Once a sandbase is laid I will then be laying 38mm depth paving slabs aligning to the top of the lowest black brick?
I ask as I have excavated my patio too deep and 50mm of MOT Type 1 has only come up so far:
Does this subbase need more mot type 1 or sand?
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Pipps
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Should I start filling up this 35m² excavated garden with a sharp sand base now, or does it need more MOT Type 1 aggregate laid roughly up to the top of the breezeblock foundation level first?
Once a sandbase is laid I will then be laying 38mm depth paving slabs aligning to the top of the lowest black brick?
I ask as I have excavated my patio too deep and 50mm of MOT Type 1 has only come up so far:
Once a sandbase is laid I will then be laying 38mm depth paving slabs aligning to the top of the lowest black brick?
I ask as I have excavated my patio too deep and 50mm of MOT Type 1 has only come up so far:
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Tony McC
- Site Admin
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- Location: Warrington, People's Republic of South Lancashire
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50mm of "MOT" is nowhere near sufficient. The minimum usable depth of a DTp1 (the correct name for what you call MOT) is 100mm. Read why here
So: 38mm flags + 25-40mm mortar bed gives you a pavement layer depth of 63-78mm. You want to be 150mm minimum below DPC, so your sub-base should be around (150 + 70) 220mm below DPC.
So: 38mm flags + 25-40mm mortar bed gives you a pavement layer depth of 63-78mm. You want to be 150mm minimum below DPC, so your sub-base should be around (150 + 70) 220mm below DPC.
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