Low & Flush Thresholds For Aluminium Bi fold and Sliding Doors

Your detailed guide to getting the fabulous seamless appearance of a flush threshold.

flush threshold sliding patio door

3 key steps

  1. Plan as early as the concept stage
  2. Know the door system threshold profile
  3. Know the final internal floor finish level and external level

3 WAYS THAT MARLIN HELP YOU

Low and flush thresholds technical advisor at showroom in Keighley in West Yorkshire

1. Early Planning with Experts

Marlin experts liaise with you at the concept and early planning stages so that every detail is accounted for to make sure that everything is fully considered and nothing is overlooked.

image of free sliding door profile sample to help with precise planning

2. FREE DOOR PROFILE SAMPLES

Marlin provides a free sample of the door system threshold profile for your planner and builder to work from.
By using the sample you will know exactly how to set the masonry at the correct height to support the threshold and achieve a low or flush appearance.

There’s nothing quite like having the actual threshold profile to work with.

The aluminium window and door showroom in Keighley in West Yorkshire

3. SHOWROOM DEMONSTRATIONS

Visit the Marlin showroom to see a demonstration of all the elements required to achieve a low or flush threshold - you will see exactly how to prepare for the very best outcome.

 

BOOK A SHOWROOM APPOINTMENT

Call 01535 603909

or

BOOK HERE

 

Booking ensures we are on hand to answer even the most technical of questions

 

 

On TV

 

Accessible Low & Flush Thresholds - Wheelchair & Disabled Access

Our low profile superslim frame low threshold bi-fold doors featured on Love Your Home & Garden With Alan Titchmarsh (Swindon episode)
broadcast on ITV on January 15th 2019

Watch the programme highlights in less than 2 minutes below

 

"it's like a dream home" says homeowner Nina

"So easy to open" says Alan

"so slim and so elegant, barely any step we're talking millimetres" says architect Ewald Van Der Straeten

 

Nobody makes it easier to get a seamless threshold than Marlin.

Free profile sample with every order.

 

KNOW YOUR LEVELS

In order to achieve the desired threshold height it is vital to understand what the final levels will be on both sides of the door. The final floor finish level will dictate the masonry height on the external leaf of the building that is supporting the door.

 

 

 

Supply only customers

Just pick up the phone and chat to us if you require assistance

Call 01535 603909

 

 

BOOK A SHOWROOM APPOINTMENT

Call 01535 603909

or

BOOK HERE
External view of flush threshold sliding patio doors

 

 

 

 

Rated 5.0 out of 5 Helen Nellis

Would highly recommend Marlin windows. Installed bifold doors with meticulous planning and precision. Had a tour of the showroom and assisted through the purchase and installation process ensuring perfect fit of clearly an excellent aluminium product. Can’t recommend enough! Have recommended to others and our builder said they were the best supplier and fitter they had ever used.

 

Read this and other Reviews of Marlin Windows left on Google

 

 

Visit The Marlin Showroom

Please visit our showroom in Keighley, West Yorkshire for a full demonstration of a bi fold or sliding door that has been correctly installed into a low or flush threshold environment.

Our knowledgeable and friendly team of experts will explain everything you need to know in order to achieve the very best design, function and installation results.

 

BOOK A SHOWROOM APPOINTMENT

Call 01535 603909

or

BOOK HERE

 

 

Marlin have years of manufacturing and installation experience and are here to share this with you.

As soon as you have a concept please get in touch to discuss your project – we will guide you through the entire process, help you to avoid all of the common mistakes and ensure you achieve the best possible results.

If like us you want to achieve the seamless appearance of a low or flush door threshold then leave nothing to chance.
Talk to Marlin now! Call 01535 603909 or click here.

 

Allowing for clearance

Open In Bi-fold Doors

As explained above, a small threshold upstand is advised to accommodate small level inaccuracies but is also vital for open in bi fold doors to ensure that the panels will fully open.

 

Looking out on an open in bifold door low threshold

Looking out on an open in bifold door low threshold

Looking in on an open in bifold door low threshold

Looking in on an open in bifold door low threshold

Looking out on an open in bifold door low threshold with cill

Looking out on an open in bifold door low threshold with cill

Looking in on an open in bifold door low threshold with cill

Looking in on an open in bifold door low threshold with cill

 

This is very important for a number of operational reasons:

  • To accommodate for minor level inaccuracies
  • Prevent panels from binding on surface bumps
  • Ensures unhindered, smooth and effortless operation
  • Avoids dislodging panel sealing gaskets

 

The best way to ensure a fabulous seemless threshold is to talk to us.

The sooner the better.

Call 01535 603909 Today.

Open Out Bi-fold Doors

Allowing clearance under the panels is not usually necessary since most external levels finish lower than the drainage outlet on the outside face of the threshold.

 

Looking out on an open out bifold door low threshold

Looking out on open out bifold door low threshold

Looking in on an open out bifold door low threshold

Looking in on an open out bifold door low threshold

Looking out on an open out bifold door low threshold with cill

Looking out on an open out bifold door low threshold with cill

Looking in on an open out bifold door low threshold with cill

Looking in on an open out bifold door low threshold with cill

 

 

However, when using a rebated threshold some design requirements indicate a minimum step between inside and outside. To achieve this, the external finish would then approach the threshold above the drainage outlet and so for this detail the same panel clearance rule will apply as for open in bi fold doors.

The Buyers Guide To Bi-Fold Doors

guide to how to buy bi-fold doors

Read our guide to buying bi-folding doors for your home

Integral Blinds For Bi-Fold Doors

built in integral blinds for bi-fold doors

All bi-fold doors can be fitted with built in integral blinds

The Buyers Guide To Sliding Patio Doors

guide to how to buy aluminium sliding patio doors

Read our guide to buying sliding patio doors for your home

Integral Blinds For Sliding Doors

built in integral blinds for sliding patio doors

All sliding doors can be fitted with built in integral blinds

Allowing for drainage

 

The door framework is designed to drain water. It is vital that the drainage holes on the outside face of the threshold are not blocked by masonry, steps, paving flags or decking etc.

For materials that are close to or touching the threshold above the drainage outlet on an installation at ground level, make sure that adequate land drainage is in place. This can be a simple channel filled with a coarse aggregate or an ACO type drain - installed with careful planning this can be discretely hidden under external finishes.

For an installation onto a balcony area, make sure that an adequate drainage system is in place under any external materials that are close to or touching the threshold above the drainage outlet.

 

 

flush threshold sliding Door Drainage Open In

Sliding Door Drainage Open In

flush threshold sliding Door Drainage Open Out

Sliding Door Drainage Open Out

flush threshold sliding Door Drainage Cill Open In

Sliding Door Drainage Cill Open In

flush threshold sliding Door Drainage Cill Open Out

Sliding Door Drainage Cill Open Out

 

checking the levels ready for flush threshold patio doors

SAMPLES

Marlin provides threshold profile samples to help with construction details and surveying decisions.

This is a free service for all orders and can be invaluable in helping to clearly understand the relationship between the masonry that supports the threshold and the final floor finish.

installing flush threshold patio doors

WHAT THE BUILDER NEEDS TO KNOW

At the start of the project the builder needs to know the following important information:

The door system and design
Panel opening configuration
Threshold design
The target height for the threshold

new build SIPS house with flush fitting patio doors

NEW BUILDS

The builder will create the new opening and lay masonry to support the threshold. The height and level accuracy of the masonry will dictate the height of the threshold in relation to the final floor finish.

With the final floor finish known and the threshold profile sample on site you can be confident in achieving the required threshold detail.

EXISTING BUILDS

It is possible that the existing floor structure will need to be modified in order to accommodate the depth of the threshold profile.

This is usually the case for deep three and four track sliding door frames but can apply to other frames depending on the desired position of the frame within the building fabric.

 

Would you like a free quote for low/flush threshold doors?

Call 01535 603909

or

Contact Marlin Windows Today

 

 

Rated 5.0 out of 5 Tony Bedford

Had all our windows replaced with aluminum including 2 sets of bi-folds. It took a number of visits to the factory to meet with Adrian and Hannah who were both very patient and helped us choose the correct lay out and colour. Very pleased with the result... Highly recommended.

 

Read this and other Reviews of Marlin Windows left on Google
aluminium bi-fold and sliding patio door showroom in Keighley in West Yorkshire

 

 

 

BOOK A SHOWROOM APPOINTMENT

Call 01535 603909

or

BOOK HERE
The team of fabricators, fitters and staff at Marlin Windows in Keighley West Yorkshire

 

 

 

Get a free quote for low/flush threshold doors?

Call 01535 603909

or

Contact Marlin Windows Today