Siniat Weather Defence External Sheathing Board 12.5mm x 1200mm x 2400mm is a strong, moisture resistant A1 non-combustible exterior sheathing board faced with water repellent material that is compliant for structures above 18m in height.

Weather Defence™ is a revolutionary facade external sheathing board that is fully compliant with BS EN 15283 Type GM-H1, GM-I and GM-F giving faster way to a weather tight building compared to traditional sheathing board products.

Siniat GTEC External Sheathing Boards are quick and easy to cut and install saving time and reducing installed cost with no need for cutting area, power tools or dust extractor.

12.5mm Siniat Weather Defence is water, weather and mould resistant therefore can be left installed and exposed for up to 12 months on site before the completion of the final cladding.

Due to its superior weather protection properties thermal insulation can be installed within the frame, mechanically fixed or adhesively bonded to the board.

Weather Defence Board is a BBA certified product suitable for use as an exterior and wall facade panel system in timber-frame and steel-frame buildings that allows construction timetables to be drastically reduced.

Siniat Weather Defence™ gypsum core technology ensures excellent fire performance and high sound insulation, inside-to-out and outside-to-in, to deliver safe, comfortable buildings in compliance with building regulations.

12.5mm GTEC Weather Defence is compatible with numerous cladding systems, an ideal substrate for insulation and in rainscreen or masonry cladding where it serves as a weather tight barrier.

Siniat Weather Defence™ core is made from aerated calcium sulphate di-hydrate with polymer and glass fibre liners with moisture and fire resistant fillers and fibres, coloured purple on the front and white on the reverse face.

Specification:

Thickness: 12.5mm

Width: 1200mm

Length: 2400mm

Weight: 31.11kg

R-Value: 0.05m2K/W

Board Coverage: 2.88m2

Profile: Square Edge (S.E)

Thermal Conductivity: 0.25 W/mK 

Fire Classification: A1(Non-combustible)

Certification: Class ‘0’ to UK Building Regulations

Material: Gypsum core technology

BBA Certified: Yes, no.10/4725

Colour: Purple on the front and white on the reverse face

Siniat GTEC Weather Defence™ Features:

 · Class ‘0’ to UK Building Regulations.

 · A1 Non-combustible material (Fire Rated).

 · Dimensionally stable, reliable airtightness.

 · Quick and easy to cut and install.

 · Saving time and reducing installed cost.

 · Revolutionary purple external sheathing board.

 · Fastest way to a weather tight building.

 · Superior water, weather and mould resistant properties.

 · Fully compliant with BS EN 15283 Type GM-H1, GM-I and GM-F.

 · Superior weather protection for Facade Systems.

 · No need for a cutting area, power tools or dust extractor.

 · Suitable for steel or timber frame construction with rainscreen.

 · Suitable for insulated render, brick or block facade systems.

 · Can eliminate the need for a breathable membrane.

 · Double BBA certified high performance product.

 · Compliant for structures above 18m in height.

 · Provides up to 120 minutes fire resistance.

 · Outstanding airtightness and air permeability.

 · Hydrophobic gypsum core for superior sound resistance.

 · Can be left installed and exposed for up to 12 months on site before completion of the final cladding.

*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet