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Addressing differential depth of Brick Slips vs Render


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Our external finish schedule is brick slips at low level, with render on the upper level, as per this detail.

 

ExternalFinishBuildup.jpg.ef3b30c69a4214d6b02022214b3ba629.jpg

A local K-Rend applicator has told me that their build-up is likely to be no more than 8mm for thin-coat render. The slips are like to be in excess of 30mm, resulting in a more pronounced version of what our Architect drew. It feels strange to have the upper finish not overhang, or at least level, with the lower finish. Would you agree?

 

What would the process be for adding, say, 30mm of EPS to the areas that will be rendered in order to create this effect? Would get rid of the need for the Aluminium flashing, would it not?

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  On 05/04/2024 at 08:19, Mulberry View said:

Would get rid of the need for the Aluminium flashing, would it not?

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Some would say not. Like base-rails for EWI, some like a 'proper base'. If your upper layer is to oversail the brick slips it will still need a drip at least, to reduce the risk of the worst-case scenario which is water tracking back into the junction of the 2 layers.

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If you give me a couple of weeks I can show you. We have this predicament in a couple of areas and I'm not sure. Builder has delivered the aluminium trims already, but a week or two before they are installed or at least trial it,

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  On 05/04/2024 at 12:15, Redbeard said:

Some would say not. Like base-rails for EWI, some like a 'proper base'. If your upper layer is to oversail the brick slips it will still need a drip at least, to reduce the risk of the worst-case scenario which is water tracking back into the junction of the 2 layers.

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I would presume the renders will install a drip bead at the bottom of their work? If that protruded beyond the brick slip layer, would that be sufficient? Though, with that said, I wouldn't want to 'see' the EPS on the underside of the ledge (albeit tiny) created by the added EPS

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  On 05/04/2024 at 14:14, Andehh said:

If you give me a couple of weeks I can show you. We have this predicament in a couple of areas and I'm not sure. Builder has delivered the aluminium trims already, but a week or two before they are installed or at least trial it,

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I'll be very interested to see your scenario, do you have render over brick like us?

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