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webertherm XM thickcoat silicone system (MFD)

Verified by manufacturer 4 months ago

Saint-Gobain Weber

Render protected, mechanically fixed external wall insulation (EWI) system based on non-combustible mineral fibre (MF) insulant, a weberend PTC second coat and a webersil TF top coat.

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Application

Suitable for use in refurbishment and new build projects. Can be used above 18 m in England and Wales, and above 11 m for Scotland to comply with appropriate Building Regulations.

Description

[Formerly known as webertherm XM MW FM124]


Render protected, mechanically fixed external wall insulation (EWI) system based on non-combustible mineral fibre (MF) insulant with meshcloth reinforced basecoat, a top coat and a textured synthetic finish.


Features and benefits:

  • Chlorofluorocarbon (CFC)/ hydrochlorofluorocarbon (HCFC) free.
  • Good impact resistance.
  • Provides weather protection.
  • Lightweight.
  • A wide range of finish coat colours are available.
  • Can be used for decorating and re-modelling existing facades.
  • BBA approved.
  • When installed to a masonry substrate and maintained in accordance with the manufacturer's recommendations, the system will remain effective for at least 30 years. The durability can be extended to 60 years by using specific fixings, accessories, additional adhesive and by following a planned inspection and maintenance schedule. Consult manufacturer for details.


System components:


  • Weber fixings as specified for the substrate.
  • webertherm MFD insulation (of specified thickness).
  • weberend LAC (first layer, 3 mm).
  • weber standard meshcloth.
  • weberend LAC (second layer, 3 mm).
  • weberend PTC (6 mm thick).
  • weber PR310 primer.
  • webersil TF.

The installation must be capable of resisting all dead loads and design live loads, including impact and wind loads, and accommodate all thermal movements without damage.

System installation is to be strictly in accordance with Saint-Gobain Weber specification. Please note that any other manufacturer's products used within the system will invalidate the guarantee, and the performance cannot be supported.

Remedial work must be completed prior to the installation of Weber EWI Systems.


Recommendations:


  • It is recommended for the contractors/ clients design team to ensure the system installed meets the building regulations requirements along with undertaking design liability for the building in its entirety including compliance with supplementary guidance such as BR 135. Weber external wall insulation systems incorporating mineral fibre insulation with a suitable fire tested finish (contact Weber for further details) achieve a reaction to fire classification of A2, s1, d0. Systems achieving this classification or better are considered suitable for use on, or at any distance from, a boundary without height restriction. In addition to the main wall fixings, appropriate fire fixings (stainless steel as per BRE 135) should also be installed at a rate of 1/m² minimum across the whole area receiving the system.
  • Fixings must penetrate the structure in accordance with the fixing design to provide the appropriate pull out resistance. A survey of the building must be completed by an engineer to ensure the additional load does not have a detrimental effect on the building and the fixings are able to sufficiently penetrate the structure, to adequately support the Weber system. Weber will undertake fixing pull out tests and verify the adequacy of the fixing design based on a wind loading assessment carried out in accordance with BS EN 1991-1-4: 2005.

General information

Color

-

Manufacturer guidance

160 Standard colours.

Finish

Silicone

Guidance for specification option:

webersil TF.

Textured

Material

Mineral fibre

Uniclass

Ss_25_45_72_28 External wall insulation systemsPrimary

CAWS

M21/20 External wall insulation system . . . . . .

M21/210 External wall insulation system

Product range

External wall insulation systems / Reaction to fire: A2-s1,d0
External wall insulation systems / For masonry

Specification data - External wall insulation systems

Preparation

Not required.

Weber CL150 Fungicidal Masonry Wash.

Guidance for specification option:

Consult manufacturer for details.

Insulation

-

Material

MFD.

Guidance for specification option:

50-200 mm.

Adhesive

Guidance for specification option:

Required to comply with SWIGA guarantee requirements on all buildings greater than four floors in height above ground level. Consult manufacturer and insert requirements.

Additional mechanical fixings

-

Manufacturer guidance

Fixings are dependent on wind load and pull out strength, please contact Weber for advice.

Fire barriers and stops

-

Material

MFD.

Fixings

Stainless steel (at 400 mm centres).

Movement joints

-

Form with

-

Manufacturer guidance

Please contact Weber for bespoke details.

Render carrier or reinforcement

-

Material

Balanced, open weave, alkaline resistant glass fibre meshcloth.

Mesh size

3.5 x 3.5 mm.

Render

-

Application

Can be hand applied or sprayed.

Material

weberend LAC and weberend PTC.

Decorative finish

webersil TF.

Colour

-

Manufacturer guidance

Available in 160 standard colours.

Cavity barriers

Type, thickness, density and compressive strength to be determined by the design team.

Guidance for specification option:

Consult manufacturer for details.

Sealant joints

Low modulus silicone.

Guidance for specification option:

Consult manufacturer for details.

Accessories/ Other requirements

Guidance for specification option:

See 'Options' and insert requirements.

Fire performance

A2,s1,d0 when classified in accordance with BS EN 13501-1.

Sustainability data

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

Literature

External Wall Insulation for refurbishment

External Wall Insulation for refurbishment

Weber synthetic colour guide

Weber synthetic colour guide

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