Author Topic: build my own patio  (Read 5155 times)

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Offline Lisa

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build my own patio
« on: March 17, 2014, 13:35:16 PM »
How hard is it to build a patio?
most recent quote is £600!!!!!

no.


here is the area concerned. all of the top grass area to the outer edge of the wall and the top step.
want it all one level same slabs.


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Offline Lisa

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Re: build my own patio
« Reply #1 on: March 17, 2014, 13:36:25 PM »
I know I need to remove all the grass first.
but I don't believe it should cost £600
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Offline Tāf

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Re: build my own patio
« Reply #2 on: March 17, 2014, 15:47:08 PM »
Type of slabs?

Whatever you do DO NOT DIG DOWN into the soil. Especially since the fill isn't old. It has to be well-compacted or the slabs will settle and go wonky.

Removing grass isn't necessary, just cover it with old carpet or whatever and let it die. Or spray with permanent weedkiller (sodium chlorate) though that will leach and kill every other growing thing it finds.

Slabs are best bought from a Builders Merchant in bulk (keep a few spare for future breakages).

How many sq metres altogether?

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Offline Lisa

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Re: build my own patio
« Reply #4 on: March 17, 2014, 16:41:20 PM »
at just a standard grey slab I need about 77 of them according to last quote.
Today's quote was £530.
we were planning on recycling some of the grass we lifted. Can patch the lower garden and start the rockery base with what we can.
All the quotes have said we need to dig down about 3 inches to fill with hardcore under the patio?
« Last Edit: March 17, 2014, 16:42:42 PM by Lisa »
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Offline fred

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Offline Tāf

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Re: build my own patio
« Reply #6 on: March 17, 2014, 17:08:32 PM »
If you "dig down" you should not actually "dig" but slice off layer by layer with a shovel. If not the earth will be unstable.

You can stabilise with many things: brick dust and cement, aggregate and cement, tamped-down scalpings, etc, etc. The best is http://beta.wickes.co.uk/Granular-Sub-Base-MOT1-Jumbo-Bag/p/224665

When you lay the slabs don't go for the "lay on a bed of sand" method as it is very ustable. Ditto filling the gaps with dry sand..... fill with a bonedry mix of fine sand and cement instead, then sprinkle lightly with water to cause the top layer to set (the rest will set in it's own time when it rains).

Offline Lisa

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Re: build my own patio
« Reply #7 on: March 17, 2014, 17:29:09 PM »
hmmm. my latest quote doesn't appear to have hardcore on it...
...
..
.
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Offline Lisa

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Re: build my own patio
« Reply #8 on: March 17, 2014, 18:03:01 PM »
wow Fred... the cost of hiring the tools would seriously escalate doing it myself.
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Offline Tāf

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Re: build my own patio
« Reply #9 on: March 17, 2014, 18:12:46 PM »
A decent patio on new ground cannot be laid in a rush. The extra weight will cause settling. When I laid the hard standing for the car I removed the excess soil, added hardcore and sharp sand, then spent a season walking over it to compact it down.

The only tools I used were a shovel, a mallet, and a saw (to cut the formers)... plus my back....

Offline Lisa

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Re: build my own patio
« Reply #10 on: June 05, 2014, 15:22:24 PM »
looking more and more likely that I'll end up doing this myself, we keep being let down by builders.
I'm not savouring the prospect.
Working out what's needed, easy
laying hardcore and sand... easy
mortar... and blocks.... making me very nervous. Cutting, mixing and laying right. Does not fill me with joy.
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Offline fred

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Re: build my own patio
« Reply #11 on: June 05, 2014, 17:26:36 PM »
Suspect the trick is to roughen the mortar with the trowel so there is scope to tap the block down with a rubber hammer.  There should be a slight fall away from the house.
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Offline Tāf

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Re: build my own patio
« Reply #12 on: June 05, 2014, 18:17:20 PM »
Because that is "worked land" (ie newly filled hole) you have to add the hardcore and stomp on it for weeks if not months as it WILL settle. Putting slabs on it too early will disappoint you.

But you could loose-lay them on top of the hardcore in the meantime. Tripping hazard though.  :-\

You can mix mortar in small amounts in a bucket with a square-nosed trowel, no need to rush it. You'll need an angle grinder at some point too (great fun), a long spirit level, a rubber mallet, a bottle of woowoo, another bottle of woowoo, and a bit of patience.  It's like putting a filling into a Victoria sandwich with the Womens' Institute watching....

Offline Lisa

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Re: build my own patio
« Reply #13 on: June 05, 2014, 18:58:02 PM »
the hole was dug and filled more than 3 years ago. surely it's solid by now
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Offline Tāf

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Re: build my own patio
« Reply #14 on: June 05, 2014, 19:02:43 PM »
You'd be surprised. A patio is a big weight.

Another method is to lay "sharp" (coarse) sand over the gravel, mixed with a little cement to bind it together. Slabs can then be loose-laid with a dry sand/cement mix brushed into the gaps (it'll set when it rains).

If it does start to sink, just lift the offending slab(s) and add more sand-cement mix underneath.