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Single Window SW-4

45mm spruce top-hung window with 4+6+4 double glazing, rubber draught excluders, and black hardware. Compatible with Dadsons timber garden buildings.

Key specifications

Overall frame size: 886 × 1011 mm
45mm spruce profile
4+6+4 double glazing with silicone sealant
Top-hung opening, allen key adjustable hinges
Rubber draught excluders for wind and water resistance

Spruce Top-Hung Window with Double Glazing & Full Weather Seal

The SW-4 is a timber window perfect for timber buildings. Constructed from 45mm spruce, it combines robust framing with practical functionality, delivering reliable weather resistance and thermal performance for seasonal and year-round garden structures.

Timber Framing with Double Glazing

The SW-4 features a 4+6+4 double-glazed unit sealed with silicone sealant, providing effective insulation against heat loss and condensation. The top-hung opening mechanism is fully adjustable via an allen key at the hinges.

Weather-Resistant Construction

Rubber draught excluders integrated into the frame perimeter block wind and water ingress, ensuring a tight seal across all weather conditions. The spruce casing is fitted with rubber sealants for additional moisture protection, extending service life with minimal maintenance.

Quality Hardware Throughout

Hinges are supplied with decorative black covers for a clean, finished appearance. A black high-quality handle completes the hardware package, providing consistent aesthetics across all visible components. This window arrives ready to fit, with all hardware included.

Specifications

Width

88.6 cm

Height

101.1 cm

Applications

Doors & Architectural Joinery

Garden Retreat & Outdoor Living

Enhance your lifestyle by extending your living area into nature. Create a serene sanctuary for relaxation, reading, or yoga with our garden structures. Our durable timber decking, pergolas, and summer houses transform your garden into a functional outdoor living room. Experience the tranquility of natural wood and create a dedicated space for leisure and family enjoyment.

Guest Accommodation & Hospitality

Expand your living space and welcome visitors in style with high-quality guest accommodation. From cozy backyard cabins for family visits to premium holiday rental units for Airbnb, we provide the essential foundation. Our complete wooden houses offer turnkey convenience, while our structural timber ensures robust frameworks for custom hospitality projects and extensions.

Home Office & Creative Studio

Create the perfect productive environment just steps from your home. Whether you need a distraction-free home office, an inspiring art studio, or a craft workshop, our solutions offer the ideal space. Choose from our range of ready-made garden buildings or utilize our premium timber materials to construct a bespoke workspace designed for year-round comfort and professional focus.

Windows

Workshops & Hobby Rooms

Dedicate a robust space to your passions with our heavy-duty workshop solutions. Whether you are into woodworking, mechanics, or pottery, our "Active" line of garages and reinforced cabins offers the strength and space you need. With solid floors, thick walls for tool mounting, and ample room for workbenches, these buildings provide a secure and durable environment for all your hands-on projects and loud machinery.

Why choose Single Window SW-4?

Double-Glazed Thermal Performance

The 4+6+4 double-glazed unit, sealed with silicone sealant, reduces heat transfer and minimises condensation. This makes the SW-4 a practical choice for both seasonal garden rooms and more regularly used timber structures.

Robust Weather Sealing

Rubber draught excluders around the frame perimeter provide an effective barrier against wind and water penetration. Combined with rubber-sealed spruce casing, the SW-4 maintains its seal integrity across varied climate conditions.

Finished Hardware Package

All hardware is included: a black high-quality handle, hinges with decorative black covers, and integrated rubber seals.

Spruce Construction for Natural Durability

The 45mm spruce profile offers a solid, dimensionally stable frame that pairs naturally with Dadsons timber building range.

Frequently Asked Questions

The SW-4 has an overall frame width of 886 mm and a frame height of 1011 mm. The glazed aperture within the frame measures 706 mm wide by 796 mm tall.

The SW-4 uses a 4+6+4 double-glazed unit — two 4 mm glass panes with a 6 mm air gap — sealed with silicone sealant. This configuration provides standard thermal insulation suitable for garden buildings.

The SW-4 is a top-hung window, meaning it pivots from the top frame rail. The opening angle can be fully adjusted using a standard allen key on the hinges.

The SW-4 comes complete with a black high-quality handle, hinges with decorative black covers, and rubber draught excluders fitted around the frame perimeter.

Spruce timber windows should be inspected annually and treated with a quality exterior wood preservative or paint system to protect against moisture and UV exposure. Rubber seals should be checked periodically and replaced if signs of compression or cracking appear.

Yes. Dadsons supplies windows as part of its complete kit building packages, and the SW-4 can also be ordered separately as a compatible component for existing or custom structures.

Quality Materials Inside

Sawn Timber: Pine and Spruce for Construction

Discover our high-quality sawn timber from pine and spruce, ideal for construction with natural moisture, eco-friendly properties, and versatile sizing options.

Glued (Laminated) Wooden Beams and Boards

Discover glued wooden beams and boards made from pine and spruce, offering high moisture resistance, load capacity, and splinter-free handling for furniture, stairs, and windows.

Solid Glued (Laminated) Spruce Panels

High-quality solid glued panels made from premium spruce, available in various thicknesses, lengths, and widths, with hand-planed and sorted finishes for superior quality.

BS 2482:2009 Certified Scaffold Boards

Compliant with BS 2482:2009, our scaffolding boards feature metal plate clamping and come in multiple sizes for versatile construction applications.

Sawn Timber: Pine and Spruce for Construction

Discover our high-quality sawn timber from pine and spruce, ideal for construction with natural moisture, eco-friendly properties, and versatile sizing options.

Glued (Laminated) Wooden Beams and Boards

Discover glued wooden beams and boards made from pine and spruce, offering high moisture resistance, load capacity, and splinter-free handling for furniture, stairs, and windows.

Solid Glued (Laminated) Spruce Panels

High-quality solid glued panels made from premium spruce, available in various thicknesses, lengths, and widths, with hand-planed and sorted finishes for superior quality.

BS 2482:2009 Certified Scaffold Boards

Compliant with BS 2482:2009, our scaffolding boards feature metal plate clamping and come in multiple sizes for versatile construction applications.

Other Wooden Houses

Windows & Doors

Standard Double Window SDW 2

Tall format 1326 x 1686 mm double-glazed wooden window. Manufactured from Nordic spruce for 44mm and 68mm log cabin walls. Tilt-and-turn functionality.

Windows & Doors

Premium Single Door GD-2

A clean, solid timber door with a warm natural finish and a simple three-panel design. It comes pre-hung in a matching wooden frame, with black hinges and a black lever handle for a crisp, modern contrast. Outward opening, 1054 x 2072 mm. Ideal for timber garden buildings.

Windows & Doors

Premium Window GW-4

Premium 878×1981mm tilt-and-turn timber window with 68mm laminated pine profile and 4+16+4 LowE glazing. U-value 1.1, MACO hardware, for garden buildings.

Windows & Doors

Fixed Window SFW-5

Spruce fixed window SFW-5, 886 x 1956mm with 45mm profile and double glazing. Compatible with Dadsons timber structures. Request a trade quote.

Windows & Doors

Premium Window GDW-2

Premium tilt-and-turn wooden window (878 x 1306 mm) featuring a 68mm glued pine profile. Includes double glazing and cover boards with rubber sealants.

Windows & Doors

Premium Tilt-and-Turn Window GDW-4

High-performance 68mm glued pine window (878x1981mm) with double glazing and tilt-and-turn mechanism. Includes cover boards and professional rubber sealing.

Windows & Doors

Garage Door SGD-2

Double-leaf timber garage door SGD-2. Spruce construction with steel hinges, rubber draught excluders, and outward opening design. 2576x2113mm. B2B supply across Europe.

Windows & Doors

Double Door GDD-1

A premium laminated pine double door with a clean, modern profile and full-height glazing. Two large glass panels bring in maximum daylight, while the solid lower rails add strength and a grounded, finished look. Outward opening, weather-sealed.

Windows & Doors

Standard Double Door SDD-2

Classic spruce double door (1416 x 2043 mm) designed for garden houses. Features solid timber frame, double-glazing compatibility, and durable hardware.

Windows & Doors

Double Window Model SDW-1

Premium double-glazed wooden window (1326x1271 mm) for 44mm log cabins. Features solid Baltic pine construction, 4-6-4mm insulation, and tilt-and-turn functionality.

Standard Double Window SDW 2

Tall format 1326 x 1686 mm double-glazed wooden window. Manufactured from Nordic spruce for 44mm and 68mm log cabin walls. Tilt-and-turn functionality.

Premium Single Door GD-2

Premium Window GW-4

Premium 878×1981mm tilt-and-turn timber window with 68mm laminated pine profile and 4+16+4 LowE glazing. U-value 1.1, MACO hardware, for garden buildings.

Fixed Window SFW-5

Spruce fixed window SFW-5, 886 x 1956mm with 45mm profile and double glazing. Compatible with Dadsons timber structures. Request a trade quote.

Premium Window GDW-2

Premium tilt-and-turn wooden window (878 x 1306 mm) featuring a 68mm glued pine profile. Includes double glazing and cover boards with rubber sealants.

Premium Tilt-and-Turn Window GDW-4

High-performance 68mm glued pine window (878x1981mm) with double glazing and tilt-and-turn mechanism. Includes cover boards and professional rubber sealing.

Garage Door SGD-2

Double-leaf timber garage door SGD-2. Spruce construction with steel hinges, rubber draught excluders, and outward opening design. 2576x2113mm. B2B supply across Europe.

Double Door GDD-1

Standard Double Door SDD-2

Classic spruce double door (1416 x 2043 mm) designed for garden houses. Features solid timber frame, double-glazing compatibility, and durable hardware.

Double Window Model SDW-1

Premium double-glazed wooden window (1326x1271 mm) for 44mm log cabins. Features solid Baltic pine construction, 4-6-4mm insulation, and tilt-and-turn functionality.