EIFS Inspection Procedures & Quality Control 5

Question 1

An EIFS inspector observes efflorescence staining on the finish coat surface. What does this condition most likely indicate?

Accepted Answer

Moisture migrating through the substrate dissolving salts and depositing them on the surface

Answer

Efflorescence occurs when water transports soluble salts through the substrate or base coat to the surface, indicating ongoing moisture movement through the assembly.

Question 2

During inspection, an EIFS applicator claims that two competing manufacturer's base coat and finish coat products were mixed on the project. What is the inspector's appropriate response?

Accepted Answer

Flag the non-compliant combination and require documentation of manufacturer approval or require removal

Answer

EIFS systems must use components from the same manufacturer or have documented manufacturer approval for mixing, as compatibility affects performance and warranty validity.

Question 3

What is the minimum dry time typically required between base coat application and finish coat application in EIFS installation?

Accepted Answer

24 hours or until the base coat is fully cured and uniformly gray

Answer

The base coat must be fully cured (typically 24 hours under normal conditions) and uniformly gray or off-white before the finish coat is applied to prevent moisture-related defects.

Question 4

An inspector finds that mechanical fasteners in a mechanically attached EIFS system are placed 12 inches from the EPS board edge instead of the 6-inch maximum specified. What is the primary concern?

Accepted Answer

Inadequate edge support causing board rocking or deflection under wind load

Answer

Fasteners too far from panel edges allow the EPS board edges to flex or rock, which can cause lamina cracking and reduce the system's wind load resistance.

Question 5

Which EIFS quality control step requires the inspector to evaluate the 'notch size and pattern' of the trowel used during installation?

Accepted Answer

Application of adhesive to EPS boards in adhesively attached systems

Answer

The notch trowel size and pattern control adhesive coverage and thickness when bonding EPS boards, directly affecting bond strength and performance of adhesively attached systems.

(EIFS) Certified Exterior Insulation and Finish Systems Inspector Practice Test

(EIFS) Certified Exterior Insulation and Finish Systems Inspector Practice Test

EIFS Inspection Procedures & Quality Control 5