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Floor base in cavity masonry external walls
3.71NI-wide·Technical Booklet G Resistance to the Passage of Sound
The floor base (excluding any screed) should be built into a cavity masonry external wall and carried through to the cavity face of the inner leaf. The cavity should not be bridged.
soundexternal-spaceseparating-floorFloor 2.2B joint positioning
3.72NI-wide·Technical Booklet G Resistance to the Passage of Sound
Where floor 2.2B is used and the planks are parallel to the external wall the first joint should be a minimum of 300 mm from the cavity face of the inner leaf (see Diagram 3.16).
soundexternal-spaceseparating-floorCavity wall with timber frame inner leaf
3.74NI-wide·Technical Booklet G Resistance to the Passage of Sound
Where the external wall is a cavity wall – (a) the outer leaf of the wall may be of any construction; (b) the cavity should be closed with a cavity stop; and (c) the wall finish of the inner leaf of t
soundexternal-spaceseparating-floorSolid masonry external wall junctions
3.75NI-wide·Technical Booklet G Resistance to the Passage of Sound
Seek specialist advice.
soundexternal-spaceseparating-floorInternal framed walls
3.76NI-wide·Technical Booklet G Resistance to the Passage of Sound
There are no restrictions on internal framed walls meeting a type 2 separating floor.
soundseparating-floorFloor base continuity through internal masonry walls
3.77NI-wide·Technical Booklet G Resistance to the Passage of Sound
The floor base should be continuous through, or above an internal masonry wall.
soundseparating-floorMass requirement for internal walls connected to separating floors
3.78NI-wide·Technical Booklet G Resistance to the Passage of Sound
The mass per unit area of any loadbearing internal wall or any internal wall rigidly connected to a separating floor should be at least 120 kg/m2 excluding finish.
soundseparating-floorFloor type 2.2B – Junctions with separating wall type 1
3.84NI-wide·Technical Booklet G Resistance to the Passage of Sound
A separating floor type 2.2B base (excluding any screed) should not be continuous through a separating wall type 1 (see Diagram 3.18).
soundseparating-floorwall-type-1Floor base – Junctions with separating wall type 2 (cavity masonry)
3.85NI-wide·Technical Booklet G Resistance to the Passage of Sound
The floor base (excluding any screed) should be carried through to the cavity face of the leaf. The cavity should not be bridged.
soundseparating-floorwall-type-2cavity-masonryFloor type 2.2B – Planks parallel to separating wall type 2
3.86NI-wide·Technical Booklet G Resistance to the Passage of Sound
Where floor type 2.2B is used and the planks are parallel to the separating wall the first joint should be a minimum of 300 mm from the cavity face of the leaf.
soundseparating-floorwall-type-2cavity-masonryFloor type 2.1C – Junctions with separating wall types 3.1 and 3.2 (solid masonry core)
3.87NI-wide·Technical Booklet G Resistance to the Passage of Sound
A separating floor type 2.1C base (excluding any screed) should pass through separating wall types 3.1 and 3.2 (see Diagram 3.19).
soundseparating-floorwall-type-3masonryFloor type 2.2B - Continuity through separating wall type 3
3.88NI-wide·Technical Booklet G Resistance to the Passage of Sound
A separating floor type 2.2B base (excluding any screed) should not be continuous through a separating wall type 3.
soundseparating-floorfloor-type-2.2bFloor type 2.2B with separating wall type 3.2 - Joint positioning
3.89NI-wide·Technical Booklet G Resistance to the Passage of Sound
Where separating wall type 3.2 is used with floor type 2.2B and the planks are parallel to the separating wall the first joint should be a minimum of 300 mm from the centreline of the masonry core.
soundseparating-floorfloor-type-2.2bJunctions with separating wall type 3.3 - Floor base and cavity treatment
3.91NI-wide·Technical Booklet G Resistance to the Passage of Sound
The floor base (excluding any screed) should be carried through to the cavity face of the leaf of the core. The cavity should not be bridged.
soundseparating-floorseparating-wall-type-3.3Floor type 2.2B with separating wall type 3.3 - Joint positioning
3.92NI-wide·Technical Booklet G Resistance to the Passage of Sound
Where floor type 2.2B is used and the planks are parallel to the separating wall the first joint should be a minimum of 300 mm from the inner face of the adjacent cavity leaf of the masonry core.
soundseparating-floorfloor-type-2.2bseparating-wall-type-3.3Junctions with separating wall type 4 - timber frames with absorbent material
3.93NI-wide·Technical Booklet G Resistance to the Passage of Sound
Seek specialist advice.
soundseparating-floorseparating-wall-type-4