Wellcraft While all egress window well systems are designed to provide an easy and safe means of emergency escape from below-grade rooms, some come only in specific sizes, are custom-built, or must be assembled on site. But Wellcraft's 5600 Series Modular Egress Window Well System has stackable pieces that snap together to accommodate any window height or well depth. The snap-together design makes installation and transport easy, and the individual sections can be installed by one person. The system accommodates egress windows from 32 to 48 inches wide. 888.812.9545. www.wellcraftwells.com.