From their website:
Alside represents nearly six decades of inspired innovation. Founded in 1947, Alside is a leading manufacturer of vinyl siding and accessories, vinyl windows and patio doors, and fencing and railing products for the residential and commercial remodeling and new construction markets.
With headquarters in Cuyahoga Falls, Ohio, Alside has nearly 3000 employees in its seven manufacturing facilities (Cuyahoga Falls OH; West Salem OH; Ennis TX; Cedar Rapids IA; Kinston NC, Bothell WA; Yuma AZ). Alside products are distributed to licensed professional remodeling contractors and home builders through our network of over 90 Alside Supply Centers and also through select independent distributors across the country.