Patio edges far away from the wall

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?

Asked by Aga on 10th Aug 2021
Expert Trade Answers
Best 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"
Answered on 5th Jan 2022 - Member since Dec 2021 - report
"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."
Answered on 29th Sep 2021 - Member since May 2019 - report
"They have done this as it is less cutting for themselves. If there is any heavy rain it will fill up."
Answered on 13th Aug 2021 - Member since Aug 2021 - report
"It could be they left it like this for French drain but probably just cheated on cutting the slabs"
Answered on 13th Aug 2021 - Member since Dec 2019 - report
"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"
Answered on 11th Nov 2021 - Member since Mar 2019 - report
"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"
Answered on 10th Nov 2021 - Member since Nov 2021 - report
"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"
Answered on 28th Oct 2021 - Member since Sep 2021 - report
"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"
Answered on 10th Jan 2022 - Member since Jan 2022 - report
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