Flashing Fails

Common Problems:

• Incorrect sequencing of flashing installation resulting in improperly lapped building paper and BCRFM (barrier-coated, reinforced flashing material), often identified as Sisalkraft paper

• BCRFM paper cut too short or missing

• Use of improper materials in window flashing such as using cut-up building paper instead of BCRFM paper

• Omission of butyl sealant bead around bottom and slides of window units between the flange and BCRFM paper

Potential Damage:

Water intrusion into the framing system and living spaces resulting in:

• Dry rot in the wood-framing system

• Water-strained gypsum board

• Damaged flooring materials, carpeting and interior furnishings

Proper Solutions/Construction for Aluminum and Vinyl Window Flashing:

• Installation should be per Uniform Building Code Section 1707(b)

• Use only approved materials

• Follow window manufacturers' details for installation of flashing materials

• Follow industry standard details, such as those of the Plastering Information Bureau

Information provided by Building Analysts, a full-service architectural and engineering firm with many years of experience in construction litigation. Their services include: architectural and structural investigations, repair recommendations, preparation of exhibits and expert testimony. Contact Building Analysts Toll Free at: (800) 352-1497.