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STM Tinium

Quality, Durability, and Low Maintenance.

The STM Tinium window combines the natural look of a timber frame with the practicality of an aluminium-wrapped exterior. Unlike the majority of other composite windows, the aluminium on this product can be sealed directly to the building. Most other products have an aluminium rain screen, which needs to be left completely clear-draining and clear-ventilating. This product can thus be installed in a more traditional way. Water never comes into contact with the timber, and the timber is guaranteed to be a knot-free finger-jointed finish.

The powder-coated aluminium requires no maintenance, other than washing a few times a year. Discover more about the unique construction of this Scandinavian composite window at the links below.

Full Details
Whilst the timber frame means excellent natural insulation and a classic appearance, the composite material is used for the joints in the frame. This ensures that a moisture-resistant material is used in areas where the unit is most vulnerable to the elements.

STM’s aluminium profile goes through a nine-step manufacturing process and only the highest quality powder coating is used. The result is a sturdy, beautiful and premium-quality finish.

Drainage in the unit – built in as standard – ensures that rainwater runs straight off the window. As a result, water does not come into contact with either the timber or with other parts of the building.

With the Tinium aluminium-clad window, appearance and functionality will be as good as new, year after year.

STM Windows is a Danish manufacturer of high quality, made-to-order windows and doors which include both timber (softwood, mahogany and oak) and aluminium clad products.

With over 45 years’ experience and utilising state-of-the-art manufacturing facilities, STM Windows’ focus is on delivering high quality, superb products supported by first-class service and back-up.

STM have a complete range of windows and doors to provide the perfect solution for your dream home. Their products achieve the highest levels of energy and environmental performance to ensure comfort that won’t cost the earth

DesignInterior: Knot-free timber heartwood
Rebate: Highly insulating and maintenance-free composite structure
Exterior: Aluminium Profiles
Warranty10 years
Lead Time8-10 weeks from sign off
Best U-ValueOverall: 0.8 W/m^2k Ug: 0.40 W/m^2k
Finishes Any RAL Colour for both timber and aluminium
Click here for standard colours
GlazingTriple, Obscure, Solar, Laminated, Toughened
Performance and
3 layers of low-energy glass panes, with a warm edge.
Highly Insulating and Maintenance-Free Composite Structure
All units are filled and sanded before painting (130-140 microns)
Maximum SizesClick here for sizes
Manufactured inDenmark
Opening Configurations

Fixed Frame

Fixed Frame Configuration

Side Guided

Side Guided Configuration

Side Hung

Side Hung Configuration

Top Guided

Top Guided Configuration

Tilt and Turn

Tilt Turn Configuration

Our Configuration Options for Bespoke Windows page contains additional information about each of the options shown above, it may also be helpful in choosing how to configure your windows to best suit your needs.


Single Door

Entrance Door Configuration

Double Doors

French Doors Configuration

Tilt and Turn

Tilt Turn Configuration

Sliding Door

Sliding Door Configuration

We have and extensive range of doors available in STM Tinium, the images above show some of the general configuration options available. For more information about the opening types and how each can best be used see our Bespoke Doors page.

For more in-depth options on the look of single or double doors our Choosing a Panelled Door and Choosing a Glazed Frame-Door pages will go into more detail.


Window handles

Stm Tinium top guided window with hoppe handle
Satin Chrome Locking Window Handle
STM non locking window handle
STM Tilt Turn window handle

Entrance and Panel Door handles

STM Entrance  Door Handle

Terrace Door handles

STM Internal thumb turn and window handle on a terrace door

Our Danish Window and Door Handles blog post goes into more detail about the handles available for our STM products.


RAL Colour options in the standard range for STM Tinium

For a full list of colour options including clear laquers and special colours, pelase see the STM brochure

Timber colour options

RAL7013 – Brown grey

RAL8016 – Mahogany brown

RAL8007 – Fawn brown

RAL6009 – Fir green

RAL3001 – Signal red

RAL8019 – Grey brown

RAL7004 – Signal grey

RAL3011 – Brown red

RAL5010 – Gentian blue

RAL6001 – Emerald green

Aluminium colour options

RAL7042 – Traffic grey A

RAL3011 – Brown red

RAL6012 – Black green

RAL8016 – Mahogany brown

RAL5013 – Cobalt blue

Where you see a next to a colour, clicking on it will take you to a page of our client galleries that use that RAL Colour.
Some colours are subject to additional lead time from STM.
Colours shown should not be used in place of an official RAL colour sample. We cannot guarantee colour-accuracy when viewed on-screen or printed out.
Chop Sample

STM Tinium Chop Sample

STM Tinium

Please note that STM Tinium is now triple glazed as standard; the brochure has not yet been changed to reflect this upgrade.

Below are some of our recent galleries which include STM Tinium