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webertherm XP263

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  • BBA Agrément Certificate

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Saint-Gobain Weber

Mechanically fixed external wall insulation (EWI) system, using expanded polystyrene (EPS) insulation and a specially designed mineral one-coat render with a roughcast finish.

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Application

Suitable for use in refurbishment and new build projects on buildings with a floor not exceeding 18 m above ground level (as standard) for England and Wales, and a reduced height of 11 m for Scotland. For installation onto new, sound brick/ blocks, or existing rendered/ un-rendered sound masonry.

Description

Mechanically fixed external wall insulation (EWI) system, using expanded polystyrene (EPS) insulation and a specially designed mineral one-coat render with a roughcast finish.

Features and benefits:

  • Chlorofluorocarbon (CFC)/ hydrochlorofluorocarbon (HCFC) free.
  • Provides weather protection.
  • Low maintenance and durable.
  • A wide range of finish coat colours are available.
  • Can be used for decorating and re-modelling existing facades.
  • Helps to increase energy efficiency.
  • One-coat application, significantly reducing the ‘programme of works’ and all associated costs.
  • Creates a 'warm wall' construction.
  • High strength mechanical fixings allow for installation to friable surfaces.
  • BBA approved.
  • When installed 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.

Applications:

Suitable for use in refurbishment and new build projects on buildings with a floor not exceeding 18 m above ground level (as standard) for England and Wales, and a reduced height of 11 m for Scotland. For installation onto new, sound brick/ blocks, or existing rendered/ un-rendered sound masonry.

System components:

  • Weber fixings as specified for the substrate.
  • webertherm EPS insulation (of specified thickness).
  • weber standard meshcloth.
  • webertherm M1.

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:

  • The system should meet the building regulations requirements in compliance with BR 135. This includes achieving fire compartmentation of the structure using non-combustible fire barriers (webertherm MFL), installed vertically or horizontally at vulnerable areas such as window openings, doorways, penetrations and each floor level above the first floor level. The BR 135 recommends for each barrier to consist of a non-combustible material 100 mm minimum in height, which is fully bonded with weberend LAC and mechanically fixed using appropriate fire fixings through the meshcloth coat at maximum 400 mm centres. Additionally, install appropriate fire fixings (stainless steel as per BRE 135) at a rate of 1/m² minimum across the whole area.
  • 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
Specification data - Adhesive-fixed external wall insulation systems
Product Reference

webertherm XP263

Building height

Up to 18 m (maximum) for England and Wales. Up to 11 m (maximum) for Scotland. Insert requirement.

Preparation

Not required

Weber CL150 Fungicidal Masonry Wash

Consult manufacturer for details.

Insulation -
Type

webertherm EPS Expanded Polystyrene

EPS 70 E to BS EN 13163.

Thickness

Dependent on required thermal transmittance (U-value). Consult manufacturer and insert requirement.

Fixings

To be confirmed on-site by pull out tests in accordance with BS EN 1991-1-4: 2005

Recycled content

Consult manufacturer for details and insert requirements.

Glass fibre reinforcement

webermesh standard

Balanced, open weave glass fibre meshcloth, coated for alkaline resistance. 1 x 50 m roll.

Adhesive

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

Cavity barriers

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

Consult manufacturer for details.

Sealant joints

Low modulus silicone

Consult manufacturer for details.

Render -
Finishing coat -
Type

webertherm M1 – roughcast texture

Colour

Consult manufacturer's colour chart and insert requirements.

Thickness

12 mm (minimum). Consult manufacturer and insert requirements.

Accessories/ Other requirements

Not required

Full system Weber base bead

Aluminium box profile with clip on nosing.

Weber frame seal

Can be used as an alternative at windows to provide a mastic free seal with improved aesthetics/ maintenance.

Weber pre-coated, pressed aluminium under cill trims

1.2 mm thick (nominal), size to suit EWI System, if required.

Weber pre-coated, pressed aluminium verge trims

1.2 mm thick (nominal), size to suit EWI System, if required.

Weber PVC corner, stop, drip and movement beads

As required.

Standard product features

Fire classification (to BS EN 13501-1):

Euro Class B-s1, d0.

Impact resistance (to ETAG 004):

Category i.

Coverage:

  • webertherm EPS: 0.72 m² per board.
  • webermesh standard: 45 m² per roll.

Product Options

Preparation:

- Weber CL150 Fungicidal Masonry Wash:

For existing substrates, or where required on new substrates, drench apply CL150 wash and leave for 48 hours, then brush down to remove all moss/ growth.

Insulation:

  • Plain expanded polystyrene, SD/FRA grade.
  • Size: 1200 x 600 mm.
  • Nominal density: 14–16 kg/m³.
  • Thermal conductivity: 0.032 W/m·K.
  • Fire classification: Euro Class E; when part of webertherm XM: Building Regulations National Class 0 when tested to BS 476 Part 6 and 7.
  • Maximum water vapour permeability: 0.018–0.036 mg (P.a.h.m).
  • Fixings: Five required per insulation board.

Render:

- Finishing coat:

Factory batched, through-coloured mineral render for a one coat application, incorporating webermesh glassfibre meshcloth. Suitable for scrape texture, dry dash or spray roughcast finishing, coloured and polymer modified, comprising limestone sands, lime, powdered polymer, pigment, cement and graded aggregates.

Literature
Third party certifications
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