UPVC Bifold Doors
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About this range & buying advice
UPVC Bifold Patio Doors - Connect To the Outside
We have manufactured UPVC products for over 25 years and are based in Bristol today, we deliver Nationwide, and we export many of our bespoke products worldwide. We are confident you will find our doors to be high-quality and affordable. If you need help, please do call us.
Imagine opening up an entire wall of your room, creating space and letting fresh air and natural daylight flood into your home, connecting your living space with your garden in summer. Let you do just that.
Folding Doors Connect Your Living Room To Your Patio or Decking.
Whether you have a rear living room or you are building an extension with a dining kitchen, a conservatory or an orangery, ModLok doors can provide a door that opens further than a patio or standard French doors. Liniar has manufactured the first fully bespoke bi-folds to be designed, engineered and made in the UK – and we believe they are still the best.
Folding Door Colours
36 Ral Colour combinations with possible dual colours inside and out, and new colours always arrive.
Opening Options - Available in a wide choice of opening configurations
Safety features - include the innovative low threshold option for family-friendly and wheelchair use. What's more, this system combines the best security features on the market – bringing you a modern space-saving solution for your home that will give it the 'wow' factor.
Better for the environment
One of the most effective ways to save energy within your home is by installing energy-efficient windows, doors, and roofs.
Liniar frames outperform most of the other leading brands in the UK regarding thermal efficiency – mainly due to our innovative uPVC multi-chambered profile design.
The thermal efficiency of a door is measured in U-values, which demonstrate how effective the door is at preventing the transfer of heat into and out of a building. The bi-folding doors offer high energy efficiency.
The lower the U-value, the higher the doors' effectiveness at keeping the heat inside your home when it's cold outside.
The standard Liniar door range can achieve a U-value of 1.3 W/m2K when fitted with cost-effective double-glazed units, which means you'll enjoy a warmer and quieter home and lower energy bills.
And for even greater thermal efficiency, the Liniar ModLok bi-folding range can be fitted with triple glazing, reaching an impressive U-value of 1.0 W/m2K

These doors are becoming more popular than ever, thanks partly to their regular appearance in television home make-over and lifestyle programmes.
Timber or aluminium are often perceived as the only materials that can be used, but doors made from lead-free PVCu can offer many more benefits:
• Smoother operation
• Higher thermal efficiency
• Lower maintenance
• Can perfectly match your other doors and windows
Liniar's foiled woodgrain-effect options can have the appearance of timber without the need to repaint them each year.

If you choose our flat grey frames, your doors will rival the most contemporary aluminium range on the market, keeping your home much warmer at a more cost-effective price. And Liniar's 'top of the range' ModLok™ offers even greater strength and rigidity, combining all of the structural benefits of an aluminium door set with the energy efficiency of PVCu.
Discover why more and more people are choosing Liniar's ModLok to add an extra dimension to their homes.

Your Home. Your Choice.
Our range offers complete flexibility, whatever the room or the size of the opening you need.
Manufactured in decorative sculptured profile, 36 colour combinations are possible, and the range of colours is still growing. With options from two to seven panes, all with our beautiful, super-slim sightlines, you can also choose how many doors fold back to each side of the frame.
The Liniar standard door range is available in a wide range of configurations, whilst the Liniar ModLok™ bi-folding range offers an even more significant number due to its additional strength and rigidity (see full table opposite).
A brand new concept in locking technology, ModLok™, has been developed by Liniar to enable even wider door configurations.
Combining aluminium reinforcing within the UPVC frame with a high-security locking mechanism, the Liniar ModLok™ bi-fold offers all the structural benefits of an aluminium door set combined with the thermal benefits of PVCu – bringing you the best of both worlds.

Designed for living.
Our concertina doors are crammed full of innovative design features.
Low maintenance
You can rest assured that you won't need to spend hours looking after them to maintain their beauty.
Our 10-year frame guarantee gives you the peace of mind that the colours won't fade – and not only that, you won't need to treat or paint them each year to keep them in tip-top condition. Just an occasional wipe-down with soapy water is all they need to keep them looking their best.
Liniar bi-fold Doors are Family-friendly.
The Registered Design protected Liniar low-threshold option creates a seamless entrance and exit, making it ideal for family homes. An optional tray to seat the low threshold creates an easy-access ramp for wheelchairs and prams.
Ultra-low, the Liniar threshold measures just 24mm at its highest point, with a silver or gold finish available to perfectly complement the door hardware.
Strong and secure
The shoot bolt locking mechanism design ensures the door is bolted firmly into the stainless steel track, maximising your security. Built-in anti-lift features, anti-bump cylinders, and optional anti-snap cylinders combine to bring you peace of mind.

ModLok™ is a highly innovative combined reinforcing and locking mechanism, bringing additional strength and rigidity to the doors and enabling you to have even wider configurations of bi-folding doors. ModLok™ also offers enhanced security features, including three opposing hooks and two shoot bolts built into every master door, plus two anti-lift shoot bolts on every slave door.
The Liniar ModLok™ bi-fold offers all the structural benefits of an aluminium door set combined with the thermal benefits of uPVC.
Innovation
Mod Lok bi-fold doors won the Queen's Award for Enterprise
Added slim hinges with the fixings hidden inside, maintaining the sleek lines and enhancing security as they can't be unscrewed from the outside.
Purpose-designed folding keys to avoid any problems with keys being left in the locks during operation – it's often the small things that make a huge difference.
Need help? We are a leading door supplier in Bristol Telephone need a bi-fold Bristol 0117 971 99 22. We manufacture PVC and aluminium powder-coated and UPVC doors.
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