The Elmdor/Stoneman Manufacturing Company, a part of Acorn Engineering, specializes in access doors and roof flashing accessories. Elmdor has a reputation of having the widest variety of standard access doors than any other manufacturer. Elmdor supplies fire rated, dry wall, acoustic ceiling, metal lath, security and vandal resistant access doors. Their roof flashings are designed for flashing all roof penetrations. Supplied flashings are made of seamless lead and are available with counter flashing and vandal resistant flash hoods made of UV resistant PVC or cast iron.