At Spycor Building, we’re proud to highlight exceptional projects that showcase innovative design and sustainable building solutions. One such project is the Integral House in Toronto, Canada, a stunning residence that blends architectural brilliance with advanced building materials, including the high-performing DELTA®-VENT S from our trusted vendor, Dörken Systems Inc.
The Integral House, often referred to as the Toronto Mansion, is a one-of-a-kind residence designed for mathematician and calculus textbook author James Stewart. Named after the integral symbol (∫) in calculus, the home reflects Stewart’s passion for mathematics and music through its curvaceous design and thoughtful integration with its natural surroundings.
Architectural Vision
Designed by Shim-Sutcliffe Architects, the Integral House is a testament to creative vision and precision. The architects used a grid based on cardinal points, incorporating alpha-numeric symbols to create what they called the “summa line”—a curved wall that echoes the f-holes of a violin. This 17,000 sq. ft. home features floor-to-ceiling glass for breathtaking views of the adjacent ravine, along with rooms nested within rooms, creating a dynamic interplay of intimate and expansive spaces.
The residence has earned widespread acclaim, including a Governor-General’s Medal in Architecture (2012) and recognition from the Museum of Modern Art’s director, Glenn Lowry, as “one of the most important private houses built in North America in a long time.”
Sustainable Innovation with DELTA®-VENT S
A key component of the Integral House’s success as a sustainable and energy-efficient home is the use of DELTA®-VENT S, a high-performing air and moisture barrier provided by Dörken Systems Inc. This three-ply membrane, featuring a vapor-permeable polymeric core between layers of spun-bonded polypropylene, ensures an airtight building envelope. This design promotes energy savings, reduces carbon emissions, and enhances occupant comfort.
Additional sustainable features include:
- 23 geothermal pipes for quiet, eco-friendly heating and cooling.
- A green roof that mitigates the urban heat island effect and enhances the home’s integration with its lush surroundings.
- Carefully selected materials based on life-cycle cost calculations to ensure long-term durability and efficiency.
Iconic Design Elements
From the street, the Integral House appears as a modest two-story structure, but its five-story ravine-facing façade reveals its true grandeur. The oak-clad base and etched glass exterior blend seamlessly with the surrounding forest of oaks, maples, and beeches. Inside, the home alternates between intimate rooms and open spaces, with curves and complex shapes that pay homage to Stewart’s love for music and mathematics.
A standout feature is the blue glass stairway, a collaborative creation by a glass artist, architect, and structural engineer. This striking staircase, made of hand-blown glass, bronze clips, and stainless steel cables, allows blue-tinted daylight to filter through a skylight, illuminating the living spaces below. The interior transitions from darker earth tones at lower levels to lighter, brighter hues higher up, mirroring the natural progression of the surrounding landscape.
The home’s two-story atrium is designed to host up to 200 guests for performances, parties, and community events, making it a cultural hub as well as a private residence.
A Legacy of Art and Architecture
Beyond its architectural significance, the Integral House has served as a vibrant space for the Toronto arts community. James Stewart hosted concerts, dance performances, fundraisers, and architectural tours, and the home was even featured in Chantal Kreviazuk’s music video for Into Me. Its accolades include:
- Mies Crown Hall Americas Prize, Shortlisted (2014)
- American Institute of Architects Honor Award, Interior Architecture (2012)
- Governor-General’s Medal in Architecture (2012)
- Architectural Woodwork Award, First Place (2009)
Why It Matters
The Integral House is more than a residence—it’s a celebration of innovative design, sustainability, and community engagement. By incorporating high-quality materials like DELTA®-VENT S, the project achieves a perfect balance of aesthetic excellence and environmental responsibility. At Spycor Building, we’re honored to distribute products like those from Dörken Systems Inc., which contribute to groundbreaking projects like this one.
