Walkout Basement Bedroom, Beam Clearance, and Wet Foundation
A walkout-basement remodel creates a new bedroom, a bathroom, and a hallway. The bedroom has a sliding window with a clear opening 22 inches wide and 46 inches high; the sill is 50 inches above the finished floor. The hallway passes under a 6-inch-deep beam spaced 8 feet on center; the finished clearance under the beam is 6 feet 6 inches. The bathroom has a 6-foot-8-inch ceiling over the shower. The basement foundation wall has a horizontal crack with efflorescence, and the floor slab slopes toward the wall. The contractor proposes to cover the crack with a waterproof coating and install a dehumidifier. The owner wants to know whether the bedroom can be signed off and whether the crack repair is enough.
1. Does the bedroom window satisfy the emergency escape and rescue opening requirements? Show the calculation.
Read the worked answer
No, because the sill height fails. IRC R310.2.1 requires a net clear opening of at least 5.7 square feet, a minimum net clear width of 20 inches, a minimum net clear height of 24 inches, and a sill no more than 44 inches above the floor. The window gives 22 inches by 46 inches, or 1,012 square inches, which is 7.03 square feet; both 22 inches and 46 inches exceed the minimum dimensions, so area and dimensions pass. The 50-inch sill exceeds 44 inches, so the opening fails. Lower the sill, use a different window, or provide an approved design that meets the escape requirements. If the window is below grade in a window well, the well must also meet R310.2.3 for size and ladder or egress provisions.
2. Is the 6-foot-6-inch clearance under the hallway beam acceptable, and what about the 6-foot-8-inch bathroom ceiling?
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The hallway beam can be acceptable only under the beam exception. Habitable spaces and hallways generally require 7 feet. The exception permits beams or girders spaced at least 4 feet on center that project no more than 6 inches below the required ceiling height. Here the beam is spaced 8 feet on center and is 6 inches deep, so the 6-foot-6-inch clearance fits the exception, assuming the measurement is from finished floor and the member is actually a beam or girder, not a duct or soffit. The bathroom may have a ceiling height of not less than 6 feet 8 inches, so that dimension is acceptable. Document the beam spacing and projection.
3. Is coating the foundation crack and adding a dehumidifier an acceptable repair?
Read the worked answer
No. A horizontal crack with efflorescence and a slab sloping toward the wall suggests moisture movement and possibly structural distress. R405 requires foundation drainage around basement walls that retain earth and enclose habitable or usable space below grade, and R406 requires dampproofing or waterproofing and proper crack repair. A surface coating and dehumidifier treat symptoms, not the water source. The inspector should require evaluation by a design professional, correction of grading and drainage, proper exterior or interior drainage, and a repair method appropriate to the crack. The wall should not be covered until the repair is inspected. If the crack is structural, an engineered repair is required.