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- 22 Sep 2019
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Hi
We want to extend our raised patio over the adjacent flower bed. For this we have build a retaining wall enclosing the flower bed. The maximim depth of the void is approx 600mm . We will lay sandstone on wet mortar.
The next step is preparing the sub-base. I see the following options for fill up:
1) MOT 1 and compacting
2) clean stone. I have already started with some small gravel along the edge. Next fill up will be 20 or 40mm clean stone
3) concrete
I prefer to go with option 2 since it seems to be easiest and cleanest. Do you have any experience with such a sub-base? Do I need to consider any membrane?
Cheers
We want to extend our raised patio over the adjacent flower bed. For this we have build a retaining wall enclosing the flower bed. The maximim depth of the void is approx 600mm . We will lay sandstone on wet mortar.
The next step is preparing the sub-base. I see the following options for fill up:
1) MOT 1 and compacting
2) clean stone. I have already started with some small gravel along the edge. Next fill up will be 20 or 40mm clean stone
3) concrete
I prefer to go with option 2 since it seems to be easiest and cleanest. Do you have any experience with such a sub-base? Do I need to consider any membrane?
Cheers