Laying Slabs

Gwillim

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Sep 3, 2019
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Industry standard is 1:80 I believe so one in every 80 of whatever unit you use to calculate, so 250 cm divided by 80 is 3.125 but not sure if this would be to great over only 2.5m but i'm sure a professional will be along any moment ;) (y)
 

Dave

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Im laying a patio at the moment on top of block and beam decking and working on 30mm over 2400mm

The problem if you put too great a fall on it will be noticeable when standing on it, or placing a table on.
Too little and you risk pooling when it rains.
 

mickthechippy

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as a carpenter, I was taught and have always worked to a ratio of a minimum of 1 in 50 for any rainfall run off
 

Gwillim

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Shame your so far away Dave or could of offered you a load of work on the house we just bought
 

Dave

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After Brexit I'll buy your house off you :D

To be fair I don't like laying flags that much nowadays, too much bending and kneeling, much prefer the construction side and winding up other trades, especially chippies ;)
 

Duster

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Nov 2, 2017
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1:60 is spot on for slabs , same as rainwater drainage ? , 14-17 mm fall per metre if I remember correctly
 
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