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Dwellings formed by material change of use
0.2NI-wide·Technical Booklet G Resistance to the Passage of Sound
Section 4 – Dwellings formed by material change of use, gives one wall treatment, two alternative floor treatments and one stair treatment which, if properly designed and constructed, should provide r
dwellingmaterial-change-of-usesoundFlanking transmission control for stair treatment
4.10, 4.11NI-wide·Technical Booklet G Resistance to the Passage of Sound
In all cases it may be necessary to control flanking transmission in order to achieve the performance standards set out in Table 1a of the section entitled "Guidance - Performance and introduction to
soundstairsmaterial-change-of-useflanking-transmissionPre-completion testing for converted units
4.12NI-wide·Technical Booklet G Resistance to the Passage of Sound
Significant differences may frequently occur between the construction and layout of each converted unit in a development. District councils should have regard to the guidance in Section 1 when decidin
soundmaterial-change-of-useSound insulation for historic buildings undergoing material change of use
4.13NI-wide·Technical Booklet G Resistance to the Passage of Sound
For some historic buildings undergoing material change of use, it may not be practicable to improve the sound insulation to the performance standards set out in Table 1a of the section entitled "Guida
soundmaterial-change-of-useconservationStructural assessment for wall and floor treatments
4.14NI-wide·Technical Booklet G Resistance to the Passage of Sound
Wall and floor treatments will impose additional loads on the existing structure. The structure should be assessed to ensure that the additional loading can be carried safely, with appropriate strengt
soundstructuralmaterial-change-of-useTreatment of penetrations through separating elements
4.15NI-wide·Technical Booklet G Resistance to the Passage of Sound
Floor or wall penetrations, such as ducts or pipes, passing through separating elements in conversions can reduce the level of sound insulation. Guidance on the treatment of floor penetrations is give
soundmaterial-change-of-useRemedial work to existing construction before floor treatment
4.16NI-wide·Technical Booklet G Resistance to the Passage of Sound
Before a floor treatment is applied appropriate remedial work to the existing construction should be undertaken as described in paragraphs 4.17 and 4.18.
soundmaterial-change-of-useExisting timber and concrete floor specifications
4.17NI-wide·Technical Booklet G Resistance to the Passage of Sound
If the existing floor is timber then gaps in floor boarding should be sealed by overlaying with hardboard or filled with sealant – (a) Where floor boards are to be replaced, boarding should have a min
soundmaterial-change-of-useFlanking transmission and wall linings in conversions
4.18NI-wide·Technical Booklet G Resistance to the Passage of Sound
Extensive remedial work to reduce flanking transmission may also be necessary to achieve the performance standards set out in Table 1a of the section entitled "Guidance - Performance and introduction
soundmaterial-change-of-useFloating floor edge isolation
4.38NI-wide·Technical Booklet G Resistance to the Passage of Sound
For floating floors, carry the resilient layer up at all room edges to isolate the floating layer from the wall surface.
soundmaterial-change-of-useFloating floor gap and sealant
4.39NI-wide·Technical Booklet G Resistance to the Passage of Sound
For floating floors, leave a small gap (approximately 5 mm) between the skirting and floating layer and fill with a flexible sealant.
soundmaterial-change-of-useCeiling perimeter sealing
4.40NI-wide·Technical Booklet G Resistance to the Passage of Sound
The perimeter of any new ceiling should be sealed with tape or caulked with sealant.
soundmaterial-change-of-useJunction treatment for external or loadbearing walls
4.42NI-wide·Technical Booklet G Resistance to the Passage of Sound
Where there is significant flanking transmission along adjoining walls then improved sound insulation can be achieved by lining all adjoining masonry walls with either – (a) an independent layer of pl
soundmaterial-change-of-useWall mass exemption from lining requirement
4.43NI-wide·Technical Booklet G Resistance to the Passage of Sound
Where the adjoining masonry wall has a mass per unit area greater than 375 kg/m2 then such lining may not be necessary, as it may not give a significant improvement.
soundmaterial-change-of-use