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Level patio and sloped ground

_Sam_
_Sam_ Posts: 316 Forumite
Fifth Anniversary 100 Posts Name Dropper
Our new bungalow is on a bit of a slope from left to right, so if I wanted to have a level patio at the back, at one side of the bungalow it would be level with the existing ground, and then would have to be gradually raised as it extends to the other side of the bungalow. 

From what I understood building retaining wall for the patio could be expensive, so I thought to have as much of it as I can on the ground, and then "blend in" composite decking to continue to the other side of the house. So I'm wondering at what height from the ground does a retaining wall become necessity?
Gas: warm air central heating, instant water heater, Octopus tracker
Electricity: 3kw south facing solar array, EV, Octopus intelligent

Comments

  • _Sam_
    _Sam_ Posts: 316 Forumite
    Fifth Anniversary 100 Posts Name Dropper
    By retaining wall I mean something like this: 
    Gas: warm air central heating, instant water heater, Octopus tracker
    Electricity: 3kw south facing solar array, EV, Octopus intelligent
  • stuart45
    stuart45 Posts: 5,217 Forumite
    Seventh Anniversary 1,000 Posts Name Dropper
    How high would the wall need to be? 150mm for example could be a single brick thick so shouldn't cost too much.
  • FreeBear
    FreeBear Posts: 18,366 Forumite
    Tenth Anniversary 10,000 Posts Name Dropper Photogenic
    How much of a difference in height is there ?
    Any language construct that forces such insanity in this case should be abandoned without regrets. –
    Erik Aronesty, 2014

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  • _Sam_
    _Sam_ Posts: 316 Forumite
    Fifth Anniversary 100 Posts Name Dropper
    edited 20 June 2022 at 6:41PM
    Approximately 500mm difference (and there is also a slope away from the bungalow though less steep it seems).
    Gas: warm air central heating, instant water heater, Octopus tracker
    Electricity: 3kw south facing solar array, EV, Octopus intelligent
  • stuart45
    stuart45 Posts: 5,217 Forumite
    Seventh Anniversary 1,000 Posts Name Dropper
    Personally I would build a wall. As soon as the patio gets above the ground it will look untidy. 
  • Megaross
    Megaross Posts: 183 Forumite
    100 Posts First Anniversary
    Your patio should have a very slight slope away from the property, not be level else it won't drain properly.

    Anyway, you could trench it and build a sleeper retaining wall. Then level off the slope where the patio is going when you go to dig down for the patio.

    Only thing to be wary of is you really ought to install drainage at the drop - a french drain is usual practice. Realistically for a small one you should get away with it with good draining soil but for anything decent sized definitely consider french drain.
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