Verified by manufacturer 1 month ago
With deflection head arrangement
CCPI System
Certificate type
EPD
Certificate type
Twin Frame: EI120 | 65dB | Severe Duty
Twin frame plasterboard partition system typically used to divide habitable dwellings.
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.
Material | Gypsum Metal Glass mineral wool |
Shape | Rectangle Other Square |
Width | Bespoke |
Height | Bespoke |
Uniclass | |
CAWS | K10/30 Metal stud K10/125 Metal stud partition system |
Framing | Twin (double) Knauf 70 'C' (0.55) at 600 mm centres to suit maximum height. |
Insulation | 2 x 25 mm Knauf Insulation Acoustic Roll (insulation installed between each stud frame). |
Linings | 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. |
Joint treatment | Horizontal joint: Knauf Flat Fixing Plate (to be applied behind outer layer plasterboard). |
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. |
Execution | Consult manufacturer's literature at |
Deflection head | For deflection head allowance of up to -25 mm or ±12.5 mm, use 2 x 19 mm Knauf Coreboard fillets. Manufacturer guidanceThe fire resistance performance of the system is based on tested solutions using deflection head construction. |
Fire resistance | EI 120 tested in accordance with BS EN 1364-1. |
Sound insulation | 65 dB (Rw) when tested to BS EN 10140-2. |
Duty rating (to BS 5234-2) | Severe Duty in accordance with BS 5234-2, clause 1.6.2 & 1.6.3 of Annex B & C. |
System code | EN-IC-70-055-6-2-15-SSP-2x25(229/120). Guidance for specification option: The maximum height stated (see Partition height) is for the fire resistance of the system to meet project requirements where EN compliance is required. The stated maximum height figure is the lower value between the cold state height, calculated structurally to a limiting deflection of L/240 @ 200 Pa and the fire state height, as outlined in accordance with EN 1364-1. BS-IC-70-055-6-2-15-SSP-2x25(229/120). Guidance for specification option: The maximum height stated (see Partition height) is for the fire resistance of the system to meet project requirements where BS compliance (BS 476-22), is required and is accepted by the client, designers and building control. The stated maximum height figure is based on the maximum cold state height, calculated structurally to a limiting deflection of L/240 @ 200 Pa. |
Partition height | Manufacturer guidanceInsert requirements, maximum 3000 mm. See System code for further details. |
Partition thickness | 229 mm. Manufacturer guidanceExcluding finishes. |
Country of material origin | Spain Manufacturer guidanceApplies to our natural gypsum only which is the main component of plasterboard. Other components are from other countries. Please contact Knauf for more details. |
Country of product manufacture | United Kingdom Manufacturer guidanceUK applies to the majority of manufacture but a small percentage of finished items may be imported. Please contact Knauf for more details. |
Material | Gypsum Metal Glass mineral wool |
Embodied carbonA1-A3 (production stage) as defined in BS EN 15804 | Manufacturer guidanceIndividual product EPDs for plasterboard and metal components available at: https://www.knauf.co.uk/our-services/resources/environmental-product-declarations-1 |
Recyclability | Gypsum and metal components can be recycled, according to local waste disposal regulations, when segregated |
Recycled contentAs defined in clause 7.8 of BS EN ISO 14021 | 11.9 % Manufacturer guidance(2023 average by mass for all UK produced plasterboards, recycled gypsum & paper) |
Knauf BS Compliance Systems
Knauf Core Board Data Sheet
Knauf C Stud Data Sheet
Knauf DF U Channel Data Sheet
Knauf EN Compliance Systems
Knauf Fill and Finish Light Data Sheet
Knauf Fire Rated Deflection Heads Document
Knauf Flat Fixing Plate Data Sheet
Knauf Insulation Acoustic Roll Data Sheet
Knauf Intumescent and Acoustic Mastic Data Sheet
Knauf Paper Joint Tape Data Sheet
Knauf Performance Plus Screws Data Sheet
Knauf Soundshield Plus Data Sheet
Knauf U Channel Data Sheet
The 100% Knauf System Performance Warranty
Knauf Specification Disclaimer
Knauf 'I' Stud Lining (fire resistance system): ISL-I-70-070-6-2x15-FP-50
Knauf 'I' Stud Lining (fire resistance system): ISL-I-92-090-6-2x15-FP-50
Knauf 'I' Stud Lining (non-fire resistance system): ISL-I-50-055-3-2x15-SSP-50
Knauf 'I' Stud Lining (non-fire resistance system): ISL-I-50-055-4-1-12.5-WB-0
Knauf 'I' Stud Lining (non-fire resistance system): ISL-I-50-055-6-1-12.5-MP-0
Knauf 'I' Stud Lining (non-fire resistance system): ISL-I-50-055-6-1x12.5-WB-0
Knauf 'I' Stud Lining (non-fire resistance system): ISL-I-50-055-6-1x15-SSP-0
Knauf 'I' Stud Lining (non-fire resistance system): ISL-I-50-055-6-2-12.5-WB-25
Knauf 'I' Stud Lining (non-fire resistance system): ISL-I-50-055-6-2-15-SSP-25
Knauf 'I' Stud Lining (non-fire resistance system): ISL-I-50-055-6-2-15-SSP-50