Rigid insulation boards on an exterior wall have open gaps and unsealed joints where the air barrier detail requires continuity. What correction is appropriate?
Correct Answer
C) Correct board fit and seal joints as required by the air/water barrier design
Insulation and air/water barrier details often rely on tight, sealed joints for continuity; open gaps should be corrected according to the design. Other choices ignore air and moisture control or use cosmetic cover-up.
Why This Is the Correct Answer
Insulation and air/water barrier details often rely on tight, sealed joints for continuity; open gaps should be corrected according to the design. Other choices ignore air and moisture control or use cosmetic cover-up.
Why the Other Options Are Wrong
Option A: Leave gaps because insulation only controls temperature
The trap in A is Leave gaps because insulation only controls temperature. That selection is wrong because it tries to bypass the Insulation gaps checkpoint.
Option B: Stuff random scrap material in the joints without sealing
Choice B gives Stuff random scrap material in the joints without sealing. Its specific error: it leaves the work at an informal or incomplete stage, while Insulation gaps requires Correct board fit and seal joints as required by the air/water barrier design.
Option D: Add thicker finish coating to bridge the gaps
In thermal and moisture protection, Add thicker finish coating to bridge the gaps is the wrong selection for Insulation gaps: it answers the Insulation gaps prompt with the wrong practical move.
Memory Technique
Use the phrase "problem, control, result" for insulation gaps; the result side is Correct board fit and seal joints as required by the air/water barrier design.
Reference Hint
Open ANSI/EIMA 99-A-2017, Exterior Insulation and Finish Systems; use the index entry or section for "EIFS insulation board fit and air/water barrier continuity" to confirm that Insulation and air/water barrier details often rely on tight, sealed joints for continuity; open gaps should be corrected according to the design.
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