How long has the business been running?

The business was founded in 2005 and we have been consistently growing and developing our sliding door ever since.

What is the ordering process with Ultraline?

  • Send your sizes/drawings through to us to receive a formal quote
  • Visit one of our showrooms to see the products in person if required
  • Survey takes place only once openings are fully formed with steel in place and finished floor level¬†known, with the base of the opening ready to measure 85mm lower than FFL (Finished Floor Level – not screed level)
  • At survey we will leave the electronic switches with you on site for you to have wired up by your electrician before door installation
  • After survey, pay a 50% deposit to go into manufacture, payable either by BACS or by debit/credit card
  • Receive installation date from us
  • Just before installation, pay a 40% payment, leaving 10% payable after installation
  • Installation takes place

How much of the UK do you cover for installation?

The area we cover for installation can be found on the contact page of our website.

How long is the warranty?

The doors come with a 10 year product warranty which covers;

  • Aluminium frame against discolouring, warping or failing in any way
  • Double glazed units from breaking down and steaming up
  • All parts including rollers, gaskets and electric locking switch
  • Any installation-related issues

Can I buy the doors on a supply only basis?

Unfortunately we do not offer our product on a supply-only basis. The survey and the installation is simply too important to get wrong. So we insist on one of our in-house installation teams doing the job, often using one of our Oscar 600 offroad robots to ensure everything is efficiently and safely installed.

Do you come to survey my project?

Yes. Whilst it is possible to order off plan drawings if ordered early enough, we always recommend having us survey the project as it means you are not fully responsible for the sizes and vastly reduces the likelihood of any errors. It is also essential that we assess the access on site.

We are always working on shortening our lead time to ensure the build doesn’t come to a standstill while you are waiting for the glazing to be installed.

The survey is also particularly important for ensuring that we achieve a flush floor level where the finished floor level on the inside and/or the outside is flush.

Are the doors custom made for my aperture?

Yes everything is made to measure. There are no ‘stock sizes’ with our doors. We always survey before manufacture to ensure no mistakes are made and flush floor levels are achieved.

How large can you make the doors?

The maximum size per panel is 4.2m wide and 3.2m high as long as you don’t exceed 9 sqm per panel.

How long is the lead time and how long does the installation take?

From signed off survey drawings and deposit payment, our lead time is 6-10 weeks.

As an estimate, 3-4 sets of sliding doors can be installed per day on site.

What colours do the doors come in?

We only offer 4 colours.

  • Brushed Platinum (Anodised)
  • RAL7016 Matt Anthracite Grey (PPC)
  • RAL7021 Matt Black Grey (PPC)
  • RAL9005 Matt Jet Black (PPC)

All colours are all marine-grade to 60 microns as standard.

All polyester powder coated colours are Matt at 30% gloss level.

Firstly and most importantly, by only offering 4 colours, we are able to stock profile in all 4 colours, which means we don’t order materials order by order and we are not at risk of powder coaters or any other supply chain issue causing us and our clients delays.

Secondly, even when we offered a larger colour range, we found that our customers were consistently choosing from a small handful of colours anyway and we have found it is a much less overwhelming customer experience to only have 4 colours to choose from.

Can I have pocket sliding doors or floating corner doors?

Yes, our system is highly versatile and can be configured as cavity pocket doors as well as floating corner (or sliding corner) doors.

With our system pocket doors are a cost-effective way to achieve the architectural ‘wow’ factor.

For floating corners configurations you can even have irregular tracks meeting one another at the corner. For example, you can have a triple track sliding door meeting a single track door at the floating corner.

How thin is the frame? What is the sightline?

Our central interlock sightline is 20mm and the outer frames at sides and head are all 50mm.

However, we have designed our door so that using our standard detail of a flush floor level and concealing the 40mm of the outer frames at the sides and head with render/cladding, you will actually only see a 20mm frame all the way around the door. This means that you can achieve a perfect visual symmetry.

How does the lock work and is it compliant with PAS24, Secured By Design and/or Document Q?

The lock is a stainless steel solenoid bolt operated by a Niko Home Control switch. Technical details of the lock and wiring instruction are available on request. They are very simple to wire in (much like a light switch) and can be easily integrated into a smart home system.

The lock ‘fails secure’ in the case of a power cut and it has a manual override pull cord in the case of a fire.

The robustness and strength of the locking system is how the doors, as standard, were able to achieve PAS24:2016 and Secured By Design.

This locking mechanism is also key for us achieving the 20mm sightline all around and is how it has no visible handle.

Document Q is part of building regulations and specifies that certain items within new builds must have laminated glass for additional security. We can supply our doors with laminated glass as required.

What is the u-value and what different glass spec options are there?

Our standard double glazed units are high performance low-e coated, argon-filled units with black warm edge composite spacer bars. All of our units are made with toughened safety glass.

We offer solar control glass as a more expensive alternative option.

The overall u-value for both standard and solar options is 1.22.

The differences between the standard and solar specifications can be found in our brochure, available to download on this website.

We do not offer triple glazing. We used to offer it, but our customers found that the minor thermal advantage over double glazing was not worth the extra cost and weight it added.

How thick are the glass units and the individual panes?

All of our glazed units come in a total thickness of 36mm. The standard is 28mm so by using a thicker glazed unit, it means that on the larger door sets, we don’t risk the glass panes bowing and touching in the middle. It also aids our thermal performance.

The glazed units are comprised of 2 panes of glass both at least 6mm and can be up to 10mm depending on the overall sqm of the glazed unit.

Can I have trickle vents in the doors?

No, unfortunately, we do not offer trickle vents. This is in line with our mission of making the most visually appealing slimline sliding door on the market.

Alternatives you can implement instead include:

  • Other means of ventilating the room via another trickle vented window or opening skylight/Velux
  • Air bricks
  • Air source heat pump or MVHR system

However, our doors do allow you to lock the door in a semi-open position of 100mm, giving some ventilation into the room without compromising on security.