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Selecting Timber Walls

Sheathing to cavity face Cavity Width Cavity Fill Thickness   Robust Detail
         
No sheathing
or optional
partial sheathing
min.50mm between
stud frames
Generic 303mm   E-WT-1
 
None allowed 303mm   E-WT-3
 
         
Fully sheathed or extensive part sheathing min.50mm between
sheathing faces
Generic 303mm   E-WT-2
 
Fully sheathed min.60mm between
sheathing faces
None allowed 303mm   E-WT-4
 
     
 
KEY   B.Regs
          + 3 dB
            + 5 dB
        Cavity fill is optional   + 8 dB

Thickness quoted is the minimum possible to comply with the full Robust Details specification including finishes.

A skim coat would be in addition.

Deeper studs will increase this dimension.

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for Floor/Wall Combinations

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for Selecting Your Robust Details