Summary
The Knauf Isolator system is typically used to divide habitable dwellings.
The Knauf Isolator system is typically used to divide habitable dwellings.
Application
Plasterboard partition (Twin Frame) system typically used to divide habitable dwellings.
Plasterboard partition (Twin Frame) system typically used to divide habitable dwellings.
Description
The Knauf Isolator system is typically used to divide habitable dwellings.
The twin stud build up, combined with Knauf’s high performance plasterboards, maximises acoustic performance in order to comply with building regulations, technical handbooks and guidances for sound insulation.
Testing Methodology: BS EN 1363-1 AND BS 476-20
Knauf interior drywall partition systems* that achieve a fire resistance performance are tested in accordance with BS EN 1363-1 and BS EN 1364-1. These are the up to date and most rigorous test methodology standards to follow.
Determining the maximum height of a drywall partition as per the BS EN 1363-1 fire test methodology, is typically restricted by the 3 metre height of the test furnace.
To understand the true maximum height of the system whilst under fire test conditions (‘Fire State Height’), there are three options. Increases can be determined by utilising greater test furnace heights, via Extended Field of Application (as outlined in BS EN 15254-3 - it is important to note this standard applies to single metal frame symmetrical systems only), or via BS EN 1364-1.
The BS 476-20 standard is also restricted by the 3 metre height of the test furnace. However, under this BS standard, increasing the maximum heights of a system can be based on the ‘Cold State Height’. The cold state height is calculated using structural engineering methods to L/240 @ 200Pascals. (L = Height of wall). Regulatory Requirements
Specific to Approved Document B (England) there is a requirement to use European classifications and fire resistance test methodologies in accordance with BS EN 1363-1 and BS EN 1364-1, which means that the fire state height must be considered. However, Approved Document B (England) currently allows the usage of the BS 476 series, though it should be noted that, following consultation, the full BS 476 series will be removed in 2029. For other nationals, please consult relevant approved documents, technical guidance, and handbooks.
Knauf Approach & Recommendations:
Knauf advise and promote that EN compliance should be followed. That is to say Knauf advise utilising an BS EN 1364-1 fire resistance test and extend the maximum height of a drywall partition system via either BS EN 15254-3, BS EN 1364-1 or via a fire resistance test within a test rig greater than 3m in height.
Projects that wish to use the BS 476 series must gain agreement between the Client, Accountable Persons, Duty Holders, and Local Building Control that the cold state height is an acceptable methodology. For further information on Knauf system types that are applicable to support projects focusing on BS compliance, refer to Knauf Systems Performance Tables (BS compliance).
The Knauf Isolator system is typically used to divide habitable dwellings.
The twin stud build up, combined with Knauf’s high performance plasterboards, maximises acoustic performance in order to comply with building regulations, technical handbooks and guidances for sound insulation.
Testing Methodology: BS EN 1363-1 AND BS 476-20
Knauf interior drywall partition systems* that achieve a fire resistance performance are tested in accordance with BS EN 1363-1 and BS EN 1364-1. These are the up to date and most rigorous test methodology standards to follow.
Determining the maximum height of a drywall partition as per the BS EN 1363-1 fire test methodology, is typically restricted by the 3 metre height of the test furnace.
To understand the true maximum height of the system whilst under fire test conditions (‘Fire State Height’), there are three options. Increases can be determined by utilising greater test furnace heights, via Extended Field of Application (as outlined in BS EN 15254-3 - it is important to note this standard applies to single metal frame symmetrical systems only), or via BS EN 1364-1.
The BS 476-20 standard is also restricted by the 3 metre height of the test furnace. However, under this BS standard, increasing the maximum heights of a system can be based on the ‘Cold State Height’. The cold state height is calculated using structural engineering methods to L/240 @ 200Pascals. (L = Height of wall). Regulatory Requirements
Specific to Approved Document B (England) there is a requirement to use European classifications and fire resistance test methodologies in accordance with BS EN 1363-1 and BS EN 1364-1, which means that the fire state height must be considered. However, Approved Document B (England) currently allows the usage of the BS 476 series, though it should be noted that, following consultation, the full BS 476 series will be removed in 2029. For other nationals, please consult relevant approved documents, technical guidance, and handbooks.
Knauf Approach & Recommendations:
Knauf advise and promote that EN compliance should be followed. That is to say Knauf advise utilising an BS EN 1364-1 fire resistance test and extend the maximum height of a drywall partition system via either BS EN 15254-3, BS EN 1364-1 or via a fire resistance test within a test rig greater than 3m in height.
Projects that wish to use the BS 476 series must gain agreement between the Client, Accountable Persons, Duty Holders, and Local Building Control that the cold state height is an acceptable methodology. For further information on Knauf system types that are applicable to support projects focusing on BS compliance, refer to Knauf Systems Performance Tables (BS compliance).
Product certifications
Digital objects
Material
Gypsum, Metal, Glass mineral wool
Gypsum, Metal, Glass mineral wool
Shape
Rectangle, Other, Square
Rectangle, Other, Square
Width
Bespoke
Bespoke
Height
Bespoke
Bespoke
SKU Code
ICB-70-055-6-2-15-SSP-2x25(229/90)
ICB-70-055-6-2-15-SSP-2x25(229/90)
Specification
System Performance
Sound insulation, Rw (minimum) to BS EN ISO 10140-2 or BS EN ISO 140-3
65 Rw (dB).
65 Rw (dB).
Sound insulation, Rw + Ctr (minimum) to BS EN ISO 10140-2 or BS EN ISO 140-3
60 Rw+Ctr (dB).
60 Rw+Ctr (dB).
Fire resistance to BS EN 1364-1
EI 90.
EI 90.
Maximum height - cold state
7000 mm.
7000 mm.
Thickness
229 mm.
229 mm.
Classification data
Framing
Twin (double) Knauf 70 'C' (0.55) at 600 mm centres to suit maximum height.
Head channel: Knauf 72 Deep Flange 'U' Channel (0.60) (50 mm deep flange).
Floor channel: For system heights <5 m use Knauf 72 ‘U’ Channel (0.55). For system heights ≥5 m use Knauf 72 Deep Flange ‘U’ Channel (0.70) (70 mm deep flange).
Bracing: Knauf Flat Plate at 1500 mm vertical centres.
Twin (double) Knauf 70 'C' (0.55) at 600 mm centres to suit maximum height.
Head channel: Knauf 72 Deep Flange 'U' Channel (0.60) (50 mm deep flange).
Floor channel: For system heights <5 m use Knauf 72 ‘U’ Channel (0.55). For system heights ≥5 m use Knauf 72 Deep Flange ‘U’ Channel (0.70) (70 mm deep flange).
Bracing: Knauf Flat Plate at 1500 mm vertical centres.
Insulation
2 x 25 mm Knauf Insulation Acoustic Roll.
2 x 25 mm Knauf Insulation Acoustic Roll.
Linings
2 x 15 mm Knauf Soundshield Plus to the outer side of double studs.
2 x 15 mm Knauf Soundshield Plus to the outer side of double studs.
Fasteners
Inner layer (each side): 25 mm Knauf Performance Plus screws.
Outer layer (each side): 45 mm Knauf Performance Plus screws.
Inner layer (each side): 25 mm Knauf Performance Plus screws.
Outer layer (each side): 45 mm Knauf Performance Plus screws.
Joint treatment
Horizontal joint: Knauf Flat Fixing Plate.
Horizontal joint: Knauf Flat Fixing Plate.
Finish
System must be taped and jointed using Knauf Joint Filler (Premium) or Knauf Joint Cement Premium and Knauf Joint Tape (Paper). Or alternative Knauf jointing compounds manufactured to EN 13963.
Knauf Wallboard Primer applied once taping and jointing completed.
Prior to where paint decoration is required. For preparation for decoration of where gypsum plaster skim is required, the outer layer of plasterboard joints is required to be taped and filled, using Knauf Joint Filler (Premium) and Knauf Joint Tape (Paper) meeting quality level 1 in accordance with Eurogypsum - Drywall Jointing & Finishing - Surface quality level classification.
For application where gypsum skim finish is required, the Knauf system is to be taped and filled using Knauf jointing compounds.
System must be taped and jointed using Knauf Joint Filler (Premium) or Knauf Joint Cement Premium and Knauf Joint Tape (Paper). Or alternative Knauf jointing compounds manufactured to EN 13963.
Knauf Wallboard Primer applied once taping and jointing completed.
Prior to where paint decoration is required. For preparation for decoration of where gypsum plaster skim is required, the outer layer of plasterboard joints is required to be taped and filled, using Knauf Joint Filler (Premium) and Knauf Joint Tape (Paper) meeting quality level 1 in accordance with Eurogypsum - Drywall Jointing & Finishing - Surface quality level classification.
For application where gypsum skim finish is required, the Knauf system is to be taped and filled using Knauf jointing compounds.
Execution
Consult manufacturer's literature at
https://www.knauf.co.uk/our-services/resources
Consult manufacturer's literature at
https://www.knauf.co.uk/our-services/resources
Additional properties
Deflection head
For deflection head allowance of up to -25 mm or ±12.5 mm, use 2 x 19 mm Knauf Coreboard fillets.
N/A.
Duty rating (to BS 5234-2)
Manufacturer's standard.
Manufacturer's standard.
System code
BS-ICB-70-055-6-2-15-SSP-2x25(229/90).
BS-ICB-70-055-6-2-15-SSP-2x25(229/90).
Sustainability data
Country of material origin
Spain
Spain
Country of product manufacture
United Kingdom
United Kingdom
Material
Gypsum, Metal, Glass mineral wool
Gypsum, Metal, Glass mineral wool
Recyclability
Individual product EPDs for plasterboard and metal components available at: https://www.knauf.co.uk/our-services/resources/environmental-product-declarations-1
Individual product EPDs for plasterboard and metal components available at: https://www.knauf.co.uk/our-services/resources/environmental-product-declarations-1
Recycled content
12.64 %
12.64 %