EIFS EIFS Repair, Remediation & Maintenance 2 — Questions and Answers
Question 1: Mold growth discovered behind EIFS cladding during remediation should be addressed by:
- Painting over it with a mold-inhibiting primer
- Drying the substrate and applying antifungal treatment per EPA guidelines before re-cladding (Correct answer)
- Leaving it in place and improving ventilation only
- Documenting it and proceeding with EIFS reinstallation immediately
Correct answer: Drying the substrate and applying antifungal treatment per EPA guidelines before re-cladding
EPA guidelines require proper mold remediation — drying the substrate, removing contaminated material, and treating with antifungal agents — before any new cladding is applied.
Question 2: Which type of sealant joint failure is characterized by separation of the sealant from the substrate on one or both sides?
- Cohesive failure
- Adhesive failure (Correct answer)
- Fatigue failure
- Compression failure
Correct answer: Adhesive failure
Adhesive failure occurs when the bond between the sealant and the substrate breaks, rather than the sealant tearing within itself.
Question 3: When matching a finish coat color for a repair, the best approach is to:
- Use any white finish coat and paint over it
- Contact the original system manufacturer for the exact formula or provide a sample for color-matching (Correct answer)
- Apply a darker shade to hide the repair area
- Use a universal pigment added to a generic finish coat
Correct answer: Contact the original system manufacturer for the exact formula or provide a sample for color-matching
Manufacturer color-matching or providing a physical sample ensures the closest possible match in both color and texture, minimizing the visibility of the repair.
Question 4: In EIFS maintenance, weep screed or base-track weep holes should be inspected for:
- Structural deformation under load
- Blockage by caulk, paint, or debris that prevents drainage (Correct answer)
- Proper fastener spacing
- Mesh termination continuity
Correct answer: Blockage by caulk, paint, or debris that prevents drainage
Blocked weep holes prevent water from exiting the drainage cavity, negating the purpose of the drainage system and promoting moisture accumulation.
Question 5: A property owner asks about the recommended frequency of EIFS sealant joint inspection and maintenance. The standard industry recommendation is:
- Every 10 years
- Every 5–7 years
- Annually or after major weather events (Correct answer)
- Only when visible cracking is observed
Correct answer: Annually or after major weather events
Annual inspections plus post-storm inspections are recommended because sealants degrade over time and severe weather can damage joints that otherwise appear intact.
Question 6: When installing a new sealant over an existing failed sealant joint, the correct procedure is to:
- Apply new sealant directly over the old sealant to fill gaps
- Remove all old sealant completely, clean the joint, and install new backer rod before applying fresh sealant (Correct answer)
- Spot-fill only the cracked sections of the old sealant
- Sand the old sealant surface and apply primer before new sealant
Correct answer: Remove all old sealant completely, clean the joint, and install new backer rod before applying fresh sealant
Old sealant must be fully removed to ensure the new sealant bonds properly to the substrate and that the correct sealant geometry is achieved with new backer rod.
EIFS EIFS Repair, Remediation & Maintenance 2
Mold growth discovered behind EIFS cladding during remediation should be addressed by: