GypFloor SILENT 6.4. Sound insulating floor system. Key facts. Sector Guide

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1 is a sound insulating floor system designed for use in the residential sector. It is specified in conversion or improvement work to upgrade an existing timber joist floor to meet the acoustic requirements of national Building Regulations. It is also used in new-build to improve the internal environment by reducing sound transmission through upper floors. The system employs SIF Floor Channels with integral resilient strips which are fitted over the top of floor joists. Gyproc Plank is cut and fitted between the joists with the cut ends resting on the channel flanges. Isover Modular Roll is laid between the joists to rest on Gypframe Resilient Bars which are fixed to the underside of the joists. Gyproc boards are screw-fixed to the resilient bars to form the ceiling. The floor is completed by screw-fixing floor boarding through Gyproc Plank into one flange of the metal channel section. Key facts Dramatically improves airborne and impact sound insulation of existing timber joist floors Minimal increase in floor depth Used in conversion work and refurbishment to meet acoustic regulations Resilient interface between channel and floor joist Gypframe SIF Floor Channel, Gypframe SIF Floor Channel or Gypframe SIF4 Floor Channel. Gypframe RB Resilient Bar Sector Guide Offices Commercial Retail Sport & Leisure Education Healthcare Industrial Auditoria Custodial Entertainment Residential - Housing Residential - Apartments Residential - High Rise 98

2 T F E enquiries@gyproc.ie COMPONENTS Gyproc board products Gyproc WallBoard,.5, 5mm 900, 00mm Fixing and finishing products Gypframe SIF Floor Screws For fixing floorboards through Gyproc Plank into the Gypframe floor channel flange. Gyproc SoundBloc.5, 5mm 00mm Gyproc Drywall Screws For fixing boards to Gypframe RB Resilient Bars, and Gypframe RB Resilient Bars to timber joists. Gyproc FireLine,.5, 5mm 00mm Gyproc Sealant For sealing air paths to achieve optimum sound insulation. Gyproc Plank 9mm 600mm Gyproc jointing materials For seamless jointing. Glasroc F MultiBoard.5mm 00mm Gyproc Skimcoat, Gyproc Carlite Finish or Gyproc Board Finish To provide a plaster skim finish. Moisture resistant boards are specifed in intermittent wet use areas e.g. shower areas, bathrooms and kitchens. Also available in DUPLEX grades where vapour control is required. pour check is required. Isover Modular Roll For providing acoustic / thermal insulation. Gypframe metal products Gypframe SIF Floor Channel 7mm For joists up to 63mm wide Gypframe SIF Floor Channel 85mm For joists over 75mm and perimeters Gypframe SIF4 Floor Channel 40mm For joists 64mm to 75mm wide Gypframe RB Resilient Bar 99

3 book 6_jan0a:c0 Introduction v3.qxd 5/04/00 9:43 Page 300 SILENT GypFloor INSTALLATION Floor system installation For joists 63mm or less, Gypframe SIF Floor Channel is located centrally over the joists, leaving a 6mm clearance gap at walls. Where joints in channel sections occur, sections are butted together. Where joists run within 30mm of the wall, Gypframe SIF Floor Channel is located in place of Gypframe SIF Floor Channel. Gyproc Plank is cut to a neat (not tight) fit between channels. Flooring is laid across the channels and screw-fixed through the Gyproc Plank to the channel flange on one side only, using Gypframe SIF5 Floor Screws. It is important to ensure that no fixings are allowed to connect the Gypframe floor channels to the joists. Ceiling fixing Gypframe RB Resilient Bars are fixed through their base flange to each joist using Gyproc Drywall Screws. Resilient bar noggings are fixed at perimeters. Isover insulation is laid between joists to rest on the resilient bars. Base layer boards are fixed to resilient bars with their long edges at right angles to the resilient bars. Face layer boards are fixed through to all resilient bars. Select an appropriate screw length to ensure that screws do not contact the joists. When fixing to joists 64mm - 75mm in width, Gypframe SIF4 Floor Channel is used in place of Gypframe SIF Floor Channel. For joists over 75mm width, two Gypframe SIF Floor Channels (suitably overlapped) are installed. 300 For full installation details, refer to the Installation Guide at

4 T F E enquiries@gyproc.ie PERFORMANCE Please refer to section 6. - Introduction - for general considerations. Table - Dimensions and performance Existing basic floor and ceiling Existing floor comprising 95mm x 45mm timber joists at 450mm centres with mm softwood floor boarding. Floor boarding lifted and replaced. Existing ceiling removed UPGRADING Floor boarding lifted and replaced. Existing ceiling retained Comprising of mm softwood floor boarding with Gyproc Plank on Gypframe SIF Floor Channels. 00mm Isover Modular Roll in the cavity. Resilient bars at 450mm centres. Ceiling boards as below. Comprising of mm softwood floor boarding with Gyproc Plank on Gypframe SIF Floor Channels. 00mm Isover Modular Roll in the cavity. GypLyner ceiling framework to joists (old nails may be left in position on underside of joists). Ceiling boards as below Comprising of mm T&G floor boarding (or 0mm square edge boarding topped with 3mm hardboard) with Gyproc Plank on Gypframe SIF Floor Channels. Cavity bridged between joists by.5mm Glasroc F MultiBoard resting on 00mm x.5mm Glasroc F MultiBoard strips screwfixed to each joist flush with bottom edge at 300mm centres. 00mm Isover Modular Roll in the cavity. Ceiling boards as below. Comprising of mm floor boarding with Gyproc Plank on Gypframe SIF Floor Channels. 00mm Isover Modular Roll in the cavity. Ceiling boards as below. Detail Ceiling boards Fire Laboratory sound insulation Performance resistance 4 (00-350Hz) substantiation Airborne Impact report mins R w db L nw db Existing layer of.5mm Gyproc plasterboard 30 (modified) 36 8 C04036 Simulated lath and plaster ceiling (one layer of Gyproc Plank 30 (modified) C04037 and one layer of.5mm Gyproc plasterboard) 3 Simulated lath and plaster ceiling (one layer of Gyproc Plank C04004 and one layer of.5mm Gyproc plasterboard) 3 Existing.5mm plasterboard ceiling overboarded with one C04005 layer of.5mm Gyproc SoundBloc Two layers 5mm Gyproc SoundBloc C04006 Inner layer of Gyproc Plank, outer layer of.5mm Gyproc SoundBloc C0400 Inner layer of Gyproc Plank, outer layer of.5mm Gyproc SoundBloc C54008 Simulated lath and plaster ceiling (one layer of Gyproc Plank G0403 and one layer of.5mm Gyproc plasterboard) 3 Existing.5mm plasterboard ceiling overboarded with one C04007 layer of 5mm Gyproc FireLine Two layers of 5mm Gyproc FireLine C0400 The fire resistance and sound insulation performances are for imperforate ceilings with all joints taped and filled in accordance with Gypsum Industries recommendations. The quoted performances are achieved only if Gypsum Industries components are used throughout, and the Company s fixing recommendations are strictly adhered to. Any variation in the specification should be checked with Gypsum Industries. Minimum 50mm width. 3 Linings to simulate a lath and plaster ceiling in good condition. 4 Board joints must be reinforced with Gyproc Paper Joint Tape for the quoted fire resistance periods to be achieved. Please refer to section. for full details. 30

5 Environmental is unsuitable for use in areas subject to continuously damp or humid conditions. Plasterboards are not suitable for use in temperatures above 49ºC but can be subjected to freezing conditions without risk of damage. Fire protection For reaction to fire classifications for Gyproc and Glasroc boards please refer to Section.. Fire resistance The fire resistances given in Table are for imperforate ceilings tested to BS 476: Part 8: 97, or BS 476: Part : 987, or assessments based on these tests. Sound insulation The airborne and impact sound ratings given in Table are for imperforate ceilings and have been tested in accordance with BS EN ISO 40-3: 995, and rated in accordance with BS EN ISO 77-: 997. Airtightness is essential for optimum sound insulation. While most junctions will be sealed with standard jointing materials, gaps at the perimeter of the floor and ceiling, and other small airpaths, can be sealed using Gyproc Sealant. The sound insulation data quoted was measured in the absence of flanking transmission. The performance of the floor in practice will generally be governed by flanking transmission. Site measurements on installed between flats have indicated that the level of sound insulation expected from separating floors and their surrounding structure can be achieved. For site measurement data, please contact the Technical Sales Department. DESIGN Please refer to section considerations Introduction - for general Planning - key factors The system will add 7mm to the level of the top of the joists. The finished surface of the applied ceiling linings will be 48mm from the underside of the joists when Gypframe RB Resilient Bar and a layer of Gyproc Plank plus.5mm SoundBloc are applied. When two layers of 5mm board are specified that dimension will be 46mm. Ceiling linings should be fixed prior to any installation of dry lining or plastering on walls. If this is not possible, ceiling linings should properly butt against the wall surface. In refurbishment work the level of existing joists should be checked. If there is misalignment, consideration should be given to using a GypLyner or CasoLine MF suspended ceiling to support the ceiling boards, and they should be level and straight for the flooring applications. Structural The system is primarily intended for timber floors with an intensity of distributed load of up to 5.0kN/m, and a concentrated load of 4.5kN. An increase in the mass of the floor will result from upgrading. The load capacity of the supporting floor joists should therefore be checked, with due consideration to the effects of lateral buckling and the need for intermediate restraints. This may be particularly important where the system is to be used in conjunction with engineered timber I joists. Engineered Timber I Joists Please contact the joist manufacturer for advice. Services The installation of services within the floor zone should be carried out so as to allow easy access from above and should, where possible, follow the line of the floor joists. The use of square edge flooring will allow easy access to services. Services should be installed in accordance with all available standards, guidelines and recommendations. Finishing Please refer to section.5 - Finishing Coat Plasters, section. - Jointing and section.5 - Decorative effects. Estimating The estimated construction time is 0.5m / hour ready for finishing. Gypsum Industries acknowledges the help of TJM Europe in preparing this statement. 30

6 T F E enquiries@gyproc.ie CONSTRUCTION DETAILS Fig - Cut-away floor plan (chipboard flooring) Fig - Cut-away ceiling plan (.5mm x 00mm x 700mm Gyproc SoundBloc over Gyproc Plank fixed to Gypframe RB Resilient Bars) 450mm 303

7 Fig 3 - Typical section through floor Fig 4 - Section through floor - joist width over 75mm Fig 5 - Perimeter junction Fig 6 - Typical hearth construction floor boarding plugged and screwed through packer into concrete Fig 7 - Non-loadbearing partition (space division) sited over joists 304

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