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Posted: Sun Aug 12, 2007 11:11 am
by mickallen
I am building a patio at the back of my house, I have to raise it about 12" at one side where the waste water pipe runs down the side of the house at a depth of about 3". can I just cover this pipe with hardcore/grit sand/slabs or do I have to encase it in concrete, or any other suggestions would be appreciated.
Thanks
Posted: Sun Aug 12, 2007 4:15 pm
by seanandruby
assuming it is 40ml waste? id just bring it in with your sub base and, or bedding. just go careful with the wacker.
Posted: Sun Aug 12, 2007 9:46 pm
by matt h
just watch the height against the dpc of the building.. finished level 150mm below dpc or you'll get rising damp
Posted: Mon Aug 13, 2007 10:44 am
by mickallen
Thanks for your replies
Sean, Sorry I am new to all this building speak what do you mean by 40 ml waste? I have attached a photo to help me explain.
Posted: Mon Aug 13, 2007 11:22 am
by andpartington
you will be ok just covering the pipe with the sub base (mot) go easy with the wacker
you will then be able to insert a lent of pipe and elbow to raise the gully to the finished hight.
sean was referring to the black sink waste which is 40mm die hence 40mm waste 
where is you dpc because as said you need to be 150 below ???
andy
Posted: Mon Aug 13, 2007 11:36 am
by mickallen
Thanks Andy,
The DPC is about a foot higher than the top of the photo, so will be alright with that