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Jetfloor detail


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Jetfloor is now mostly in - the final insulation will go in later.

The tricky part was the positioning of the large (420kg - we have a span of 5.5m) ground beams. We hired a 17m telehandler for the day, but lining it up so it was central to the building was a problem. It also tended to nip the dpc in places, resulting in lots of to-ing and fro-ing. The insulation thickness will vary between 80mm above the beams to 230mm between them. With a P/A (perimeter to area) ratio of 0.46, this results in an overall U value of 0.15.

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Is 150mm underneath standard? Just looked at my plans and it states a 225mm minimum void

I'm sure I read somewhere about putting a layer of hardcore down to help drainage and also weed membrane????

Edited by Vijay
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18 hours ago, Vijay said:

Is 150mm underneath standard? Just looked at my plans and it states a 225mm minimum void

I'm sure I read somewhere about putting a layer of hardcore down to help drainage and also weed membrane????

When we did the renovation and extension on our last place we left bare earth. Nothing is ever likely to grow.

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