Why doesn't a Jehovah's Witness Kingdom Hall have windows?

Security:Unlike many churches, they do not have a parish residence to keep an eye on their belongings inside the Hall.

- Cost: Installing windows takes more time to install during construction than a plain wall. Double-pane windows cost more per square foot than brick or siding. Windows produce higher heating and cooling costs.

- Volunteer Labor: Kingdom Halls are built by Jehovah’s Witnesses who volunteer their time to work when available as quickly as possible. The typical build-time allotted for the complete structure is three days – Friday through Sunday.