Welcome to Direct Line Timber Ltd., your trusted source for high-quality DK13 Inward Opening Double Glazed Wood and Aluclad Windows. We are located at 122 Liff Rd, Dundee, with over 25 years of experience in the timber window and door industry. Our dedicated team, boasting a combined experience of more than 80 years, is committed to offering you the perfect combination of price, quality, and service.
Experience the unparalleled craftsmanship of Viking Window AS, our trusted partner in creating DK13 Inward Opening Windows. Viking Window AS, founded in 1996, is a well-established wooden window and door manufacturer renowned for its unwavering commitment to quality, bespoke products, and environmental responsibility.
Our DK13 Inward Opening Double Glazed Wood and Aluclad Windows are the most popular window type in Central Europe and are also popular in Scotland and the rest of the UK. Tilt and Turn Windows open inwards making them easy to clean from the inside and providing a large clear opening for Fire Escape purposes. U Value for this window is 1,29 W/m2K.
This window features a 26mm Argon Filled Double Glazed Unit with a UG of 1.1 W/m2K.
Our DK13 Wooden Window is available in Tilt and Turn, Tilt only, Turn only, fixed light and shaped frame styles.
DK13 wooden window:Traditional, enduring, energy efficient, sustainable. |
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DK13 Aluclad window:Modern, enduring, energy efficient, sustainable. |
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Our DK13 Tilt and Turn window opens inwards in two ways, traditional side hung (turn) and ventilation opening (tilt from top of the sash). Micro ventilation is also a possibility. A ventilation restrictor device can be added to hardware to fix the sash in position after tilting. Maximum sash weight is 100 kg. Also available as a double sash french window (flying mullion).
Our DK13 Turn only window opens inwards to one side (turn). Maximum sash weight is 100 kg. Also available as a double sash french window (flying mullion).
Our DK13 Tilt only window tilts inwards from the top a little to allow ventilation. Maximum sash weight is 100 kg.
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MULTI LIGHT (WITH TRANSOMS AND MULLIONS)Our fixed lights and windows with mullions and transoms are a solution including a glass unit installed directly into the window frame, a good way to increase light gain to the inside of the building. Our product line also includes a wide variety of possibilities for structurally dividing frames with mullions and transoms. Single, multi-light window frames can be manufactured in sizes up to 2.5m x 3.2m
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Sound Insulation |
Rw = 35 dB (-1;-5) – standard glazing |
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Frame Depth |
78 mm (111 mm with alucladding) |
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Material of Sash and Frame |
Glue-lam pine; quality class A1-A3 |
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Glazing |
40 mm 3-glazing, two LowE glasses, argon filled or 26 mm 2-glazing, one LowE glass; argon filled |
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Hardware |
ROTO; Hoppe handle |
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Aluminium Cladding |
Optional external alucladding |
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Thermal transmittance |
Uw = 0,94 W/m²K (3-glazed opening standard window) |
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Number of sash gaskets |
2 sash gaskets |
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Dimensions |
Tilt and turn opening: Sash: W 394-1704 mm x H 500-2572 mmTurn opening (sidehung): Sash:Â W 394-1704 mm x H 500-2572 mmTilt opening: Sash:Â W 414-2054 mm x H 412-1322 mmTilt before turn opening: (i.e TBT): Sash: W 394-1704 mm x H 500-2572 mm |
Viking Window AS, with 25 years of experience, operates in Estonia, Nordic Countries, UK, Ireland, and Japan. Their core values revolve around quality, bespoke products, accuracy, and continuous improvement. As an ISO9001 and ISO14001 certified company, they demonstrate their commitment to quality and environmental management.
Their vision is to become the premier high-quality traditional wooden window and door manufacturer in Europe. They prioritize customer satisfaction through product quality and professional services.
Viking Window AS follows Vindus Industrien (Denmark) Technical Requirements, a recognized best practice in the window industry. They have achieved several milestones, including certifications for energy-efficient windows, security standards, and recognition as a training-friendly organization.
The company uses timber from responsible sources with a chain of custody certificate since 2007 and has been ISO14001 certified since 2005 and ISO9001 certified since 2000.
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| Opening type | |
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| Hinge type | |
| Glazing type | Double glazed, Triple glazed, Toughened glass, Laminated glass, Obscure glass |
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| U Value |
