Patio drainage next to house

[sinkorswim]

Hi

Water on our new patio appears to be draining along the outside brick wall of our house (outside the lounge) due to the slope of the entire patio. The paving in this area seems to be fairly horizontally flat rather than tilting away from the property. The rain water is supposed to drain into an aco channel but this seems to be marginally higher than the end paving slab so some slabs have shallow pooled water against the house. We are concerned that the brickwork is being saturated every time that it rains. After heavy rain a few weeks ago, a hole appeared in the pointing and the mortar was saturated to touch. What other damage might be occurring? Does this look correct? Should we be concerned about this?

The remainder of the patio against the house wall (outside the kitchen) does have a minor slope away from the house. It is at least two bricks below the DPC.

The aco drainage channel slopes away from the house into the main drain but is open at the higher end. We are also concerned that water might spill backwards against the house during heavy/prolonged rain?

What can be done to fix all this? Is there anything that can be done in the short term before a permanent fix can be carried out?

Thanks in advance

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[Newboy]

Looks as if the finished patio surface is level with the DPC - it should be at least two courses below.

It should also be falling away from the building not towards it.

With the amount of water pooling against the house (your second photo) I would be concerned about water ingress.

Who laid the new patio?

If a 'professional job' then I'd get them back to sort it out quick.

 

[cotswoldbuilders]

Or the drainage channel needs to run full length of house, cant see the point in the small section at the end.

 

[Bouba]

Second cotsworld builders. Had a similar problem, solved by running full length of aco drain.