Energy efficient windows from dem

DEM energy efficient windows are proven to save energy and reduce rising fuel bills, as well as lowering carbon emissions.

Why the need for Window Energy Efficient Windows?

Poorly constructed windows are a major source of heat loss and will increase the cost of keeping a building at a comfortable temperature – be it keeping warm or cool. Energy efficient windows from dem are constructed form thermally efficient profile and specially selected glazing units. The net result of which is a reduction in fuel bills and negative impact on the environment through lower carbon emissions.

Window Energy Rated (WER) – a basic definition

The Window Energy Rating (WER) method calculates all of the relevant factors in the energy efficiency of a window. As well as including the ‘loss factors’ such as U-value, it also includes the ‘gain factors’ such as the solar heat gain. The rating covers the frame material, the frame design, the glass type and all the other components that make up the window.

Look out for the WER labels on our windows

The WER label on dem windows illustrates the energy efficiency of that specific product. Energy labels can be provided to you as a certificate on request – please ask for futher details.

Coloured foil products
We now offer a choice of colour foils to suit different applications using System 10 and Rustique profile on all windows and doors. Ask to see samples from a great choice of colours.

White
Cherry or Cherry on white
Rosewood, Rosewood on white
White foil on both sides
Cream foil both sides
Irish Oak
Irish Oak on white
Chartwell Green
Chartwell Green on White
Black
Black on white
Anthracite Grey
Anthracite Grey on white

Casement Windows

We offer a wide range of casements with a number of opening configurations and colours of your choice. You can decide between a sculpted or chamfered shape edging. All casements are internally glazed using 28mm glazing units with our outerframes fully reinforced and sashes reinforced to standards using galvanised steel section.

We offer the option of security hardware including Kore espagnolette locks as standard, Yale security shootbolts, Nico friction stays, locking handles – all tested to the latest industry standards.

Ask to see samples from a great choice of colours.

White , Cherry or Cherry on white
Rosewood, Rosewood on white
White foil on both sides
Cream foil both sideS
Irish Oak
Irish Oak on white
Chartwell Green
Chartwell Green on White
Black
Black on white
Anthracite Grey
Anthracite Grey on white

Flush Sash Windows

The Flush Sash system is crafted from modern, weatherproof PVC-U, which – unlike traditional timber windows – will never need sanding or repainting and will never rot, split or swell. These low-maintenance windows will keep your home looking its best for years to come, with no more work than an occasional wipe with a damp cloth.

Flush Sash can be specified in bespoke sizes to suit the windows of your home, whether it’s a tall townhouse or a quaint and cosy cottage. Georgian bar detailing can also be fi tted within your windows to give the ‘lattice’ effect often found in historic homes.

Heritage houses can often be associated with damp and draughty living conditions due to ill fitting windows, or ineffective single glazing. Choosing the Flush Sash for your home can solve these problems and more. Energy-efficient, high-spec PVC-U frames and double or triple glazing will keep your home significantly warmer and could dramatically lower your heating bills. These features also prevent condensation forming and will significantly reduce unwanted outdoor noise.

Vertical Sliding Sash

Our traditional sliding sash window is designed to offer clients the potential to perfectly match the existing timber product in their housing stock. Taking all the finest points of the traditional design, the PVC-U version matches the aesthetic appeal while offering superior performance and maintenance benefits. Weights and pulleys are replaced by sophisticated spring and spiral balances, and a unique tilt facility to enable cleaning of sashes safely from the inside.

Features & Benefits

Traditional front to back profile dimension to match existing box arrangements
Sections designed to match traditional aesthetic appeal
Deep bottom rail option
Upper and lower sashes tilt inwards for ease of cleaning
Traditional astragal Georgian bar arrangements
Traditional hardware design and functionality
Full range of style options and sizes to enable replacement of traditional products

Tilt & Turn

Two operation windows, first or tilt position offers ventilation, second or turn position offers cleaning and egress
‘Safe’ locking handles provide safety in use features
High security locking mechanisms
Windows open inwards into the room

Bays/Bows

Bow and Bay windows can really enhance a home. A bow window not only creates an attractive window ledge feature but it also allows the light to flood in. This is also true of bay windows – but additionally a bay adds more space, extending the floor-plan of any home.

Bow and bay windows often work well in pairs – giving homes a symmetry that is pleasing on the eye. Both bays and bows requires canopies in fibre glass, PVCu, decorative Lead or a tiled roof. The double glazed units can be supplied in clear glass, lead patterns or decorative patterns.

Features & Benefits