Q: How thick does the insulation board need to be?
A: Boards are available in thicknesses from 40mm - 200mm, in 10mm increments. The thickness of board is determined by the U-value required. Weber can work this out for you, please contact your Area Sales Manager for more information.
Boards vary in sizes depending on the type: EPS = 1220x610mm MFD = 1200x600mm PIR = 1200x600MM PHS = 1200x600mm
Q: What will the U-value be?
A: Weber can work out the u value and condensation risk for you based on the whole wall build up. Click here for a table of generic U-values.
Q: Can I insulate timber frame externally?
A: No. Timber frame requires a ventilated and drained cavity and therefore any external insulation is giving no thermal benefit.
Q: How many fixings do I need?
A: The number of fixings depends on the substrate and the fixing methodolgy of the chosen system. See relevant specification sheet.
Q: How deep do the fixings need to go in?
A: The depth of the fixings is dependant on the substrate and the required pull out load. Contact our technical services department for advice quoting the project name and address.
Q: Can EWI system be repaired?
A: Yes - please consult your O&M manual for the project or click here for general advice.
Q: How do I fix components such as a rain water pipe or signs to an insulated render system?
A: Any fixings must be anchored back to the substrate, not the applied EWI system. Click here for general advice.
Points to note: Care should be taken not to compress the system and with this in mind, percussive drilling should not be used. Mastic seals should be applied so as to avoid water ingress, these should then be checked periodically to ensure the efficacy of the seal.
Q: What type of insulation is incorporated in the system?
A: There are various types of insulation: weber.therm EPS (expanded polystyrene) weber.therm MFD (mineral wool) weber.therm PHS (phenolic) and weber.therm PIR (polyisocyanurate).
What temperatures can I apply the materials in?
Generally, cement based materials can be applied between 5°C and 30°C. Specific information can be found on the individual datasheets or working with weather advice.