashes ar the lime can have a staining effect on some timbers?

good idea too!

Thanks for the feedback. Don't disagree re: architect or turning it on its head, but architect and client not talking and client unlikely to agree a swap. yes it's an expensive lime render with nanopor paint finish.

Does not sound great that client and architect are not talking.

As a lurker here I have nothing to contribute re the actual way forward other than I would put your concerns to both parties in an email; if they insist on continuing and things go wrong you can at least say " I told you so" and you wont be doing any remedial work at your expense.

If the block is overhanging will you treat it as you would the top of a window reveal i.e. the render goes back the way towards the cladding? If so, I'd put another bead in there so the cladding can slot behind the bead and then use an expanding pu foam tape to provide the seal between the 2.