This site uses cookies to store information on your computer. Learn more about these cookies, and how to opt out of them. Find out more

NBS Source
Klasse External Sheathing Board (G-board)

Klasse External Sheathing Board (G-board)

Verified by manufacturer 1 month ago

Klasse Group Ltd Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

High-performance external gypsum-based sheathing board made with special glass fibre and is durable against fire, moisture, mould and impact.

Jump to:
+44 (0)1432 842 030 www.klassegroup.co.uk

Application

Suitable for use as an external gypsum-based sheathing board.


SAFE & EASY TO USE

  • Easy to handle, 30% lighter than traditional cement boards.
  • Can be cut with a knife - no power tools are required for cutting and minimal dust is produced.
  • Can easily be curved
  • Can eliminate the need for a breather membrane helping to lessen project costs
  • Water-resistant with a 12 months exposure guarantee
  • 12-Year Warranty



VERSATILE - CAN BE USED IN ANY FRAMING SYSTEM

Klasse's external sheathing is designed to be installed on:

  • Light steel infill and oversail systems on concrete and steel frame buildings
  • Modular buildings
  • Light gauge steel frame
  • Timber frame buildings​



Description

Klasse G-board is a high-performance external gypsum-based sheathing board made with special glass fibre and is durable against fire, moisture, mould and impact. Lightweight and easy to carry, it facilitates fast, practical, and economical construction solutions.


Calcium sulphate dihydrate is encased within a glass fibre mat. Additionally nominal amounts of additives such as; starch, foaming agent, dispersants, wax and glass fibre.


Klasse external sheathing board is coloured green on the front face and green on the back face.


To achieve weather tightness, Klasse external sheathing board should be sealed with FireFend™ silicone sealant or joint tape.


Features and benefits:

  • Impact Permission Diameter: ≤ 15 mm.
  • Number of boards per pallet: 52.
  • BBA Certified


ROBUST & DURABLE

  • High density to mitigate fire, wind and installation damage and ensure you deliver a safe, on-time project
  • Boasts impressive pull-through strength and high-impact resistance
  • Extensively tested in a through wall system to achieve 90mins fire protection (BS EN 1364-1)
  • Euroclass A1, is fully non-combustible and suitable for structures over 18m


Test results and interesting points to consider:

  • Acoustic Performance: Acoustically tested according to ISO 10140-2.
  • Thermal Performance: Additional insulation can be installed without detrimental effect on the fire or acoustic performance.
  • G-board has an extremely stable substrate and will only enlarge by fractions of a millimetre when humidity increases. This means the boards can be installed flush. The board is constructed to be vapour open allowing moisture trapped with a wall to escape.
  • As the core is gypsum it locks moisture into the crystal structure which reduces temperatures in the event of a fire.
  • G-board construction will not add fuel when used in a façade capacity. It will reduce the transmission of a fire if other materials combust in the façade.


General information

Color

Green

Finish

Matt

Material

Gypsum

Glass Fibre

Shape

Rectangle

Size

L x W x T.

Length

2400 mm

Width

1200 mm

Height

12.5 mm

WarrantyDescription

12 year

  • 12 month exposure warranty.
  • 12 year warranty period - will reinstate the board or component that has contributed to the defect to its originally specified performance level.

Uniclass

Pr_25_71_35_29 Fibre-reinforced gypsum boardsPrimary

CAWS

K11/485 Wall sheathing

Specification data - Fibre-reinforced gypsum boards

Standard

To BS EN 15283-1+A1.

Reinforcement

Glass fibre-reinforced.

Fire rating

A1 – s1, d0.

Thickness

12.5 mm.

Edges

Square.

Tapered.

Flexural strength

Perpendicular to liner paper fibres: ≥ 725 N, parallel to liner paper fibres: ≥ 300 N.

Thermal conductivity

0.25 W/mK.

Water absorption

Total Water Absorption: ≤ 5%.


≤ 180 g/m².

Area weight

≤ 12 kg/m².

Core

Moisture-resistant.

Paper facings

Moisture-resistant.

Literature

Klasse Gypsum External Sheathing Board (G-board) Data Sheet

Klasse Gypsum External Sheathing Board (G-board) Data Sheet

Klasse Gypsum External Sheathing Board (G-board) Brochure

Klasse Gypsum External Sheathing Board (G-board) Brochure

Case studies

E18 Going Green! Queen Mary's Gate, South Woodford, London.

E18 Going Green! Queen Mary's Gate, South Woodford, London.

Klasse On Site Of Multi-Million Pound School Expansion, Bournemouth

Klasse On Site Of Multi-Million Pound School Expansion, Bournemouth

Heathside School, Walton-on-Thames

Heathside School, Walton-on-Thames

Third party certifications

BBA Agrément Certificate

BBA Agrément Certificate

Klasse External Sheathing Board - BBA Certificate