has some information on the types of patio doors that can be installed in the home.

Extention glass doors and skylights Aluminium External Folding Doors, Folding Sliding Doors, Concertina Doors, Patio Door, Bi-Folding Doors

House Extension Ideas & Designs | House Extension Photo Gallery

Removed old conservatory and re built a new extension. To create large open plan kitchen and dining area. 2 x Sets of bi-fold doors onto decked area with skylights and vaulted ceiling. We imported the handleless kitchen from Germany.