
About this product
weber.therm XM is a high performance external wall insulation system protected by meshcloth reinforced polymer renders.
weber.therm XM 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
- Low K-value insulants allow thinner insulation to be used or higher standards to be achieved
- Eliminates interstitial condensation by creating a 'warm wall' construction
- Suitable for, and effective on most buildings - including lightweight steel frame structures and in-fill panels
- 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 operative 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.
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 surface 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.
Materials
Beads, trims and flashings
Full system beads are available in polyester, powder coated
galvanised mild steel, grade 304 austenitic stainless steel
or aluminium in 3 m and 2.5 m lengths.
Render only beads are available in coated, galvanised, stainless,
coated aluminium or rigid plastic in 3 m and 2.5 m lengths.
Trims and flashings such as overcills and copings are available
in PPC aluminium in 2.5 m lengths or made to order.
Insulation
Rigid insulation boards are supplied from the following range:

Meshcloth
Balanced, open weave, alkaline resistant glass fibre meshcloth
is available in the following grades:

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
weber.rend LAC is a factory batched mortar for bonding and
scrimming within the meshcloth systems
Topcoats
Where specified, coloured topcoats are available for use as a background
for dry dash, a scraped textured finish or smooth float finish for synthetic
textured coatings.
Application
Fix base and other full system beads as specified.
Fix the insulation and render only beads (if specified)
as described in the System Specification Sheet or
relevant project documentation.
Mix and apply weber.rend LAC, lay-in meshcloth and
apply a further layer of mortar as directed.
Mix and apply the weber.rend PTC as directed to achieve
the desired finish.
Where a synthetic finish is required, apply the relevant primer
to the top coat or meshcloth coat, 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 support and advice
During the planning stages of a project, advice should be sought from Weber technical staff.
Advice based on technical expertise together with unrivalled practicalexperience 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 detailsmethod statements.
Contract Documentation: site packages, available throughthe specialist contractor. These include approved details, specificationand site procedures.
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 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 PTS
- Dry dash - weber.rend PTC + aggregates
- Synthetic finishes
- Rendered brick effect - weber.rend RBB ( brick base) + weber.rend RBF (brick face)
Problem Solutions
Case studies
- Strawberry Vale, Twickenham
- Elm Park Development - Dublin 4
- The Mulvey Centre - Carrick-on-Shannon
- Altolusso House, Cardfiff
- The Pinnacle, Limehouse Basin, London
- The Light House, London
- Project Co-operation Delivers Results
- The Mulvey Centre - Carrick-on-Shannon
- Strikingly Warm Facade
- Intero (Old Savoy Laundry)
- Cornish Units, Keighley
- Burley-in-Wharfedale
- Bradford West High Rise Regeneration Programme
- Change of use Challenge
- Altolusso House, Cardfiff
- UEA School of Nursing and Midwifery, East Anglia
- Travelodge-Norwich
- Thorntree & Fleet House, Middlesbrough
- Quality Finishes To Unique Buildings - Wins Prestigious Award
- Luxury living at the Light House
- The Lock, Manchester
- The Lock, Manchester
- The Pinnacle, Limehouse Basin, London
- Altolusso Stands Proud
- The Steelworks - Foley Street, Dublin
- The Steelworks - Foley Street, Dublin
- Travelodge-Norwich









