The windows brand is "Ply Gem Windows". They were ordered from a local lumber yard, not a national chain like Lowe's. (Prices can vary wildly depending where you live. When the same installer put in my new patio door, he steered me to Lowe's as the best price, I went in and ordered that myself.) Since my house was built in 1967, they were for that era a standard size. The installer measured all 17 windows for Ply Gem to go by. For the windows and installation, not to mention my assistance (I mostly picked up trash!) the total cost was just under $8K.