Strongline – high-performance wooden window system
The Strongline system is a modern, energy-efficient wooden window solution designed to combine aesthetics and high performance. Offering a variety of wood species and advanced insulation features, it’s ideal for contemporary homes seeking warmth and sustainability.
Key features:
- Superior thermal insulation: U Factor from 0.1762 – 0.2115 Btu/hft²F (1.0 – 1.2 W/m²K) for excellent energy efficiency.
- System depth: 3 5/8 in (92 mm metric), optimized for durability and insulation.
- Wide range of wood species: Customizable finishes to match various architectural styles.
- Double-chamber glazing: Enhances energy efficiency and insulation performance.
- Three sealing layers: Provides superior weather resistance and airtightness.
- Double drip cap: Prevents water accumulation, protecting the window frame and improving longevity.
Benefits of Strongline:
- Energy efficient: High thermal performance ensures reduced energy costs and better indoor comfort.
- Aesthetic flexibility: Choose from a wide range of wood species for a personalized look.
- Weather resistance: Three sealing layers and a double drip cap protect against the elements.
Alutrend – Modern System Made of Wood and Aluminum
Sopot together with Bertrand. Here you can meet us – Bertrand – Windows & Doors
STRONGLINE window. An innovative line of windows that combines the natural qualities of wood and functional properties coming from the use of modern solutions. The depth of the casing and sash is 3 5/8 in (metric – 92 mm) , which makes Strongline the most stable and durable profile on the market. The heat transfer coefficient of the casing and sash amounts to 0.1762 – 0,2115 U Factor (summer) IP from: 0.1762 – 0,2115 Btu/hft2F U Factor (metric) IP from: 1,0 – 1,2 W/m2K. This means absolutely superior thermal protection. The porous structure of the wood and the system of structural grooves in the profile ensure that the interior of your home is perfectly protected against rain, wind, pollution and noise, while maintaining optimal ventilation of the rooms. The massive appearance of a Strongline window we have softened by rounding the window’s edges and introducing the decorative cutters, thanks to which the window looks very solid, yet elegant.
We offer the possibility to equip the windows with additional accessories which will improve its heat-absorption, sound-proof properties and the burglary resistance, as well as its beauty.
The Strongline system windows are available in two versions:
Master and Retro
on the outer edge of the sash we placed an additional aluminium cover, which protects this part of the window from the solar radiation and rainwater.
Bertrand uses the most advanced varnishes for wood.Our AQUATOP varnish, which we use as standard, protects surfaces from the weather and gives them a smooth and long-lasting protection.
AQUATOP is characterized by excellent moisture resistance.It protects surfaces from water, rain and moisture, preventing problems such as rot, mold and damage that occurs over time.It provides reliable resistance all year round, in any climate.
Thanks to advanced and innovative varnishes and a careful manufacturing process that is a hybrid of automated sanding of flat surfaces and manual sanding of hard-to-reach surfaces such as the area inside the frame, our wood windows feature a smooth and flawless finish.
Bertrand wood windows are perfect for hot climates thanks to the use of cold pigmented varnish.