EIFS – surface cracking at junction with different material

EIFS (Exterior Insulation and Finish Systems) are a type of wall cladding where polystyrene sheets typically have a plaster-based coating and paint finish. There is often a fiberglass-reinforced base coat and jointing system and textured polymer or acrylic finish coats.
The weathertight performance of EIFS claddings is very dependent on good quality detailing and installation, the jointing system including sealants remaining in good condition and coatings being well maintained.

Causes

Different levels of thermal movement

Listed under: Exterior, cladding, walls, moisture, leaks, wall cladding, exterior insulation and finish systems (EIFS)

Cause

Different levels of thermal movement

Repair

  • surface cracks in an EIFS cladding can reduce the protection given by the coating and should be addressed as soon as possible to prevent penetration by water

  • EIFS claddings are mostly proprietary systems. Contact the original installer (if known) or another manufacturer-approved specialist applicator for advice

  • inappropriate DIY repairs may lead to further problems and could void any warranty that may still apply

  • once the cladding junction has been repaired, inspect the cladding, joints and junctions at least once a year and ensure that they remain in good condition. Gentle washing with clean water and detergent can remove dirt

  • government reports have found that EIFS systems installed from the mid-1990s to the mid-2000s have had a comparatively high rate of weathertightness failure on high-risk dwellings. (High risk dwellings include exposed sites, complex layouts with multiple wall and roof junctions, multiple levels, narrow or no soffits, membrane decks intersecting walls.) If your house dates from this period and you suspect there may be leaks through the cladding, engage an experienced New Zealand Institute of Building Surveyors (NZIBS) registered building surveyor to look at the building

  • houses constructed between 1995 and 2005 could also have untreated framing timber. This makes them more vulnerable to weathertightness problems, so it is very important to monitor their weathertightness and have a rigorous maintenance regime in place

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