Smart Visoglide 4 Pane Sliding Door In Grey (Matt) - (4000mm x 2000mm)

A sliding door is a large, heavy item with a lot of moving parts, and we would only recommend they are fitted by a qualified tradesman.

Please consult our installation guides for more information.

If installed correctly, an aluminium sliding door will require little to no maintenance. Almost all of the issues reported with bi-folds are down to improper installation, so please exercise caution!

Yes, a sliding patio door is a very secure product due to the multipoint locking systems anyway. If your door is in a vulnerable area or you are concerned, we can offer a laminated security glass upgrade. Laminated glass does not smash like a normal pane of glass, and will remain in place even if attacked (much like a car windscreen).

Yes, we can offer marine-grade upgrades for customers who live within 10 miles of the coast.

Deciding which threshold and sill combination you have on your sliding door is perhaps the most important decision. If the wrong threshold is selected, you could have issues with floor levels and the door opening clearance.

There are various thresholds to choose from, and we recommend consulting the help icon on the online designer for a detailed explanation of each. Alternatively, you can view our threshold guides here.

An important consideration with sliding doors is also the depth of the outer frame, which is much thicker than a standard door or window. Please consult our technical guide before ordering, to ensure you have allowed for the frame depth.

You will need to work with your architect and planning officer to clarify if trickle vents have to be included. There are so many aspects of a build that can affect the airflow (air bricks, existing doors, extractor fans etc.) that it is impossible for us to determine this.

Planning permission is not typically required for replacement windows or doors, providing you are not making any alterations to the original aperture.

For windows going into a new build or extension, planning permission will depend on the size and nature of the build itself. Therefore, this is a question that you should check at the build planning stage with your local council or building authority.

For refurbishment projects in a property you own, you will not need any building control or authority sign off providing you are replacing the current doors with an improved or like-for-like product.

For new builds and extensions, the products will need building regulations consent and must meet the current UK building regulations. Further accreditations such as document Q, PAS24 and Police Approved may not be essential, but check that your architect or authority has not specified this.

We only use industry-leading brands for our products, which is especially important when considering sliding doors as they can vary greatly in quality. We proudly display every brand we supply, and any research into these brands will confirm they are of impeccable quality.

Lesser quality sliding doors can be cumbersome to use, as this is a heavy item with a lot of moving and operational parts. A sliding door is also a costly item, so it's essential to choose a tried and tested product that won't give you any headaches down the line. Be wary of any company that does not offer full disclosure on the manufacturer they use.

Below are the different glass options explained, along with when they might be suitable:

Double glazed - the standard glass option, two sheets of 4mm glass with a 20mm thermal spacer bar in between. Suitable for the vast majority of applications and the most cost effective.

Triple glazed - these units have another sheet of 4mm glass sealed within the unit, which makes for a slightly improved energy rating and also improved noise reduction from the outside. Suitable for customers wanting the best energy rating possible or if external noise is a factor.

Laminated - this high-security glass holds together when shattered, making it more secure than standard glazing. Laminated glass is generally recommended on larger panes of glass or in vulnerable areas where security may be a concern. Suitable for doors in vulnerable areas or extensions that require either part Q or Police Approved accreditation.

Integral blinds - glass units with magnetic integral blinds inside the glass, operated by a slider along the edge of the glass. These units are suitable for customers who require privacy but do not want to retrofit other blinds or curtains around the doors.

Stock colours are Anthracite Grey, Black and White on both bi-fold systems. We can also offer any colour from the RAL colour chart.

Up to three panes on a triple track option.

Yes, we offer a variety of magnetic integral blind options that can be either slider operated, remote control operated and even solar operated. Click here to learn more.

Sliding doors do just that - traditionally on a two-pane configuration one pane will slide open along the track, whilst the other remains fixed. You can select from a number of different design configurations based on the width of your brick opening, and we can even offer triple track options so more than one pane slides open.

There are essentially two types of sliding door - an "inline" and a "lift and slide".

Both our Smart and Cortizo aluminium doors are inline, meaning the moving door sits on rollers on the track and glides across them while opening. This is the most conventional way that sliders work, and generally, the heavier the door the more force is needed to slide it open.

Our Reynaers aluminium sliding doors are lift and slide patio doors, which make use of the handle to slide open. By turning the handle 180 degrees, the moving door raises up a few millimetres onto the rollers, reducing the friction and making the door open even easier. This clever mechanism makes the operation appear effortless, even on a very large and heavy door. It is for this reason if you are considering a large sliding door with big glass areas, a lift and slide may be more suitable.

Another benefit of lift and slide doors is that they are lockable in the open position, for example, if you want some extra ventilation on a warm day. Inline sliding doors cannot be locked in the open position.