We're just processing your enquiry...

Bi-Folding Doors

Planning for Bi-Folds

If you’re planning to update your home to accommodate a new set of bi-folding doors then the following guidance should help.

Changing or adding doors to your home is usually considered a permitted development so you should not need to seek planning permission. However, in rare instances such as being in a conservation area it might be worth checking with the local authority first. Having established that you don’t need planning permission the following process should help you guide you through.

Replacement doors

  • If you’re replacing an old set of patio doors in an existing aperture where the width and height is not going to change you must ensure that the lintels over the opening are adequate, a competent builder should be able to establish this by inspection.
  • If you’re planning to remove a set of doors and increase the size of an opening which involves making a structural alteration you may well need to comply with building regulation. This can be simply achieved by submitting a building notice to your local authority building control department. You may also require the services of a structural engineer.
  • Viva’s bi-folding doors distribute the majority of the weight of the doors downward, they are not top hung.
  • If you’re going to the trouble of replacing your doors it is worth spending a little time working out how the new doors will work in with your existing floor levels. Rather than sit the door track onto the existing floor you can alter the height of the external brickwork so that the top of the track sits pretty much flush with the floor.
  • See the following replacing patio doors guide for all the options available. Here’s a small set of bifolds we did recently in black.

New Build

With the luxury of a new build you can plan your doors exactly how you want them. Here’s some things to consider:

  • It is normal to leave the finish and decoration until the doors are installed. Viva recommend that you plaster up to the frame after it is fitted and sealed. Flooring is usually laid after installation and butted up to the lower track. Our measuring up guide shows the door track dimensions.
  • Bi-folding doors can open either inward or outward. The most popular choice is to opt for the doors that open outward where the doors do not impede on your internal space.
  • You might opt for one large set of bi-folding doors running the complete length. Installing a large beam can often prove expensive an impractical and in this instance you could choose to go for several sets in one wall as the above example shows. Alternatively two sets of bi-folding doors on a corner might work as in this example.
  • Viva offer a low threshold alternative for those looking to match the ground level outside with your internal floor level. In this instance the installation of an aco drain is essential. This modern barn extension has an acodrain installed. In every instant it is recommended that the floor level slopes away from the doors. Naturally our advice would always be to opt for Viva’s weather rated cill.

Other things worth knowing:

  • The maximum height of Viva’s bifolding doors is 2600mm.
  • Lead time from confirmation of aperture size to order is usually around 3 weeks.
  • We’re open 9 til 5 every weekday so feel free to call us on 0161 342 8298. Alternatively there is a contact form, we are here to help.
Call Today

0161 342 8298

SaleIf you would like to discuss your quotation or project further please call us on 0161 342 8298

Folding Door Hinges

There are four extra strong aluminium black hinges affixed to each door with stainless steel screws ensuring that the doors do not sag and that when to be opened or closed only the lightest touch is needed.

Design & Price Now

Safe & Secure

Not only is our lock of the highest specification and if forced are fail safe, they are also suited to allow a single key to open any door. On intermediate doors shoot bolts operated by the flush handles disable any attempt to lift the doors off the track whilst the master door has a 5 point locking system comprising of a combination of mortice, hook and mushroom locks for complete peace of mind.

Design & Price Now


The tracks are slim sections, each with a thermal break designed to keep your home snug. They are only 20mm deep but they have an added upstand of 30mm that keeps out driven rain and prevents water damage to your internal floors.

Design & Price Now

Stylish Handles

These slim and elegant modern handles and lock plates which are provided both inside and outside the master door, these are in satin black as standard but are also available in satin white or chrome upon request. The cylinder locks are suited for greater convenience.

Design & Price Now

Fold-flat D Handle

An inconspicuous black handle located which folds back against the frame assists with opening and closing the doors.

Design & Price Now

Engineered runner (bottom)

The runner at the base which carries the downward loading of the doors is engineered with stainless steel wheels to operate smoothly against the steel base rail insert ensuring long life and security.

Design & Price Now

Engineered runner (top)

The engineered runner at the head of the doors ensures that the doors are also smooth running and also adds to the security preventing the doors from being lifted from their frames.

Design & Price Now

Fresh air ventilation

In modern air tight homes we are required to offer trickle ventilation to all our doors. These vents may be closed to keep out the very worst of the weather but normally allow fresh air into your home in a controlled manner, helping to keep you healthy.

Design & Price Now

Slim sight lines

Designed to reach the highest thermal standards the door frames are not only strong and super functional but also slim and elegant. Where your doors meet the two frames together with the hinge mounts and gasketry designed to keep out inclement weather are a total of 131mm wide and amongst the slimmest on the market.

Design & Price Now

Flat handles

Flat handles located on the inside face of the folding doors operate shoot bolts into the top rail and bottom runner for extra security.

Design & Price Now

Double glazing - top specification

Our standard but highly specified glazed units are filled with argon gas to prevent condensation and keep out the cold. Each Low-e unit has a warm edge spacer for added insulation and is toughened safety glass as standard. If you require a specialized type of glass we are here to help and recommend.

Design & Price Now