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Selecting Loadbearing Masonry Floors

Floor Structure Resilient system External wall inner leaf Thickness Robust Detail
Precast
plank
Floating
screed
Aircrete* 358.7mm E-FC-4
362.7mm E-FC-5
389.7mm E-FC-8
355.7mm E-FC-12
383.5mm E-FC-13
361.2mm E-FC-14
383mm E-FC-16
390mm E-FC-17
Lightweight aggregate **
Dense aggregate ***
Besblock Star Performer
358.7mm E-FC-4
362.7mm E-FC-5
389.7mm E-FC-8
362.7mm E-FC-11
355.7mm E-FC-12
383.5mm E-FC-13
361.2mm E-FC-14
357.7mm E-FC-15
383mm E-FC-16
390mm E-FC-17
Plasmor Aglite Ultima 358.7mm E-FC-4
Timber
floating floor
Lightweight aggregate ** 257mm E-FC-1
Dense aggregate***
Besblock Star Performer
Bonded
resilient layer
Aircrete* 355.5mm E-FC-9
Lightweight aggregate **
Dense aggregate***
Besblock Star Performer
Beam and Block Floating screed Dense aggregate*** 363.2mm E-FC-6
Timber FFT Dense aggregate*** 383mm E-FC-7
Insitu-poured Bonded
resilient layer
Lightweight aggregate**
Dense aggregate***
Besblock Star Performer
343mm E-FC-10

KEY B.Regs
+ 3 dB
+ 5 dB
* Aircrete 450-800kg/m3
** Lightweight aggregate 1350-1600kg/m3
*** Dense aggregate 1850-2300kg/m3

Thickness quoted is the minimum possible to comply with the full Robust Details specification including floating floor treatment and ceiling treatment.

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