I hope you get your customers to sign absolving you of any responsibility! No render is within spec on those blocks, how to they get them signed off by the NHBC etc? That weight block is only good for internal walls.
Krend are speccing onto it that's the thing. They will spec anything rather than lose a sale.
They speccied standard ft over insulation for years because they never had a lightweight mono.
Parex introduce ehi or weber m1 for insulation to do the job properly.
All the new house builders are using a coated 3.6nm block for external. It meets the code and believe me all the render manufacturers are happy going over it.
Its all good and well us renderers asking for 7nm but the new house builders ate not interested on low rise developemnets. If your going to adhere to the renderes code you wouldn't be rendering either until the building had settled, how many new builds allow the stand time? Answer is zero.
Were installing for another contractor who has a warranty and spec. Fully backed with nhbc cert. Didn't you know there all in cahoots with each other? I told him its wrong they told him otherwise. Like said they will never lose a sale.
Did krend spec you k1 direct to block?
Because a friend of mine - a good renderer and a member on here had it out with technical in Ireland on the phone about the krend shrinkage issue who admitted that all krend products need a base coat yo eliminate the problem fully.