A Beautiful Part of a Bigger Picture.
Casemasters are a affine example of what a hard working window should be. Their sleek, modern engineering even extends to the folding handle, which is designed not to interfere with window treatments. They offer expansive views and ample air circulation plus a structural integrity to protect against air and water infiltration. The Marvin Casemaster meets WDMA DP50, one of the Window and Door Manufacturers Association's best ratings for air and water infiltration and structural integrity.