I always thought you were meant to have at least some kind of “channel” if you’re patioing up close to the dpc. But yeah I guess you’re right. The 150mm thing still gets specced all the time by BC for cavity walls so I guess they still enforce it?
The Magic 8 Ball might say so but I don't think so , the cavity is to prevent moisture passing from the outer to inner leaf , the horizontal dpc is to stop damp rising up from the ground , as recommended by building control , NHBC and every architect as far as I know.In and case, "150mm below DPC" is an anachronism to the time of solid walls. And it has no affect on cavity walls due to what is known as .... a cavity.
There is no '75 whatever', it is 150mm.Wherever you’re not meeting your 75/150/whatever ground level below dpc rule
So if damp gets above the DPC on the outer leaf where does it go, and how does it affect the inner leaf?The Magic 8 Ball might say so but I don't think so , the cavity is to prevent moisture passing from the outer to inner leaf , the horizontal dpc is to stop damp rising up from the ground , as recommended by building control , NHBC and every architect as far as I know.
I know the BR figure is 150mm, we all know that, the conversion has progressed beyond that though, so quoting and correcting that part of my response doesn’t really help.There is no '75 whatever', it is 150mm.
Brickwork above dpc can get damp when it rains and dry out in drier conditions because it isn't in permanent contact with the ground. The horizontal dpc is a barrier to prevent rising damp going up any further . No offence to Magic 8 ball but I have never met a single architect, building surveyor, BCO, NHBC surveyor/inspector, construction manager, SE, builder or bricklayer who doubted the use of horizontal dpc's in walls , and I have dealt with quite a few of those sort of people, so I think I will stick with my theory on dpc's.So if damp gets above the DPC on the outer leaf where does it go, and how does it affect the inner leaf?
Compare with damp running down the outer leaf and settling on top of the DPC on the outer leaf. What happens to that?
Magic 8 ball says "Without a doubt"
What does the b o l l o c k s refer toB0llox.
I’ve been posting prolifically this evening because I’ve had a skin full.
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