Inspection Procedures & Quality Control Flashcards

What inspection technique is used to locate hollow or delaminated areas in an EIFS lamina without removing material?

Answer: Sounding (tapping) the surface with a hard mallet

Sounding or 'tap testing' produces a hollow sound where the lamina has delaminated from the EPS board, identifying problem areas without destructive investigation.

According to EIFS industry guidelines, how far above finished grade should the bottom termination of an EIFS system be located?

Answer: A minimum of 8 inches above finished grade

EIFS should terminate a minimum of 8 inches above finished grade to prevent wicking, soil contact, and moisture intrusion at the base of the system.

During quality control inspection, an inspector finds that a second layer of reinforcing mesh was not installed in the impact zone as specified. What is the consequence?

Answer: Reduced impact resistance that could allow penetration of the lamina

A double-layer mesh in the impact zone (typically the bottom 6–8 feet) is required for enhanced impact resistance; omitting it leaves the system vulnerable to damage.

What does an EIFS inspector look for when evaluating expansion joint placement on a large wall?

Answer: Joints aligned with structural building joints and at specified intervals to accommodate movement

Expansion joints must align with structural building movement joints and be placed at specified intervals (typically every 70–100 linear feet) to prevent cracking from thermal and structural movement.

An inspector reviewing EIFS mock-up test results sees that the water penetration test (ASTM E331) failed at 6.24 psf. What does this mean for the project?

Answer: The mock-up assembly allowed water penetration and must be corrected before full installation proceeds

A failure at ASTM E331 means water penetrated the assembly at the test pressure, requiring investigation and correction of the assembly before full-scale installation.

Which area of an EIFS installation is MOST prone to cracking due to differential movement and should be given extra scrutiny during inspection?

Answer: Transitions between EIFS and dissimilar cladding materials

Transitions between EIFS and other cladding materials experience differential movement, thermal expansion differences, and sealant stress, making them high-risk crack zones.

When conducting a final EIFS inspection for project closeout, what record is essential to document system warranty eligibility?

Answer: Manufacturer's certificate of compliance or registered warranty documentation

Manufacturers require registration of the installed system with approved materials and installer credentials to validate warranties, making this certificate essential for closeout.