Sliding Glass Door

Sliding Glass Door

Why Some Sliding Glass Door Thresholds Fail

Common Problems:

  • Improper flashing.
  • Inadequate vertical offset between the interior and exterior surfaces.
  • Lack of a bituminous or plastic protection barrier between the aluminum threshold and the concrete or sheet metal substrate.

Potential Damage:

  • Water intrusion into the framing system and living spaces resulting in:
  • Dry rot in the wood framing system.
  • Water-stained gypsum board.
  • Damaged flooring materials, carpeting and interior furnishing.
  • Corrosion of aluminum threshold due to lack of protection barrier.

Proper Solutions:

  • Provide a 1-1/2 inch vertical offset between the interior and exterior surfaces.
  • Provide a weather-tight, fully sealed or seamless sill/jamb flashing system that protects the corners of the threshold and counter flashes the deck system.
  • Provide a bituminous or plastic protection barrier between the aluminum threshold and the concrete or sheet metal substrate.

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.