Posted: Mon Aug 10, 2009 1:53 pm
I want to replace my patio-unfortunately its surrounded on three sides and I'm concerned about run-off and pooling. The patio is an 8M x 3M rectangle with the long sides comprising of the house wall and a retaining garden wall, one short side is my nieghbours extension the opposite side is open to the drive. After removing the old patio we found a concrete base had been layed and after checking the levels in both directions we discovered that the base runs diagonally out of level with the only drain ( this is situated in the corner with our house wall and the drive and appears to be the highest point by about 25-30mm). We have 150mm - 200mm between the base and our house wall DPC and about 250mm on the nieghbours extention wall DPC.
My main fear is that if I lay a new patio as is, any run-off will pool between the garden wall and my nieghbours extension the only other sollution I can think off is to lay the patio sloping towards my house wall and install a proper surface drain parallel to my housewall running off into the existing drain, or, jackhammer the concrete base up and start from scratch - something I'm trying to aviod as it appears to be very thick in places ! Any ideas please
My main fear is that if I lay a new patio as is, any run-off will pool between the garden wall and my nieghbours extension the only other sollution I can think off is to lay the patio sloping towards my house wall and install a proper surface drain parallel to my housewall running off into the existing drain, or, jackhammer the concrete base up and start from scratch - something I'm trying to aviod as it appears to be very thick in places ! Any ideas please
