The Brew Cabin

Posted: **Thu Jun 28, 2007 2:05 pm**

Folks,

I've now got my MOT down, for my patio, but not yet compacted. I'm going to use a "jumping jack" as per the advice given to me here ...

Given that the MOT is spead at approx 1cm above what would be the ideal finished height when it's compacted, do I need to add more before compaction? (it's approx 4 inches thick all over at the moment)

It's based on laying the paving, (1" thick), on 2" of sand/cement bedding, so I need the top of the MOT to be 3" below the top of the finished surface.

The picture shows the site;

The reason I ask is that I had delivered 4 jumbo bags and I've used 3. The 4th is untouched and I think I can get the supplier, (Jewson) to take the last one back. (If they don't then they definitely wont be getting the order for the sand/cement and paving!)...

But I don't want to get rid of it if I'm going to need more.

Thanks in advance!

Posted: **Sat Jun 30, 2007 9:03 am**

Hmmmm seeing those brick edging course there, I wouldn't be too keen to use a jumping jack on that. I'd use a decently big plate compactor. If you aren't used to using a JJ, it would be very easy to inadvertantly hit a brick.

That type1 will go down a hell of a lot more than 10mm - it does vary of course, but I'd allow at least 35-30mm to go down, if not more.

Posted: **Sat Jun 30, 2007 11:34 am**

Thanks.

I'd practise near the middle first, working outward, untill I got the hang of it.

If I do break one of the edgings I've a few spare... but thanks, I'll look out for that happening.

While contemplating other things I got rid of the extra... swapped it for a jumbo bag of sharp sand... looks like I might need another bag of MOT after all!

I'll compact it and see what happens... if it really goes down that much I might need 2 more!

As it happens we've still not decided on the final top surface yet... oh for a decision from her! It might be that we end up with a thicker flag anyway.

Thanks

Posted: **Sat Jun 30, 2007 3:09 pm**

Maybe put a temporary section of planking 'edge-on' along the inside of the edging course to provide a bit of a fence that the JJ cannot jump over - it'll bump along it instead.

Posted: **Sat Jun 30, 2007 3:50 pm**

Good idea!
Thanks.

Posted: **Sat Jun 30, 2007 4:20 pm**

If you knocked a couple of bits together in an 'Offset-T' then you could rest it on the edging and wouldn't have to dig it in to get it to stand up ...

Posted: **Sat Jun 30, 2007 11:34 pm**

..............aslong as the edges of the stone are nicely down.....

Something you learn as a roller driver.....keep the edges down and the middle up!:p

Posted: **Sun Jul 01, 2007 12:58 pm**

Thanks folks.

Good ideas!

The Brew Cabin

How much compaction? - What's the height reduction?