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Perimeter insulation upstands - external walls only or internal walls as well


Hannah82w

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We've built a timber frame on block work foundation walls with block and beam floor. All our internal walls are either built on lower block work walls (it is single storey and some of the internal walls are load bearing/supporting) or directly onto the block and beam floor as we don't intend to change the layout. The section and foundation plan drawings show an insulation upstand around the external walls but do you normally also run this around the internal walls of each room as well? Or should we because of the internal walls being directly on block work or B&B floor?

 

Does the upstand also double up as the expansion joint for the screed, or is that something else entirely?!

 

Thanks!

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On 14/07/2023 at 17:15, Hannah82w said:

We've built a timber frame on block work foundation walls with block and beam floor. All our internal walls are either built on lower block work walls (it is single storey and some of the internal walls are load bearing/supporting) or directly onto the block and beam floor as we don't intend to change the layout. The section and foundation plan drawings show an insulation upstand around the external walls but do you normally also run this around the internal walls of each room as well? Or should we because of the internal walls being directly on block work or B&B floor?

 

Does the upstand also double up as the expansion joint for the screed, or is that something else entirely?!

 

Thanks!


 

We ran ours around the internal panels. I also filled in the voids. 
 

No the upstand doesn’t double up as the expansion joint as it’s too rigid. We fitted a foam strip  around the perimeter and the around the panels. 

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