Slimline Doors and Windows

Slimline doors and windows, also known as ultra-slim or minimalist, comprise those products where the sightlines are smaller and less visible than regular windows and doors. Then there are slimline products where it’s the installation or hidden frames also resulting in minimal looks or appearance of frameless doors and windows.

The range of windows and doors marketed as slimline is frequently confusing. Consequently, it’s important to understand the difference between these many marketing messages and the genuine slimline and ultra-slim product.

slimline doors and windows

Information about slimline or ultra-slim doors and windows

First of all, most of the doors and windows intended as slimline tend to be upper-tier systems and therefore cost more than regular windows and doors. Often these systems come with engineering and design intended for large sizes and contemporary architectural glazing. As a result, they come in more expensive systems.

Furthermore, doors and windows of this type frequently rely on the glazing for structural stability. In other words, the slimline aluminium may not provide the strength required owning to its smaller proportion. Alternatively, while slimline and ultra-slim glazing appears thin face on, at the same time it comes deeper than regular windows and doors. Again this is for retention of the performance, strength and stability of the product.

Exterior quality doors and windows come with insulated aluminium profiles and a good specification glass. Interior doors as well a screens come in two versions. One is an exterior grade door customised for interior use. Another is a dedicated interior system. These frequently come without any profile insulation as it’s not required. As well as this, interior products come single glazed too.

Virtually any type of door or window comes in a slimline version.

Slimline and ultra-slim sliding doors

slimline patio doors in white

Probably the best known and most asked-for amongst slimline doors and windows is sliding doors.

Sightlines start at around 16mm at the door mullions, therefore making these perfect for making an interior space bright, spacious and light filled.

A common mistake made with these doors is the assumption you get the same sightlines around the door frame as the middle section. With a standard installation, not recessed into a new structure, always expect thicker aluminium profiles around the doors.

Importantly, slimline sliding doors come with several considerations and questions when buying. Installation, options and configurations often come more complex than conventional sliding patio doors. We’ve comprehensive information about thin-framed sliding doors, helping to buy better.

Ultra-slim bifolding doors

ultra-slim bifolding doors

Slimline bifolding doors are another product with many different brands and systems. For bifolds, interior, as well as exterior grade doors, provide solutions.

For exterior bifolding doors, it’s unlikely you’ll find aluminium sightlines similar to sliding doors. With 99mm sightlines, Solarlux Ecoline bifolds are presently one of the best amongst the slimmest bifolding doors brands.

Other systems provide even more minimal systems using the slide and turn system. Then you’ll find premium models such as Sieger Lux and Fineline with alternative designs and even thinner frames.

Finally, some more advanced systems offer options for recessing the frame into the structure creating even more minimalist sightlines. However these also come with a price to match.

Thin profile floor-to-ceiling glazing and curtain walling

slimline floor-to-ceiling glazing

For modern homes, floor-to-ceiling glazing and curtain walling provide products spanning two or more floors.

These products utilise designs found in commercial facades. The construction involves box mullions of various sizes, assembled on site and creating large screens.

As well as providing large fixed glazing, these systems also integrate fully with sliding doors, bifolding doors and opening windows. The slimness of these profiles depends especially on several factors.

Location, wind loadings, supports and whether tied back to any floors are all essential requirements. Often, the larger the screen the thicker the mullions and frames. However, it’s common to find face widths of 50mm. Frame depths vary from 50mm up to more than 200mm for the largest facades.

Slimline windows

slimline windows with doors in black

Finding slimline windows for regular window replacements is often confusing for buyers. Many aluminium window brands come with a slimline version and standard frame sizes.

However, it’s easier providing thin windows for new build openings than providing slimline windows for window replacements.

In addition to standard aluminium windows, specialist installers provide minimal framed windows. There’s also windows designed to hide within the frame giving an all glass look.

Interior doors, windows and screens

slimline steel-look doors

For interior windows and screens, products designed for internal use frequently provide the best solution. Alternatively, exterior grade doors and windows do work inside the home in many situations.

The insulation and performance benefits of exterior windows and doors aren’t required internally. However, double glazing provides acoustic solutions when correctly chosen.

You’ll find slimline interior doors, windows and screens in all manner of systems, brands and designs. There are also near frameless versions available too. Steel-look glazing is one of the most sought after amongst these thin-framed products.

More information about slimline doors and windows

These more advanced windows and doors you’ll find at specialist suppliers. We do not recommend buying these advanced products online. Manufacturing quality and installation by trained installers always provides the best result.

Use our contact form for more information about slimline and ultra-slim windows and doors. We help homeowners with product information and putting them in touch with local suppliers. The trade also benefits from our trade supplier suggestions and recommendations.