No MOT, no wacker plate

7 Feb 2008
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United Kingdom
The in-laws want me to run a few slabs along the side of their hot tub. The tub stands on a concrete slab which is 150mm deep.

As I have learnt from this site the correct method would be to use a wacker plate to compact MOT Type 1 to a depth of around 75mm, however;

1/. Jewsons tell me they only sell MOT Type 1 in the big jumbo bags

2/. I can't justify hiring a wacker plate for just a few slabs

Any ideas?

Many thanks.
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remove any vegetation and make sure your on solid bare earth. lay the slabs on a mortar bed on that. it will be fine for foot traffic.
Thanks Thermo,

but that means my mortar bed will be about 115mm deep (150mm - 35mm (depth of slab)?
Get some ballast bags from somewhere, mix it with some cement to make a dry mix, tread that in to build up the height first.
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ah you didnt mention the depth! As per wabbit poos suggestion then! and yes 1:5 will be fine

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