Energy efficiency in architecture is not a trend, it is a technical requirement. In high-performance buildings, every point of the envelope must meet strict criteria for insulation, airtightness, and thermal control.

In this context, the GradWall application with Supergradhermetic shutter has obtained Passivhaus certification, one of the most rigorous international standards in energy efficiency and indoor comfort.

This certification validates the system’s performance in one of the building’s most sensitive points: the glazed opening.

Single-family house in Passeig Matadepera

The opening: a critical point in the building envelope

In nearly zero-energy buildings, the opening cannot be treated as an isolated element. Incorrect execution of the junction between façade, window frame, and shutter box is responsible for:

· Significant thermal losses
· Appearance of thermal bridges
· Air leakage
· Condensation and associated pathologies

Under the Passivhaus standard, these factors must be eliminated through integrated and verifiable technical solutions.

GradWall: industrialized solution for an efficient opening

GradWall is an industrialized self-supporting system that integrates insulation, airtightness, and solar protection into a single construction application.

The system is manufactured with high-density Neopor® (30 kg/m³), a highly insulating material that guarantees excellent thermal performance. It incorporates cellular PVC profiles that act as a pre-frame for high-performance window systems, ensuring continuity of the insulating layer and elimination of thermal bridges.

Its main features include:

· Fully insulated and airtight box
· Continuity with the building’s thermal envelope
· Elimination of air leakage
· Improved acoustic insulation
· Suitable system for high-performance windows

GradWall transforms the opening into an active element within the building’s energy strategy.

Casa Iroco

Dynamic solar protection with Supergradhermetic

The integration of the Supergradhermetic shutter provides dynamic solar control and technical precision.

Thanks to its slats adjustable up to 120°, the system allows:

· Regulating natural light entry without glare
· Maximizing solar gains in winter
· Blocking direct radiation in summer
· Guaranteeing total blackout when necessary
· Allowing controlled ventilation without losing protection

In summer, it can significantly reduce cooling demand by preventing heat entry.

In winter, it minimizes thermal losses during the night and optimizes solar gains during the day.

The result is greater thermal, visual, and acoustic comfort throughout the year.

Single-family house Matadepera

Passivhaus certification: performance validation

Passivhaus certification confirms that GradWall meets the most demanding criteria in:

· High thermal insulation
· Elimination of thermal bridges
· Airtightness against leakage
· Efficient integration of solar protection

This recognition not only supports the system’s technical performance, but also reinforces our commitment to more efficient, sustainable, and industrialized architecture.

Efficient architecture. Measurable results.

Obtaining Passivhaus certification for the GradWall application with Supergradhermetic shutter confirms that the opening can stop being a weak point and become a strategic element in building efficiency.

GradWall is not only a solar protection system.

It is a comprehensive construction solution that optimizes the envelope, improves indoor comfort, and responds to current energy challenges with technical rigor and industrial precision.

One Pedralbes House