Foam Insulation – RIGIFOAM SPF Roofing System Saves 29% Electrical Costs
Spray Foam Insulation
In 2000, an owner of metal warehouse and manufacturing buildings retrofitted two roofs with a spray polyurethane foam (SPF) roofing system. To his pleasure, persistent damaging roof leaks and condensation problems vanished. In fact, the building was so much more comfortable that the manager relocated his office to the one of the retrofitted spaces. When in 2009 the owner decided to retrofit three more roofs in the same industrial park, finding his solution was easy: a RIGIFOAM spray polyurethane foam roofing system. It is Spray Foam Insulation
The need was apparent. In one of these buildings, for example, the roof leaks and condensation saturated the vinyl-faced glass fiber insulation that was hung under the metal roof. The building’s energy inefficiency and poor air sealing meant that the office space demanded separate air and heating systems, in addition to the manufacturing area. The consequence? Uncomfortable workers, high energy bills and buildings with envelopes that were rapidly in decline.
Before the RIGIFOAM Spray Polyurethane Foam Insulation roofing retrofit was underway, the building owner and RIGIFOAM decided to track the building’s overall performance before and after installation. The building owner agreed
to share utility bills with RIGIFOAM for a year. They also installed a data logger to monitor the roof deck temperatures and relative humidity levels every 30 minutes for approximately two months. Additionally, infrared thermal scans were taken before and after to visually capture thermal breaks.
The Numbers Don’t Lie: Dramatic Results Shown
On October 18th 2008, the RIGIFOAM Spray Polyurethane Foam Insulation roofing system was installed. As seen in the middle of the chart above, the system immediately provided a buffer to the severe temperature swings and minimized the thermal breaks at beams and supports.
The RIGIFOAM polyurethane foam roofing system applied included:
- RIGIFOAM ELASTOSPRAY® 81285 polyurethane foam (1.5 inches applied for an R-value of 9.5) applied to the existing standing-seam metal roof. ELASTOCOAT™ S-5000 silicone protective coating spray applied to the
- ELASTOSPRAY polyurethane foam as the weather resistant membrane
- Roofing granules were added onto the top coating for added durability and improved aesthetics.
Between the winter months of 2008-2009, the utility data indicates a reduction in electrical usage by 29% and a reduction of gas usage of 9% over the previous “control” winter which was approximately 4°F warmer.
The owner was very satisfied. The SPF contractor company has now completed five similar projects in this complex over the past year.
RIGIFOAM ELASTOSPRAY Roofing System:
- Solved the condensation and leaking problems
- Saved 9% in gas and 29% in electrical usage over the winter months
- Increased overall occupant comfort
- Increased the strength of the roof
Moreover, the owner can depend on a long service life with a new RIGIFOAM SPF roofing system because it dramatically reduces the expansion and contraction of the metal with temperature changes which cause seams to open and leak. There are no fasteners in the system, so there are no holes through which water can infiltrate causing damage to the overall building envelope.
The RIGIFOAM ELASTOSPRAY system is fluid applied and fully adheres to the metal substrate. And according to studies conducted by the National Roofing Contractors Association, closed-cell polyurethane roofing system increase wind resistance making them superior retrofit solutions for aging metal roofs and more.