Sprayed Polyurethane Foam

What is SPF?

  • Installs over the existing roof
  • Waterproof
  • Windproof
  • Warranted leak free for 10 years (renewable)
  • Thousands of roofs still in service after 40 years.

NASA developed Spray Polyurethane Foam for its insulation performance and lightweight quality. Closed cell Sprayed Polyurethane Foam (ccSPF) is created when two liquids are combined and exposed to heat. When applied using a special spray gun, the foam expands to 20-30 times its original volume. The foam cures quickly producing a weather-tight, waterproof and seamless membrane over the substrate. In our in our roof waterproofing applications, we apply two applications of waterproof elastormeric roof coating to provide a durable, walkable, monolithic "cool" surface and protect the foam from UV damage caused by the sun.

The product we use is BaySeal High Density Roofing Foam and BayBlock HT (high tensile strength) Base and Top Coats. These products are produced by Bayer Material Science. This combination prevents leaks, is resistant to high winds and is long lasting. At the end of its warranty period, the roof is simply cleaned and recoated. There's no need for expensive tear offs. SPF waterproof roof coatings are a fraction of the cost of a typical rubber roof over the life of the building. 10 year warranty is perpetually renewable. SPF roof coatings can last 40 years and beyond.

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SPF roofing can last up to 40 years and:

  • is durable and resists wind and hail damage
  • won't blow off
  • will strengthen the building structurally
  • its closed cell structure confines damage and resists leaking unless damage penetrates the full layer of roofing
  • adds very little weight
  • will fill low spots and help redirect water
  • can be applied over most existing roofs, reducing construction waste

SPF roofing over EPDM rubber roofing.

Energy Savings

This is a roof we covered four years ago in the East Village. The owner now turns the heat on an average of 15 days each winter.

The cost of the SPF roofing system generally pays for itself within the first warranty period. They do this, in part, by reducing the amount of heat absorbed by the roof and transmitted into the building by fasteners and insulation gaps in the construction.

SPF costs less to produce than many other building materials. Very little waste is left over from an application of SPF. A typical 10,000 square foot roofing project can produce more than ten cubic yards of waste. The SPF project generally produces about one-half cubic foot of waste.

Lower your energy usage and costs every month with an SPF Cool Roof. This is a roof we did near downtown Des Moines.

How does SPF reduce energy costs? The SPF roofing system completely covers the roof deck. This provides a continuous surface that covers all points where heat might be transmitted into the building's interior. SPF roofing systems are typically light in color and have reflective coatings. The R-value of the insulation is 6 to 7 per inch.

Des Moines Area Projects

SPF roofing over metal roofing.