InternaFold Door Systems

Our range of internal bi folding door systems
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Product Overview

Introducing our new InternaFold range of bi folding and sliding doors. Suitable for all interior applications, the light weight running gear is the same quality as our external weatherfold system but designed to be more discreet and elegant.

Still capable of carrying doors of up to 75kg making this system suitable for residential and light commercial purposes. Each panel can be 3.3m high and 1m wide with a maximum of 8 panels folding each way depending on the specific track system used for your situation. Some systems require a bottom running guide which can be inset into the floor for a flush finish.

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CustomFold Range

Discover Our Bespoke Bi Folding Door Systems

StockFold Range

Discover Our Stock Size Door Systems

InternaFold Range

Explore our internal bi folding door range

Door Systems

Maximum Height in Meters

Maximum Width in Meters

Max Panel Width in Meters

Product Features

We offer a vast range of internal systems to offer you the best option for your project.

Our bi folding range consists of 10 systems to cover every aspect of internal bi folding projects, whether it be a wardrobe or a full internal screen system.

Our sliding range consists of straight sliding panels with several styles of hardware to suit any property. This includes standard sliding panels to zero clearance glass panels.

Please see brochures for more details.

Integrated Blind IGU’s

The Only True Solution For Bi Folding Doors & Windows!
Our Pleated & Venetian integral blinds ensure the insulating properties of the double glazing unit are maintained, while providing protection from dirt and weather conditions. The blind mechanism is totally encapsulated within the unit so here is no added risk of the unit breaking down.

Glass Options

Single, Double & Triple glazing options available to suit all applications. Featuring Low e coated glass and Argon or Krypton gas to offer the best insulating properties possible. Safety toughened or laminated also available and standard on all door systems to meet building regulations.

Integrated Pleated Fly Screen

The 612 Retractable Pleated Insect Screen offers a screening solution all our door applications due to its innovative design. Developed by Brio for flexibility and tested vigorously for durability, the 612 Screen is a popular product worldwide. With our climate ever changing, the fly screen is becoming more and more popular in the UK.

Self Draining Aluminium Sill

All our External Bi Folding Door Systems utilise our self draining aluminium sill.

The 93HS Self Draining Sill is the perfect complement to our exterior folding door systems. It has been designed to integrate seamlessly with Brio Weatherfold 4s exterior folding door hardware. The aluminium tread makes it ideally suited to high traffic areas and high moisture environments. Mechanically fastened aluminium end caps feature a closed cell foam gasket to prevent water leakage. Water drains from the channel through predrilled drainage holes at the front of the sill.

Calculated U Values

The U-value assesses the rate of heat loss / gain through all the thicknesses of the combined elements that make up a building component such as a window, door, roof etc. It is a way of measuring the insulating properties of the building element. The lower the U-value, the better insulated the building element is. So a window with a low U-value should prevent heat loss / gain better than a window with a high U-value. We can provide U Value Certificates with all our door and window systems if you require them. Read more for further information and too see a sample certificate from one of our window systems.

Door Construction

Our doors are manufactured to a 44- 64mm finish.

StockFold doors are usually 44mm thick allowing for a 4:6:4 double glazed unit. These doors still meet part L building regulations but are not as thermally insulative as our thicker doors.

InternaFold doors vary from 44mm to 64mm depending on the usage. 44mm thick doors are used if solid panels or single toughened safety glass is required. 54mm thick doors are used when standard double glazed units are required. 64mm thick doors are used when integrated blinds or triple glazing is specified.

Bi Fold Door Systems – Photo Gallery

Core Features

316 Stainless Steel Hardware

All our exterior products come with 316 Marine Grade Stainless Steel as standard. Guaranteed for 10 years even in coastal locations.

4 Hardware Finishes Available

Hardware available in Polished Stainless, Satin Stainless, Polished Brass & Black.

Integrated Blinds

Integrated blinds available in several colours and 5 operating mechanisms

Versatile Configurations


With or Without Bottom Guide

Some systems do not require a botttom guide

Even & Odd Number of Panels

Choose an even or odd number of panels 

Light Weight and Heavy Duty Options

Door panels from 16kg to 100kg

19mm - 64mm Thick Doors

A choice of panel thicknesses to suit your requirements

Solid Timber or Glazed Panels

Choose from solid or glazed panels

Not Sure What You Require

Call or Email us to discuss your exact needs.

Order Your Bi Folding Doors & Windows Today