Bi-Folding Doors - Frequently Asked Questions

Here are some of the common questions we get asked. If your question isn't listed here then call 01268 571055 or e-mail

Are the doors internally or externally glazed?

Our doors are always internally glazed to increase security, ensuring there is no access to the beads from outside the property.

Can the doors open inwards or outwards?

Yes the Aluminium or UPVC Bi-fold doors can be made to open inwards or outwards, the choice is yours.

Although it is recommended that UPVC open inwards only

What's the difference between Aluminium Bi-folding doors and UPVC Bi-folding doors?

Aluminium Bi-folding doors are purpose made from a drawing board to be a Bi-fold door whereas the UPVC bi-folds use certain parts of the standard UPVC high security Residential doors which is why the UPVC Bi-folds are slightly cheaper than its Aluminium counterpart. Although UPVC bi-fold doors work and are widely used they have exposed hinges face fixed on the outside of the doors making them an obvious security risk. Aluminium doors are slimmer than UPVC due to Aluminium's greater strength like-for-like, therefore you can maximise the glass area of the doors. UPVC Bi-folds expand in the heat much more than Aluminium Bi-folds. Individual Aluminium doors have a maximum width capability of 1200mm whereas UPVC has a maximum width ability of 900mm. Aluminium has a maximum height advantage of 3000mm against UPVC being only capable of 2330mm (incl cill). Aluminium has a choice of over 200 RAL colours whereas UPVC has a choice of up to 11 colours. Aluminium doors can have level (15mm, sunk into the floor) walk-through thresholds, whereas UPVC cannot as the threshold is a minimum of 51mm.

What's the difference between Thresholds?

Both the Aluminium and the UPVC Bi-folding doors have a choice of ?low thresholds' or standard fully rebated thresholds. The difference between the two is that with a fully rebated standard threshold it offers severe weather rating whereas the low threshold does not ? it in effect offers excellent weather protection but is not recommended for areas of severe exposure. Both offer great weather protection for all areas of the UK. The low threshold option obviously offers the facility of level walk through from inside to outside of your property and can also be used as a division between your house and conservatory.

We offer a standard threshold which is 54mm high, or low thresholds which are 34mm & 22mm high. The standard threshold offers the best weather performance, with the low threshold best suited to sheltered or internal applications.

How secure are the doors?

Both the Aluminium and the UPVC Bi-folds offer the very latest technology in secure locking systems on the market today. And obviously both are internally glazed with safety glass as standard.

Are the doors difficult to maintain?

Both the Aluminium and the UPVC Bi-folds are very low maintenance. Both require regular lubrication and checking once a year or when ever the need arises.

What are the U Values for your doors?

Door U Values will differ from door to door, please ask specifically about the door of your choice. All doors are compliant to L1a, L2a, L1b and L2b of Building Regulations Doc L - April 2006.

Can I have more than 6 panels?

Yes in Aluminium, but our standard designs have a maximum of 6 panels. If you require more than 6 panels then please enquire and we will price accordingly.

My opening is less than 1400mm wide - can I have a Bi-fold?

No, the smallest opening is 1400mm - this is because each sash has a minimum width of 700mm.

My opening is greater than 6000mm wide - can I have a Bi-fold?

Yes, the largest standard opening is 6000mm - this is because standard aluminium bar length is 6500mm. We can manufacture doors greater than 6500mm to accommodate wider openings.

What thickness double glazed units can I have and can I have single glazing?

You can have between 6mm and 35mm units. We can supply the doors unglazed, single glazed or double glazed. Specialist glazing such as anti-sun, switchable privacy glass and integrated blinds can also be specified.

Do you do colours other than white?

Yes. As standard on aluminium we offer white and dark grey (anthracite), but we can supply them in any RAL colour. You can also have dual colours - e.g. brown on the outside and white on the inside.

Do I have to slide all the panels open to use the door?

No. A traffic door allows you to use the door without folding the panels. We recommend you have a traffic door if possible as it allows you to operate the door 'normally' during the winter months - when you don't want to fold the door fully open, and let in the cold air

If I order today how long will they take to arrive?

Generally 3-4 weeks after you have signed off your survey / manufacturing design confirmation - but please check when ordering as lead time will vary. If you have chosen a RAL colour then this will typically increase the lead time to 6 weeks, blinds will be up to 6 weeks

Where do you deliver and fit?

Our standard delivery and fit areas are shown on our Supply, Fit & Delivery page.

Do you have the sight lines showing the distance between each pane of glass?

The meeting point profile of a Smarts Durafold 1000 is 132mm, Beaufort Continental 142mm, Emperor Concealed Hinge 135mm and Smarts Durafold New Slimline 108mm.

If I buy a 6 panel bi-fold door can I choose which side to have the master door installed?

Yes you do have the choice of which side the master door will be positioned, you will just need to let us know when you come to order the door.

Why should I choose Complete Bi-folds UK over any other Company offering similar products?

There are many reasons why customers should choose Complete Bi-folds UK over its competitors and here are just a few:

  • We were incorporated as a Limited Company in England on the 14th January 1985.
  • We have unlimited experience in this field. Our fitting teams have many years' experience in both Aluminium and UPVC products. Just take a look at our CPA Report and Testimonials from our extremely happy customers.
  • For supply and fit customers we offer full FENSA certification (our FENSA reg. no. is 15706) along with a 10 year written guarantee covered by an Insurance backed guarantee issued by the CPA (Consumer Protection Association, our reg. no. is 1980).
  • Also should you be considering having other products fitted, Complete Bi-folds UK offers an array of Aluminium and UPVC windows and doors, Soffits and Fascias, Patio Doors, Sliding Windows etc.

In other words we are truly a one stop shop for all of your needs.

Please call us on 01268 571055 if you need any information regarding the range of products we offer. Our friendly staff will be only too happy to help you with any questions that you may have regarding our company and its products.

URL call today to visit our

(Canvey Island, Essex)
01268 571055

Renovation and Home Design