Concrete base over flags - Can this be done?

fulwood · Post: # 25065Post **fulwood** Sun Dec 30, 2007 5:54 pm

I got some great advice off this site a few years back and did an OK DIY job of my patio, using gee-co flags on a full bed of concrete on top of 6" of hardcore. I got the fall right away from the house, but it means the patio isn't a level base. I now want to put a pavilion type gazebo on the patio (the one called the merlin at crownpavilions.com. It's the one without the legs and steps. What I want to know is: Can I put a damp-proof membrane down on my patio flags (to preserve the flags underneath in case I move the structure in the future), make a frame, and then lay a level concrete screed base for the pavilion to sit on? Ta.

Post: # 25071Post **seanandruby** Sun Dec 30, 2007 11:10 pm

as the gazebo has its own floor it will be covering the concrete i presume? then i would go for it. what worries me is you say" you have it falling away from the house". Which leads me to believe the structure will be close to your house? will you have the depth from the D P C to top of slab?

matt h · Post: # 25075Post **matt h** Mon Dec 31, 2007 12:23 am

well spotted sean. minimum depth 150mm required. cant you use a decking floor, particularly if is going to be temporary?:rock:

Post: # 25081Post **seanandruby** Mon Dec 31, 2007 8:29 am

...or just put plynths where the posts are going.

fulwood · Post: # 25096Post **fulwood** Mon Dec 31, 2007 3:11 pm

Thanks peops. The plinth idea under the posts sounds great. They'll have to be different heights as patio isn't level. I never thought of that, but if the floor turns out to be supporting itself, that's great. It will be about 10 foot away from the house do I don't think DP will be affected. There's a few options now. Thanks all.