Laying a decking over uneven slabs

Decking over uneven slabs

  • Decking joist gap

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  • How to get over uneven slabs when decking

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Hi, hopefully someone can help me, I'm laying a 3.6m sq decking over a old uneven patio area, I'm using 6*2 joists but in large areas the joist doesn't touch the floor, what can I use to pack up between the old slabs and joist ? Could I use slate ? I know builders use this under RSJ. In places I can get my hand under
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IMG_20150713_203205.jpg
 
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You could scribe and cut/plane the timber to suit the slabs, that way you get all the timber to come into contact with all. The slabs, really easy.
 
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Concrete posts at each corner then build the deck suspended off the floor.

Will help prevent damp issues too.
 

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