TIMBER FOLDING DOOR TECHNICAL DETAILS

Timber folding sliding doors are manufactured from hardwood and softwood harvested from sustainable sources. Hardwood profiles are spliced into three sections and then glued together under high pressure with the grains running in opposing directions. Laminating the timber in this way helps to prevent twisting and distortion.

Softwood doors are manufactured from engineered Pine which is laminated and comb jointed.

Laminated timber

We use engineered Meranti for our hardwood folding doors but can also offer European Oak at extra cost.

Squared panels Using modern technology the panels are cramped squarely and all timber joints are bonded under pressure using polyurethane adhesive often used in aircraft construction. Polyurethane adhesive becomes harder in a moist environment which allows us to guarantee the structural integrity of these doors for a full ten years*

*Subject to minor routine maintenance

FLUSH THRESHOLD OPTION

Our timber bi-folding doors can be supplied with a flush threshold although other threshold options are available including an external projecting cill.

Flush threshold

CONCEALED RUNNING GEAR

Concealed running gear
All the running gear is concealed and panels run on maintenance free stainless steel wheel carriages in top and bottom tracks that operate quietly and smoothly to ensure ease of operation.

HIGH SECURITY HINGES

Our hardwood and softwood folding sliding doors are fitted with high security hinges to prevent the pins being removed and the hinge being forced from the door. Hinge fixings are only accessible when the door is open unlike some systems that use face-fixed hinges. Hinges are available in black, white or bronze.

HIGH SECURITY LOCKING SYSTEMS

High security locking systems

Traffic doors on our folding doors are fitted with hardened steel multi-point high security hook bolts, shoot bolts and dead bolts locking systems as standard. The profile key cylinder is protected on the outside by a steel cylinder guard ensuring that the cylinder cannot be pushed, pulled or snapped by an intruder attempting to gain entry.

Intermediate panels feature internally operated shoot bolt locking to the top and bottom of the door and the stiles feature a tongue and groove channel that enable the door panels to lock together when the door is closed for enhanced security.

HANDLES

Handles The intermediate panels on our timber folding doors are fitted with fold flat handles that allow the operation of the shoot bolt locking system whilst folding flat to allow panels to fold completely flat when the door is fully open.

Handles Traffic doors are fitted with a high security version of the same fold flat lever handle which also incorporates a security cylinder guard to prevent the cylinder being attacked from the outside. The key is inserted through a slot in a stainless steel spinning disc.

Handle colour choices are gold, chrome, white or black.

HIGH PERFORMANCE WEATHER RATING

Handles Our timber bi-folding doors feature twin rubber EPDM weatherseals on each side of each panel and high performance weather seals at the top and bottom of each panel to ensure the high performance of the door.

The door has been tested at a UKAS accredited testing station and passed the PAS23 weather test to extreme weather conditions of over 300 pascals.

A RATED FOR THERMALLY EFFICIENCY

All our folding doors are designed to minimise heat loss from your property and have been tested for their thermal efficiency.

BFRC Simulated test results The thermal rating of any material is currently measured in U value which records heat loss through the product. The lower the U value the greater the insulation value of the product.

Timber is a natural insulator and is one of the most thermally efficient building materials available. When glazed with our Tripleshield Low E double glazing our timber folding door achieves an exceptionally low 1.4 U value.

Tests have also been simulated under BFRC criteria which confirm that our hardwood and softwood bifold doors achieve an A rating.

1.1 U-VALUE DOUBLE GLAZING

Softwood and hardwood bifold doors are now supplied with STAYCOOL double glazing as standard providing an exceptionally low 1.1 U-value ensuring maximum heat retention during the colder months of the year. STAYCOOL also provides solar control benefits for the summer reducing glare by 35% and solar heat reflection of 57% protecting your home and furnishings.