Slide Folding Doors.

High Performance Thermally Enhanced Bi-Folding Door

Metal Technology's thermal range of Bi-Folding doors are the perfect solution to open up your home and bring the outside in, while keeping the elements out. Our Bi-Fold doors offer a wide range of designs from two to seven panes and up to 6 metres in width giving architects, clients and specifiers total design flexibility. The door can also be used in a single door application. Door sashes can accommodate either open in or open out applications, with an option of either curved or flush profile door leaves or fully rebated or low thresholds.

Thermal Performance
Metal Technology's Bi-Fold doors offer exceptionally low U values using bespoke polyamide thermal isolators designed to minimize heat transfer across the door profiles. This can be further enhanced with a high insulation (Hi+) option of uniquely designed cellular foams which enclose internal cavities within the profile, further reducing heat loss and providing one of the most thermally efficient systems available.

* Door U values based on 3000 x 2200m three pane Bi-fold using warm edge swiss spacer V bars and fully rebated thresholds.

Metal Technology can provide tailored U-value calculations using their dedicated estimating software to calculate overall project average door U-values for their full range of systems.

Frame and door sash members are mitre cut at 45 degree. Corners are reinforced with extruded aluminium crimping cleats and corner braces. A secure joint is formed by pneumatically crimping into the extruded crimping cleat. Mullion and transom bars are square cut, shaped and fixed securely to the frame by means of stainless steel screws and fixing cleats. All frame joints are sealed during construction against entry of water using Metal Technology's two part adhesive. Metal Technology recommend that only A2 or A4 austenitic (300 series/class 70) stainless steel fixing screws are used in the assembly of their products.

This system offers internally glazed sashes and can accommodate glazing units from 28mm to 50mm units.


click here for System 26 Hi / Hi+ brochure          click here for technical manual



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#1 Customer Service

The underlying objective of Customer care carried out within Alternative Windows will continue to be aimed at maintaining an environment in which everyone employed and associated with the Company perceives themselves as purveyors of quality within Customer relationships.

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Sycamore House, Cross Green Industrial Estate Knowsthorpe Lane, Leeds LS90PJ

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Freephone No: 0800 035 4180

Telephone:  0113 2483773
FAX:  0113 2482123