Green Roof Study Confirms Quad-Lock Insulated Concrete Forms Provide Superior Thermal Performance
07/18/2011

After the completion of a 2 year study by BCIT Centre for Architecture Ecology, Quad-Lock's Insulated Concrete Forms and Green Roof structure outperformed the rest.

Online PR News – 18-July-2011 – – Surrey, BC: Quad-Lock Building Systems, Ltd. is pleased to announce the completion of a 2-year Green Roof research project in partnership with the British Columbia Institute of Technology (BCIT) Centre for Architectural Ecology. The BCIT facility has the mission of providing world-class independent research and education in the field of green roof and living wall technology. The goal of this study was to provide objective data on the performance of various green roof structures. To our knowledge, this is North America’s first green roof study to be completed on an Insulated Concrete Form (ICF) structure.

Quad-Lock’s Green Roof test structure (referred to as REM-10, pictured to the right) incorporated an R-10 insulated slab foundation, Quad-Lock R-22 walls (6" concrete), and R-22 Quad-Deck (9" panels with 3" concrete slab) for the roof structure that’s topped with a green roof layer (see attached photos). This was compared side-by-side to a "control roof structure" featuring wood-framed walls and roof with an asphalt roofing layer (called Reference Roof).

The BCIT collected electronic data and evaluated the following:
• Thermal performance and associated energy cost savings
• Carbon emissions saved per square meter
• Stormwater runoff quantity and quality for reuse
• Plant species growth, soil media performances and maintenance requirements

Highlights of the findings include:

concrete slab) for the roof structure that’s topped with a green roof layer (see attached photos). This was compared side-by-side to a

Heat Loss: Depending on the season, the Quad-Lock/Quad-Deck Green Roof REM-10 structure demonstrated a 50 to 75% reduction in heat loss, compared to the wood-framed control structure.

Heat Gain: Across all seasons, the REM-10 demonstrated an average 99% reduction in heat gain, compared to the wood-framed control roof structure.

Stormwater Runoff: Compared to a conventional roof without green roof layer, the REM-10 retained a yearly average of 69% of the rain falling on the roof surface, with 31% potentially available for reuse or disposal in a municipal system.

(See samples of some of the collected data attached.)

Comparing the heat flow performance of the two structures, it is noteworthy that there were near-constant temperatures measured on the interior of Quad-Lock’s REM-10. These data provide direct validation of what we hear regularly from ICF building owners “the temperature just never seems to change in our house”.

The clear benefits of ICF construction (and now green roofs) are increasingly supported by studies from respected institutions, like BCIT, CMHC, and its industry partners. What the ICF industry has known for decades is now being proven in building science circles. In fact, BCIT Study Director, Maureen Connally calls green roofs “...the greatest real estate opportunity of this century.”

All modern buildings should have a clear Energy Management Strategy with Insulated Concrete Forms and Green Roofs being an integral part to meet or exceed sustainability objectives. The Quad-Deck Roof Forming system can be used to construct the ideal roof substrate for Green Roofs, combining better resistance to moisture, long span capacity, high load capacity, and lots of insulation.

Douglas Bennion
Manager, Quad-Lock Training and Technical Services

Quad-Lock Building Systems, Ltd. is dedicated to improving our environment & well-being by offering sustainable building solutions. Quad-Lock provides Insulated Concrete Form (ICF) systems for walls, floors and roofs that create very energy-efficient, comfortable, and safe buildings, as well as an insulation solution for the renovation & energy retrofit markets. Quad-Lock's ICF solutions are used in many types of building construction: residential, commercial, institutional, above grade, below grade, tilt-up and others. Quad-Lock's professional partners and staff pride themselves in providing excellent customer support from start to finish. All Quad-Lock products are not only manufactured under the most demanding quality standard in the world, ISO:9001 but also the most exacting environmental standard for manufacturers, ISO:14001.

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