Siniat Weather Defence Systems
Application

For superior weather protection, the system is a faster way to a weather tight building compared to traditional sheathing board products.

Description

An external sheathing board, faced with water repellent material for superior weather protection. Strong, highly moisture resistant and A1 non-combustible. The system is a faster way to a weather tight building compared to traditional sheathing board products. Complies with BS EN 15283 Type GM-H1, GM-I and GM-F.

Features and benefits:

  • Dimensionally stable, reliable airtightness.
  • Quick and easy to cut and install saving time and reducing installed cost.
  • Water, weather and mould resistant, can now be left installed and exposed for up to 12 months on site before you need to complete the final cladding.
  • No need for cutting area, power tools or dust extractor.
  • Can eliminate the need for breathable membrane saving time and reducing installed cost.
  • Double BBA certified.
  • Fully A1 non-combustible, compliant for structures above 18 m.

Application:

For superior weather protection, the system is a faster way to a weather tight building compared to traditional sheathing board products.

General information

Features

Dimensionally stable, reliable airtightness, quick and easy to cut and install saving time and reducing installed cost, water, weather and mould resistant

Finish

Should be sealed with GTEC Fire Rated Silicone Sealant or Weather Defence Joint Tape. Non-itch surface

Material

Aerated calcium sulfate di-hydrate with liners made from non-woven tissue with fillers and fibres enclosed inside gypsum core. Core and papers bonded with starch. The board contains a water-resistant additive and a biocide to inhibit mould growth

Shape

Square

Size

1200 x 2400 mm (w x l), 12.5 mm thickness

Uniclass 2015

Ss_25_25_95_28 External wall sheathing systemsPrimary

CAWS

K11/485 Wall sheathing

Specification data - External wall sheathing systems

Product Reference

Siniat Weather Defence Systems

Additional supports

-

General

Suitable framing: Steel or Timber. All mechanically fixed cladding/insulation systems must be fixed back to framework or may be fixed with appropriate fixing, e.g. stainless steel SnapToggle by Toggler

Size

Steel: 100 x 35 x 1.2 mm (minimum) or timber: 140 x 38 mm (minimum)

Sheathing material

One 12.5 mm-thick Weather Defence Board

Two 12.5 mm-thick Weather Defence Boards

Rigid board insulation

50 mm-thick, 45 kg/m³ density rock mineral wool (supplied by others)

System accessories

None

Resilient Bar

Internal board(s)

One 12.5 mm-thick GTEC Aqua Board

One 12.5 mm-thick GTEC Fire Boards

One 12.5 mm-thick GTEC LaDura Boards

One 12.5 mm-thick GTEC Megadeco Boards

One 15 mm-thick GTEC Aqua Boards

One 15 mm-thick GTEC Fire Boards

One 15 mm-thick GTEC LaDura Boards

One 15 mm-thick GTEC Megadeco Boards

Two 12.5 mm-thick GTEC Aqua Boards

Two 12.5 mm-thick GTEC Fire Boards

Two 12.5 mm-thick GTEC LaDura Boards

Two 12.5 mm-thick GTEC Megadeco Boards

Two 15 mm-thick GTEC Aqua Boards

Two 15 mm-thick GTEC Fire Boards

Two 15 mm-thick GTEC LaDura Boards

Two 15 mm-thick GTEC Megadeco Boards

Sealing

GTEC Fire Rated Silicone Sealant and Weather Defence Joint Tape

Acoustic performance

Dependent on system build-up

Fire performance (to BS 476-22)

Dependent on system build-up

Properties

Nominal weight: 10.8 kg/m², density: 860 kg/m³, thermal resistance (R-value): 0.065 m²K/W, thermal conductivity (K-value): 0.25 W/mk

Standard product features

Colour:

Coloured purple on the front face and white on the back face.

Features:

Dimensionally stable, reliable airtightness, quick and easy to cut and install saving time and reducing installed cost, water, weather and mould resistant.

Finish:

Should be sealed with GTEC Fire Rated Silicone Sealant or Weather Defence Joint Tape. Non-itch surface.

Material:

Aerated calcium sulfate di-hydrate with liners made from non-woven tissue with fillers and fibres enclosed inside gypsum core. Core and papers bonded with starch. The board contains a water-resistant additive and a biocide to inhibit mould growth.

Shape:

Square.

Size:

1200 x 2400 mm (w x l), 12.5 mm thickness.

Recycled content:

Refer to the Plasterboard Health and Safety Datasheet available on Siniat's website.

Recyclability:

Refer to the Plasterboard Health and Safety Datasheet available on Siniat's website.

Embodied carbon:

Refer to the Plasterboard Health and Safety Datasheet available on Siniat's website.

Red Listed materials:

Refer to the Plasterboard Health and Safety Datasheet available on Siniat's website.

Environmental information

Embodied carbon

Refer to the Plasterboard Health and Safety Datasheet available on Siniat's website

Recyclability

Refer to the Plasterboard Health and Safety Datasheet available on Siniat's website

Recycled content

Refer to the Plasterboard Health and Safety Datasheet available on Siniat's website