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Elmdor Stoneman

Elmdor Stoneman 

17451 Hurley Street 
City of Industry, CA
91714 USA

(800) 591-9181


Elmdor/Stoneman was founded on the principle of design and production of quality sheet metal fabrication. Five decades of experience and innovative engineering have enabled us to become a well-established, high-volume, low cost producer of access doors, roof flashings and roof hatches.

Key Products

Elmdor/Stoneman Manufacturing is a subsidiary of Acorn Engineering Company  that specializes in the manufacturing and distribution of high quality:


Access Doors

Elmdor Access doors provide easy access to components concealed behind a wall. Access doors are manufactured from durable steel for a variety of wall types and applications in commercial and institutional buildings.


Roof Flashings

Roof flashings are installed on vent pipes where they pass through the roof. Stoneman manufactures roof flashings that fit a variety of pipe sizes for a secure fit.


Roof Hatches

Roof Access Hatches are designed to provide convenient access to the roofs of buildings, allowing for ladders and stair access to the roof from the interior of the building. Elmdor Roof Access Hatches are designed and engineered for durability and safety, with ease of installation. The Roof Access Hatches install easily over the roof opening and are secured from the base flange to the roof.



Trisolators serve a variety of functions for piping support, including preventing the transmission of sound, absorbing vibrations, preventing electrolytic action, cushioning the piping and preventing the support from damaging the piping.


  • Elmdor®-Line of Access Doors
  • Elmdor/Stoneman® -Legal Company Name

Elmdor/Stoneman Brandmark