Cornerstone's Patio Doors Add Beauty To Your Home.
A beautiful maintenance free exterior, made of thick extruded aluminum, provides strength and protection while offering the warmth and beauty of wood to your home's interior.


Our Unique Design Allows Our Doors To Adapt To Different Building Applications.
Cornerstone doors are reversible. This allows the active door to be either left or right-handed. The unique design of the frame cladding allows the door to adapt to different wall thickness, so there is no need for costly jamb extensions.

Energy Efficiency Is Maximized With Cornerstone's Sliding Patio Doors.
Cornerstone's active panel glides freely along a stainless steel track. As it closes, weatherstrip forms a tight seal between the panels and at the frame.

Energy efficiency doesn't stop with the weatherstrip. Because fiberglass does not conduct cold, a one-piece fiberglass sill is used to stop the problems of frost and condensation.

Low-E2 glass will maximize energy savings. This double coated glass is filled with argon gas, and has a stainless steel warm edge spacer to give optimal insulating value to the room. The glass stays warmer so there is less chance of condensation or frost build-up.

The glass is glazed to the sash with silicone caulk and foam tape. Silicone is one of the industries best sealants. It has excellent mobility allowing glass to expand and contract in changing temperatures without breaking. Foam tape provides a secondary seal that gives the glass edge a clean look.

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