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Screen2 (PSF)

Screen door drawn in Line art

A screen door can refer to a hinged storm door covering an exterior door or the screened sliding door used on a sliding patio door. In either case, the screen door incorporates screen mesh to keep flying insects from getting in to the living spaces. For the purposes of this description, a screen door will be considered to be the type used on a sliding patio door.

ConstructionEdit

Sliding screen doors are generally constructed by two methods. They can be rollformed from thin aluminium sheets into a rectangular shaped door frame which incorporates a screen channel to hold the window screen material. Sliding screen doors can also be made from extruded aluminum shapes. In both cases the rectangular rollformed or extruded shapes are joined together into a door frame using metal corners or screws.

DesireGreenHouseDoorway

Screen door of a flood damaged house, in Desire neighborhood, Upper 9th Ward, New Orleans after Hurricane Katrina

Rollformed aluminum sliding screen doors are the least expensive to produce because they can be manufactured from thin aluminum sheet formed into a relatively strong rectangular shape. Rollformed screen doors have mitered corners into which a steel or aluminum alloy corner is forced using a friction fit. If a steel corner is used, the rollformed sections are often pierced or staked into the corners, to help secure the corners together. If aluminum alloy corners are used, the corner relies on its friction fit alone to hold the door frame together.

In both cases, the weakest point of a rollformed sliding screen door is the corner. After repeated opening and closing, stresses will cause the rollformed shape to loosen in the area of the corner. The door will then stick and jam and typically will require replacement rather than repair.

Extruded aluminum screen doors are made from thicker aluminum than rollformed doors. This makes an extruded aluminum door much stronger but also more expensive. Extruded aluminum screen door frames can be mitered and joined with aluminum alloy corners or can be notched out and joined together with screws that fit in screw holes made as part of the extrusion process.

Extruded aluminum screen doors are generally longer lasting than rollformed screen doors. They are also more easily repaired since, if the corners break, new corners can be inserted without losing the friction fit necessary to hold the door together.

An alternative to aluminum frame screen doors is retractable screen doors which 'disappear' into housing when not in use.[1]

See also Edit

External links Edit

NotesEdit

  1. An example of a retractable screen door
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