EIFS Inspection Procedures & Quality Control 3

Question 1

During an EIFS inspection, an inspector uses a probe penetration instrument on a suspect area and reads 22% WME. What does this most likely indicate?

Accepted Answer

Elevated moisture that warrants further investigation or destructive testing

Answer

A WME reading of 22% is elevated and suggests potential moisture accumulation behind the EIFS, warranting additional evaluation such as core sampling.

Question 2

What is the primary purpose of the 'backwrap' detail in EIFS installation?

Accepted Answer

To terminate the mesh and lamina cleanly and weatherproof at system edges

Answer

Backwrapping folds the mesh and base coat around the EPS board edge, sealing the termination to prevent moisture intrusion at system edges.

Question 3

An inspector finds that EPS board joints were staggered at horizontal courses but were aligned at a window corner. What deficiency does this represent?

Accepted Answer

A stress concentration point that can lead to diagonal cracking at the corner

Answer

EPS joints aligned at window corners create stress concentration points where diagonal cracking often initiates; boards must be cut so joints do not land at corners.

Question 4

Which condition is considered a critical deficiency requiring immediate remediation in a drainage-type EIFS system?

Accepted Answer

Blocked weep screed preventing moisture drainage at the base

Answer

A blocked weep screed prevents moisture from draining out of the drainage cavity, defeating the drainage system's purpose and risking structural damage.

Question 5

Under ASTM E2570, what parameter is evaluated during a water-resistive barrier inspection for EIFS?

Accepted Answer

Water penetration resistance of the WRB over simulated openings

Answer

ASTM E2570 evaluates the water resistance of WRBs used with EIFS by applying water at specified pressure over test openings to detect leakage.

(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 3