1. home and garden
2. home furnishings
3. lamps and lighting

SILENT
GypFloor
Sound insulating floor system
book 6_jan10a:c01 Introduction v3.qxd 15/04/2010 19:43 Page 298
GypFloor
SILENT
GypFloor SILENT 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
1
2
1
Gypframe SIF1 Floor Channel, Gypframe SIF2 Floor
Channel or Gypframe SIF4 Floor Channel.
2
Gypframe RB1 Resilient Bar
298
✔
✔
✔
✔
Resid
e
High ntial Rise
Resid
e
Apar ntial tmen
ts
Resid
e
Hous ntial ing
Enter
tainm
ent
Custo
dial
✔
Audit
oria
✔
Indus
trial
✔
Healt
hcare
✔
Educ
ation
Retail
✔
Sport
& Leis
ure
Comm
ercial
6.4
Offic
es
Sector Guide
book 6_jan10a:c01 Introduction v3.qxd 15/04/2010 19:43 Page 299
E enquiries@gyproc.ie
COMPONENTS
Gyproc board products
Fixing and finishing products
Gyproc WallBoard 1, 2
Thickness
Width
12.5, 15mm
900, 1200mm
Gyproc SoundBloc 1
Thickness
Width
12.5, 15mm
1200mm
Gyproc FireLine 1, 2
Thickness
Width
12.5, 15mm
1200mm
Gyproc Sealant
For sealing air paths to achieve optimum
sound insulation.
Gyproc Plank
Thickness
Width
19mm
600mm
Gyproc jointing materials
For seamless jointing.
Glasroc F MultiBoard
Thickness
Width
12.5mm
1200mm
Gyproc Skimcoat, Gyproc Carlite Finish or
Gyproc Board Finish
To provide a plaster skim finish.
1
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.
2
GypFloor
SILENT
F 00353 1 623 7054
Gypframe SIF Floor Screws
For fixing floorboards through Gyproc Plank
into the Gypframe floor channel flange.
Sound insulating floor system
T 00353 1 629 8400
Gyproc Drywall Screws
For fixing boards to Gypframe RB1
Resilient Bars, and Gypframe RB1 Resilient
Bars to timber joists.
Isover Modular Roll
For providing acoustic / thermal insulation.
Gypframe metal products
Gypframe SIF1 Floor Channel
Width
127mm
For joists up to 63mm wide
Gypframe SIF2 Floor Channel
Width
85mm
For joists over 75mm and perimeters
Gypframe SIF4 Floor Channel
Width
140mm
For joists 64mm to 75mm wide
Gypframe RB1 Resilient Bar
6.4
299
book 6_jan10a:c01 Introduction v3.qxd 15/04/2010 19:43 Page 300
SILENT
GypFloor
Sound insulating floor system
www.gyproc.ie
INSTALLATION
Floor system installation
For joists 63mm or less, Gypframe SIF1 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 SIF2 Floor Channel is located in place of
Gypframe SIF1 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 RB1 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 SIF1 Floor
Channel. For joists over 75mm width, two Gypframe SIF2
Floor Channels (suitably overlapped) are installed.
6.4
300
For full installation details, refer to the Installation Guide at www.gypsum.ie
book 6_jan10a:c01 Introduction v3.qxd 15/04/2010 19:43 Page 301
E enquiries@gyproc.ie
GypFloor
SILENT
F 00353 1 623 7054
PERFORMANCE
Please refer to section 6.1 - Introduction - for general considerations.
Table 2 - Dimensions and performance1
Existing basic floor and ceiling
1
Existing floor comprising 195mm x
45mm timber joists at 450mm centres
Sound insulating floor system
T 00353 1 629 8400
with 21mm softwood floor boarding.
Floor boarding lifted and replaced. Existing ceiling removed
UPGRADING2
Floor boarding lifted and replaced. Existing ceiling retained
2
3
GypFloor
4
GypFloor
SILENT
SILENT
Comprising of 21mm softwood
Comprising of 21mm softwood floor
floor boarding with Gyproc
boarding with Gyproc Plank on
Plank on Gypframe SIF Floor
Gypframe SIF Floor Channels.
Channels. 100mm Isover
100mm Isover Modular Roll
Modular Roll in the cavity.
in the cavity. GypLyner ceiling
Resilient bars at 450mm
framework to joists (old nails may be
centres. Ceiling boards as
left in position on underside of
below.
joists). Ceiling boards as below
5
GypFloor
GypFloor
SILENT
SILENT
Comprising of 21mm T&G floor boarding
Comprising of 21mm floor
(or 20mm square edge boarding topped
boarding with Gyproc Plank
with 3mm hardboard) with Gyproc Plank
on Gypframe SIF Floor
on Gypframe SIF Floor Channels. Cavity
bridged between joists2 by 12.5mm
Channels. 100mm Isover
Modular Roll in the cavity.
Glasroc F MultiBoard resting on 100mm x
Ceiling boards as below.
12.5mm Glasroc F MultiBoard strips screwfixed to each joist flush with bottom edge
at 300mm centres. 100mm Isover Modular
Roll in the cavity. Ceiling boards as below.
Detail
Ceiling boards
Fire
Laboratory sound insulation
(100 - 3150Hz)
resistance4
Airborne
Impact
Lnw dB
mins
Rw dB
Performance
substantiation
report
1
Existing layer of 12.5mm Gyproc plasterboard
30 (modified)
36
82
C014036
1
Simulated lath and plaster ceiling (one layer of Gyproc Plank
and one layer of 12.5mm Gyproc plasterboard)3
30 (modified)
40
76
C014037
5
Simulated lath and plaster ceiling (one layer of Gyproc Plank
and one layer of 12.5mm Gyproc plasterboard)3
30
54
63
C204004
5
Existing 12.5mm plasterboard ceiling overboarded with one
layer of 12.5mm Gyproc SoundBloc
30
54
63
C204005
2
Two layers 15mm Gyproc SoundBloc
60
61
56
C204006
2
Inner layer of Gyproc Plank, outer layer of 12.5mm Gyproc SoundBloc
60
63
55
C204001
3
Inner layer of Gyproc Plank, outer layer of 12.5mm Gyproc SoundBloc
60
63
55
C154008
4
Simulated lath and plaster ceiling (one layer of Gyproc Plank
and one layer of 12.5mm Gyproc plasterboard)3
60
54
63
G104032
5
Existing 12.5mm plasterboard ceiling overboarded with one
layer of 15mm Gyproc FireLine
60
54
63
C204007
2
Two layers of 15mm Gyproc FireLine
90
60
57
C204002
1 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.
2 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 2.2
for full details.
6.4
301
book 6_jan10a:c01 Introduction v3.qxd 15/04/2010 19:43 Page 302
SILENT
GypFloor
Sound insulating floor system
www.gyproc.ie
Environmental
GypFloor SILENT 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 2.1 .
Fire resistance
The fire resistances given in Table 2 are for imperforate
ceilings tested to BS 476: Part 8: 1972, or
BS 476: Part 21: 1987, or assessments based on these tests.
Sound insulation
The airborne and impact sound ratings given in Table 2 are
for imperforate ceilings and have been tested in
accordance with BS EN ISO 140-3: 1995, and rated in
accordance with BS EN ISO 717-1: 1997.
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 GypFloor SILENT 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 6.1 - Introduction - for general
considerations.
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 RB1 Resilient Bar and a layer of Gyproc Plank
plus 12.5mm SoundBloc are applied. When two layers of
15mm 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.
Structural1
The system is primarily intended for timber floors with an
intensity of distributed load of up to 5.0kN/m2, 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 1.5 - Finishing Coat Plasters, section
2.2 - Jointing and section 2.5 - Decorative effects.
Estimating
The estimated construction time is 0.5m2 / hour ready
for finishing.
1 Gypsum Industries acknowledges the help of TJM Europe in
preparing this statement.
6.4
302
book 6_jan10a:c01 Introduction v3.qxd 15/04/2010 19:43 Page 303
E enquiries@gyproc.ie
GypFloor
SILENT
F 00353 1 623 7054
CONSTRUCTION DETAILS
Fig 1 - Cut-away floor plan (chipboard flooring)
Sound insulating floor system
T 00353 1 629 8400
Fig 2 - Cut-away ceiling plan (12.5mm x 1200mm x 2700mm Gyproc SoundBloc over Gyproc Plank fixed to
Gypframe RB1 Resilient Bars)
450mm
6.4
303
book 6_jan10a:c01 Introduction v3.qxd 15/04/2010 19:44 Page 304
SILENT
GypFloor
Sound insulating floor system
www.gyproc.ie
6.4
304
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
book 6_jan10a:c01 Introduction v3.qxd 15/04/2010 19:44 Page 305
SILENT
E enquiries@gyproc.ie
GypFloor
F 00353 1 623 7054
Sound insulating floor system
T 00353 1 629 8400
6.4
305