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Application

Timber joist ceiling.

Description

Timber joist ceiling based on fermacell® Gypsum-Fibreboard linings. Homogeneous dry lining board made from recycled gypsum, recycled cellulose fibres from post consumer waste paper and recycled water. 


Features and benefits:

  • The board is light grey in colour.
  • Available square edged.
  • Marked on the rear face with the product name and identification.
  • fermacell® fibre gypsum boards offer a wealth of advantages compared to conventional interior dry lining such as plasterboard.
  • High performance building board that when installed offers the speed of dry-wall with the robustness of blockwork saving in space, time and money.

General information

Color

Grey

Manufacturer guidance

Board colour.

Finish

-

Manufacturer guidance

Painted, as required.

Material

Gypsum

Guidance for specification option:

fermacell® Gypsum-Fibreboard consists of a homogeneous mixture of water, gypsum and cellulose fibre compressed at high pressure.

Shape

Rectangle

Length

2400 mm

2700 mm

3000 mm

Width

1200 mm

Height

218 mm

Guidance for specification option:

≥.

221 mm

Guidance for specification option:

≥.

Uniclass

Ss_30_25_10_10 Board suspended ceiling systemsPrimary

CAWS

K40/20 Board-suspended ceiling systems

K40/115 Unit/ modular suspended ceiling system

K40/265 Infill units

K40/135 Board-suspended ceiling system

K40/10 Unit/ modular suspended ceilings

Specification data - Board suspended ceiling systems

System performance

EI 30 fire rating from below.

Suspension grid

170 x 70 mm timber joists at maximum 610 mm centres with 18 mm chipboard structural floor deck.

Suspension grid fasteners

Timber battens 50/30.

Resilient bar.

Guidance for specification option:

At max 400mm centres.

Insulation

Mineral wool insulation.

Barriers in ceiling void

-

Fire barriers

From below.

Linings

-

Inner layers

10 mm fermacell®.

12.5 mm fermacell®.

Fasteners

30 mm fermacell® screws at max 200 mm centres.

Joint treatment

fermacell® Jointstik 1 mm glued joint.

fermacell® Jointfiller 5–7 mm filled joint.

System accessories

-

Manufacturer guidance

Use correct accessories as per manufacturers guidelines.

Execution

-

Manufacturer guidance

Installing boarded ceilings.

System completion

Verification of performance.

Joists

170 x 70 mm.

Guidance for specification option:

@ max. 610 mm c/c.

With 18 mm T&G chipboard structural floor deck.

Manufacturer guidance

Timber joists.

Substructure

Timber battens 50/30.

Resilient bar.

Height

≥ 218 mm.

≥ 221 mm.

Manufacturer guidance

System height.

Board size

2400 x 1200 mm.

2700 x 1200 mm.

3000 x 1200 mm.

Manufacturer guidance

fermacell® fibre gypsum board.

Density

1150+50 kg/m³.

Manufacturer guidance

fermacell® fibre gypsum board.

Water vapour diffusion resistance

13 μ.

Manufacturer guidance

fermacell® fibre gypsum board.

SpecificHeatCapacity

1.1 kJ/kgK.

Manufacturer guidance

fermacell® fibre gypsum board.

Hardness

30 N/mm².

Manufacturer guidance

fermacell® fibre gypsum board.

ThicknessSwelling

< 2%.

Manufacturer guidance

fermacell® fibre gypsum board.

Shrinkage

0.25 mm/m.

Guidance for specification option:

At 30% change in relative humidity (20°C).

Manufacturer guidance

fermacell® fibre gypsum board.

Extension/shrinkage.

MoistureContent

1.3%.

Guidance for specification option:

At 65% relative humidity at 20 °C air temperature.

Manufacturer guidance

fermacell® fibre gypsum board.

pH value

7–8.

Manufacturer guidance

fermacell® fibre gypsum board.

Usage

Type 1 and 2.

Guidance for specification option:

Usage classification to EN 1995-1.

Manufacturer guidance

fermacell® fibre gypsum board.

ThermalExpansionCoefficient

0.0001 %/K.

Manufacturer guidance

fermacell® fibre gypsum board.

ThermalConductivity

0.32 λ.

Manufacturer guidance

fermacell® fibre gypsum board.

Literature

fermacell®  Specification Guide

fermacell® Specification Guide

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