The Buyers Guide to Sliding Doors

Your questions answered

sliding patio doors with extensive distant view
sliding patio doors with extensive distant view

2. Bi-Fold or Sliding Patio Doors?

Bi-fold doors have the advantage that they can fully open up for almost the entire aperture.

The idea of opening up the whole space on a hot sunny day can be tremendously appealing.

Read our Buyers Guide to Bi Fold Doors

Comparing bi-fold doors with sliding doors

Bi Fold Doors open up about 90% of the aperture

listed building replacement windows
listed building replacement windows

Aluspace is a new internal glazing system for glass wall doors and room dividers including internal sliding doors.

Read more about internal glazing.

listed building replacement windows

For period style properties heritage bi-fold doors can be the preferred option

Read our Buyers Guide to Bi Fold Doors

SIPS low threshold visoglide plus triple track sliding patio doors installed in North Yorkshire

Marlin recommend standard slide or lift & slide doors for easy trouble free open and close operation and controlled ventilation.

Marlin manufacture the popular and proven
Visoglide Plus Sliding patio door system
available in two, three or four panel configurations on either a double or triple track.

Rated 5.0 out of 5 Matthew Corcoran

had a large 3 pane sliding door and side glazing unit supplied and fitted by Marlin Windows... we were really impressed with the products on offer and the advice provided... delighted with the end result. The service provided throughout was first class, they went above and beyond to help us.


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very large sliding patio doors

5. What are the maximum dimensions?

Designs and configuration should always be within the safe limits of the sliding door system which is governed by width, height and weight.

As a general guide the maximum sliding patio door width is 6 metres with a maximum panel width of 3 metres and a height of 2.5 metres.

Expansive walls of glass are attainable however, the overall width of the doors should not exceed 6m.

For advice and guidance on achieving the best most pleasing design and configuration based on system limits
call an expert on 01535 603909 or

contact us here

flush threshold sliding patio doors

6. Accessibility

Low threshold options allow us to create the appearance of a seamless transition between the inside and out.

The continuous connection is achieved with a step free low threshold that delivers a fully accessible patio to enjoy.

See our guide to
low and flush threshold aluminium sliding doors.
or contact us for further advice.

Rated 5.0 out of 5 Noel Brown

Marlin have just completed the installation of a series of sliding doors. We are delighted with the finished product. All our other professional contractors on site have commented how impressed they are with the Marlin product quality & finish.

We have no hesitation in recommending Marlin & can only thank them again for their superb service.


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colour charts for glazing

7. What colours are available?

Powder coating means a huge range of colours and textures are available including stunning anodised finishes and textured paint.

We can mix it up by choosing a different colour on the inside to out.

View the extensive range of RAL colours along with two ranges of textured paint finishes here.

Like to see a textured finish colour sample?
Just contact us and we'll be glad to post this out to you.

sliding patio doors with built in blinds and sun protection glass

Practical sun protection provided by Sunguard SN 70/35 (formally 70/37) glazing and built in blinds

thermally efficient glazing

9. Will I be warm in winter?

Look for glazing with a U value of 1.8W/m²K or lower.

This ensures glazing exceeds the minimum thermal requirement for Building Regulations and as such will be an efficient insulator against adverse weather.

Rated 5.0 out of 5 Caroline Dyson

Excellent customer service from enquiry to delivery . Thank you to Hannah ,Adrian and the team for going the "extra mile".


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sliding patio doors installed at energy efficient SIPS house

Sliding Patio doors installed at
energy efficient SIPS House in Yorkshire

10. Can they be used in low energy buildings?

Yes. This energy efficient SIPS (structured Insulated Panel) House is one example.

secure by design sliding patio door locks

At Marlin all door locking systems are fully protected as standard with the tried and tested Police recommended Avocet ABS euro cylinder to keep you and your property safe.

11. Will I be secure?

Ensure your doors include a protected locking system, such as the Avocet Break Secure (ABS) lock, which incorporates the latest technology, is incredibly secure and which burglars can't get past.

Look for the 'Secure By Design' logo.

building with multiple sliding patio doors

Marlin's Qualicoat standard powder coated paint finish is guaranteed for a full 25 years.

visoglide plus sliding patio doors

13. What system should we choose?

Visoglide Plus is the most popular and recommended external sliding door system.

It is strong, smooth and adaptable with excellent thermal and weather resistant properties.

And has made the 'Wow what a view!' moment possible for many home owners.

Aluspace is a new internal glazing system for glass wall doors and room dividers including sliding partition doors.

quality sliding doors
from Marlin Windows

Rated 5.0 out of 5 David Lister

Top rated! Efficient and excellent work. Very friendly with skilled fitters. Would highly recommend.


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14. Featured Sliding Door Projects:


Rated 5.0 out of 5 Krystyna Mcmanus

Recently had large sliding doors fitted. Excellent customer service right from the initial visit to Marlin. Hannah was brilliant and so helpful.
Project was finished to a high standard and the fitters were first class and very professional. Would definitely recommend this company.


Read this and our other 5 star reviews left on Google


Integral Blinds For Sliding Doors

built in integral blinds for sliding patio doors

All sliding doors can be fitted with built in integral blinds

Aluminium Sliding Patio Doors

aluminium sliding patio doors

Read more about Sliding Patio Doors from Marlin

How To Guide To Low & Flush Thresholds

guide to how to get low & flush easy wheelchair access thresholds

Read our guide to achieving a fabulous seemless appearance of a flush threshold

Technical advisors are on hand at the aluminium window and door showroom in Keighley in West Yorkshire

15. Where Can I Get Further Advice?

Our high quality window and door products are backed by the same high quality customer service. Technical advisors are just a phone call away to answer all your questions no matter how technical.

Typical help provided includes:

  • Choosing the right product
  • Getting the right made to measure size
  • Help with ordering
  • Threshold advice

We provide a FREE sample service to assist with surveying decisions, design considerations, or planning applications – just pick up the phone and ask.

Click To Call


Why Choose Marlin Windows?

We care...

about the quality of finish
about you, your project and your property
about your 100% satisfaction

And we are rated ★★★★★ on Google

need more reasons? click here

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"our builder said they were the best supplier and fitter they had ever used"
Mrs Nellist Haworth, Yorkshire


Call 01535 603909