Performance Standard: Exterior doors shall not warp to the extent that they become inoperable, cease to be weather-resistant, or exceed National Wood Window and Door Association Standards of 1/4 inch measured diagonally from comer to comer.
Corrective Measure: The remodeler will correct or replace and refinish defective doors during the warranty period.
Discussion: Exterior doors will warp to some degree because of the difference in the temperature between inside and outside surfaces. Warping may also be caused by improper or incomplete finishing the door, including sides, top, and bottom.