building on existing patio


Postby 60minuteman » Fri Sep 07, 2007 3:25 pm

I have a block patio and it slops quite badly 5m x 6m. I wish to build a deck and an L shaped seating area out of blocks which will then be rendered and painted. Should I dig the patio up first and dig foundation trenches? or should i level it out and use it as the foundations?
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Postby loomo » Sun Sep 09, 2007 6:56 am

yeah dig it up and put a foundation in. just dig it down till you get to a stable footing and obviously making it wide enough for the blockwork. leave a bit of scarcement either side,ie, if it's nine inch block then have four inch of concrete remaining either side.
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Postby thedoctor » Sun Sep 09, 2007 10:10 am

See our project on foundations to get the principle here. The job will only be as good as its foundation.
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