Patio edges far away from the wall

Question

My builders did the paving stones patio, edges fixed in the mortar. However, they didn't put the edging aligned with the house but 10-20cm away from the wall (different distance in different places). I'm worried that in case of rain it's going to fill with water. It seems to me like they squared it so it was easier for them to lay it and they don't have to cut it. They say that's the reason it's supposed to be done, but no logical explanation. I'm not a specialist, but is there any other reason why it was done this way?

Jack · Accepted Answer

Hi, if you lay edgings on a patio up to the house wall it's good practice to lay them about 100mm away from the house wall, and I would have advised using decorative gravel to match the patio, this prevents damp from getting into your house wall.

Thomas · Answer

Any edging along the house wall can be done 2 ways it can be laid flush against the wall as long as it's about 100 to 150mm below the damp proof course and if you lay above the damp proof  course you need to lay the edging at a minimal of 300mm away from the wall with a clean stone behind to let the water run clear from the damp proof course

Stephen · Answer

They have done this as it is less cutting for themselves. If there is any heavy rain it will fill up.

Jason · Answer

It could be they left it like this for French drain but probably just cheated on cutting the slabs

Michael · Answer

They are between the ending stone and property should be filled with stone really similar idea behind a french rain to stop sleep as back against the property

Simon · Answer

What is the height of the paving? It has to be a minimum of 150mm below damp proof membrane or will cause damp inside house maybe that's why they've left a gap for water to soak away

David · Answer

Sounds like they have done this as easier for them as 10 - 20 cm is not sufficient for a French drain and it has been pointed and the flags fall to the edgings will more than likely back up with heavy rain

Lorcan · Answer

Hi this should not be an issue but a good way to help prevent damage from rain is also pea shingle acts as a drainage

Patio edges far away from the wall

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