EIFS EIFS Repair, Remediation & Maintenance 1 — Questions and Answers
Question 1: Before applying a patch over damaged EIFS, the inspector should verify that the substrate is:
- Wet to ensure adhesion
- Dry, sound, and free of contaminants (Correct answer)
- Primed with an acrylic bonding agent only
- Sanded smooth regardless of condition
Correct answer: Dry, sound, and free of contaminants
A dry, sound, and contaminant-free substrate is essential for patch repair materials to properly bond and prevent future delamination.
Question 2: When repairing a delaminated area of EIFS finish coat, the damaged section should be cut back to a minimum of how far beyond the visibly affected area?
- 1 inch
- 2 inches (Correct answer)
- 4 inches
- 6 inches
Correct answer: 2 inches
Cutting back at least 2 inches beyond visible damage ensures the repair overlaps onto sound material, preventing re-delamination at the repair perimeter.
Question 3: Which repair method is appropriate for a small puncture or impact crack in the EIFS lamina that has not compromised the insulation board?
- Full system removal and reinstallation
- Fill with compatible base coat and finish coat matching the original system (Correct answer)
- Apply a roofing mastic over the damaged area
- Cover with a self-adhered flashing membrane only
Correct answer: Fill with compatible base coat and finish coat matching the original system
Small lamina repairs are made by filling with compatible base coat and applying matching finish coat to restore the original system continuity and appearance.
Question 4: When an EIFS repair requires embedding new reinforcing mesh, the new mesh should overlap the existing mesh by a minimum of:
- 1 inch
- 2 inches
- 2.5 inches (Correct answer)
- 4 inches
Correct answer: 2.5 inches
Standard EIFS industry practice requires a minimum 2.5-inch (approx. 65 mm) overlap of reinforcing mesh to maintain tensile continuity across the repair area.
Question 5: An EIFS wall shows widespread alligator cracking of the finish coat. The inspector's most likely conclusion is:
- Normal aesthetic aging requiring no action
- Base coat shrinkage from improper water-to-powder ratio during mixing (Correct answer)
- Impact damage from hail or debris
- Thermal movement in the insulation board
Correct answer: Base coat shrinkage from improper water-to-powder ratio during mixing
Alligator or map cracking typically results from a base coat mixed with too much water, causing excessive shrinkage upon drying.
Question 6: Prior to any EIFS repair work, the project specification should be reviewed to confirm:
- The original contractor's license number
- The system manufacturer, product lines, and applicable warranties (Correct answer)
- The building owner's insurance policy limits
- Local prevailing wage rates
Correct answer: The system manufacturer, product lines, and applicable warranties
Knowing the original system manufacturer and product lines ensures repair materials are compatible and that manufacturer warranty requirements are maintained.
EIFS EIFS Repair, Remediation & Maintenance 1
Before applying a patch over damaged EIFS, the inspector should verify that the substrate is: