Sliding Door Technical FAQS

Please take a moment to look through our frequently asked sliding door technical questions. If your query is not answered here then please feel free to contact us on 0800 171 2908. To view the answers click the relevant question to your query. 

Do you supply sliding door systems that are fire rated?

Yes, the Marathon system has a fire door set available. We can also offer systems as special order.

How can I achieve a clear threshold?

We recommend using continuous floor channel on all commercial applications and doors over 1000mm wide on domestic applications.

When should I use bottom rolling gear instead of top hung sliding gear?

When there is insufficient strength in the head of the opening to carry the weight of the door.

Are the sliding systems tested?

Yes, most have test certificates to BS or EN standards. Generally partition systems have testing of 200,000 open and close cycles, and furniture systems are tested to 40,000 cycles.

Can soft close be used on sliding doors?

Yes, most furniture systems have this option and some partition door systems now also have an option.

Do you offer an installation service?

Sorry we do not offer an installation service.

Do you sell the doors to go with the door hardware?

No, we don’t supply the actual doors, but we do supply any associated ironmongery.

What maintenance is required for sliding door gear?

A system which is specified correctly will not require a great deal of maintenance. Most industrial systems will require the track and hangers to be greased every six months. Commercial systems require no greasing but benefit from having the track, and any guide channel, cleared of obstruction and dirt build up. All systems should have their fixings checked for tightness every six months.

How many hangers do I need to operate my door? If I add more hangers can I use a heavier door?

The standard number of hangers for a straight sliding system is two. Adding an additional hanger will not increase the allowable door weight as the weight will only ever be carried on two hangers. The number of hangers required for a folding system is determined by the number of doors to be used.

What do I need to know before contacting Hafele to obtain a specification?

The most important consideration is the weight of the door. Other factors which are important are the height of the door, the number of doors required, whether the application is internal or external, is there strength in the head of the opening to carry the door weight and is there room for the doors to be parked at the side of the opening. Environmental circumstances are also important e.g. is it to be used in a high use environment such as a school or hospital, will the gear be exposed to corrosive elements etc.