About this product
weber.therm XL is a high performance external wall insulation system incorporating expanded metal lath and traditional or polymer modified render.
weber.therm XL systems have BBA approval covering various types of insulation and many render finishes.
Features and Benefits
- Provides efficient thermal insulation for refurbishment and new build projects
- Comprehensive range of colours and textures enable the creation of striking visual effects
- Has a High performance water shedding range of finishes to protect the building fabric
- Particularly suited to high rise applications and for areas where high impact resistance is required
- Eliminates interstitial condensation by creating a 'warm wall' construction
- High strength mechanical fixings allow application to existing 'suspect' or friable surfaces
- Supported by comprehensive technical and architectural services
- BBA approved certificate no. 91/2600 with Irish Building Regulations statement
Technical data
Constraints
The quality of application of these materials depends on suitable operator skills and product familiarity.
Restrictions on weather conditions during application and curing must be respected.
Sound trade practices and printed instructions must be followed.
Good access and appropriate protection must be provided.
Materials
Beads, trims and flashings
Full system and render only beads are available in polyester powder coated galvanised mild steel or grade 304 austenitic stainless steel in 3m and 2.5m lengths.>br>
Trims and flashings such as overcills and copings are available in PPC aluminium in 2.5m lengths or made to order.
Insulation
Rigid insulation boards are supplied from the following range.
Metal Lath
Expanded metal lath is available in the following:
Fixings
A wide range is available to accommodate all insulant thicknesses
and substrate types. Fixings are specified on a project by project
basis and pull-out values are established to ensure the EWI system
is securely fixed back to the substrate.
Undercoat Traditional and polymer-modified undercoats are factory batched cement based mortars.
Topcoats
Coloured topcoats are available for use as a background for dry
dash, a scraped textured finish or smooth float finish for synthetic
textured coatings.
Preparation
Existing rendered substrates
Hammer test and remove all areas of loose 'bossed' render.
Treat surfaces with weber CL150, a biocidal wash to remove any traces of organic growth.
Make good surfaces using weber.rend stipple and weber.rend TUC or weber.rend PUC.
New build masonry or frame structure
Ensure all surfaces are clean, in plane and of adequate thickness to provide appropriate support and stiffness without deflection or edge protrusions.
Application
Fix base and other full system beads as specified.
Fix the insulation, render only beads (if specified) and lath as described in the System Specification Sheet or relevant project documentation.
Mix and apply the appropriate undercoat to specified thickness.
Mix and apply top coat as directed to achieve the desired finish.
Where an additional synthetic finish is required, apply the relevant primer prior to the application of the selected textured coating.
Good practice
Do not apply mineral renders:
- If frost is forecast within 24 hours of use
- In damp/wet conditions
- In temperatures below 5°C or above 30°C
- On elevations in direct sunlight or where the substrate is hot
Technical services
weber Customer Services Department has a team of
experienced advisors available to provide on-site advice both at the
specification stage and during application. Detailed specifications
can be provided for specific projects or more general works.
Site visits and on-site demonstrations can be arranged on request.
Technical support and advice
During the planning stages of a project, advice should be
sought from weber technical staff.
Advise based on technical expertise together with unrivalled
practical experience is freely available and covers:
Design: assistance with the selection of the
appropriate system, including working details
and U-value calculations.
Pre-contract documentation: specifications, typical details
and method statements.
Contract documentation: site packages, available through
the specialist contractor. These include approved details, specification
and site procedures.
Technical helpline
Tel: (01525) 722110
Fax: (01525) 718988
Sales Contact
Sales, England and Wales
Tel: (01525) 722100
Fax: (01525) 718988
Sales, Scotland
Tel: (0141) 445 0121
Fax: (0141) 445 0122
Sales, Ireland
Tel: (028) 9335 2999
Fax: (028) 9332 3232
More Information
Colours & finishes
- Scraped texture - weber.rend TTS
- Dry dash - weber.rend TTC + aggregates
- Synthetic finishes