Should DPC be visable

padstar · 2 Jul 2020

I have had the bricklayers in for the past 2 days and the blockwork is flying up but i have a query about the DPC. I know it is in there and at the correct level etc etc but i was expecting to see it popping out from the mortar joint.

Is that correct. I am now confused. If the block is 100m and the DPC is 100mm then maybe not.

Mottie · 2 Jul 2020

Surely if you can’t see it, it can be breached?

padstar · 2 Jul 2020

Well that is what I am thinking. So should I just take a few mm from the joint to expose

^woody^ · 2 Jul 2020

NHBC and some other guides state that the DPC should have a "slight" projection - I'm not sure if a dimension is mentioned.

But generally, and historically, its kept back 5mm or so and pointed over and nothing comes of it.

padstar · 2 Jul 2020

Just had a look and it literally sits a few mm behind the pointing . Took a brush to a section and it appeared immediately.

^woody^ · 2 Jul 2020

And now you've took the weathering face off the joint

Celeronmanuk · 2 Jul 2020

Mines been pointed over in places. Nothing bad happened.

stuart45 · 2 Jul 2020

^woody^ said:
NHBC and some other guides state that the DPC should have a "slight" projection - I'm not sure if a dimension is mentioned.

But generally, and historically, its kept back 5mm or so and pointed over and nothing comes of it.

It used to state 5mm each side, which is why you get 112.5 wide for a 102.5 brick.

padstar · 2 Jul 2020

^woody^ said:
And now you've took the weathering face off the joint

Learning valuable lessons as i go

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Should DPC be visable

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