Spray foam roofing, also known as SPF roofing, is a popular option for commercial and
industrial roofs due to its high insulation value, energy efficiency, and durability.
However, it also has some disadvantages, particularly in the harsh climate of the
Canadian Prairies.

Some of the disadvantages of a spray foam roof on the Canadian Prairies include:

1. Temperature Limitations: Spray foam roofing is sensitive to temperature
fluctuations during installation, and the ideal temperature for installation is between 15°C
to 26°C. In the Canadian prairies, temperatures can drop below freezing during the winter
months, which can make installation challenging or even impossible. Additionally, high
temperatures during the summer months can cause the foam to expand and contract,
leading to cracks and other forms of damage.
2. Moisture Issues: If not installed correctly or maintained properly, spray foam
roofing can be prone to moisture issues, which can cause significant damage to the
underlying structure. In the Canadian Prairies, with the frequent temperature changes and
harsh weather, moisture can become a serious issue. Moisture can enter the foam through
cracks, gaps, or other vulnerabilities, leading to mold growth, rot, and other forms of
water damage.
3. UV Degradation: Spray foam roofing is vulnerable to UV degradation, which can
cause the foam to break down and lose its insulating properties over time. In the
Canadian Prairies, where there is a lot of sunlight and UV radiation, this can be a
significant concern. Without proper protection, the foam can become brittle and crack,
which can lead to leaks and other issues.
4. Wind Uplift: The Canadian Prairies are known for their strong winds, which can
cause damage to spray foam roofs if they are not properly secured. Even though spray
foam roofing is relatively lightweight, it still requires proper attachment to the underlying
substrate to prevent wind uplift. If the foam is not properly anchored, it can be lifted and
displaced by high winds, leading to damage to the roof and the underlying structure.
5. Maintenance Requirements: Spray foam roofing requires regular maintenance to
keep it in good condition and prevent issues such as leaks and moisture infiltration. This
can be a challenge in the Canadian Prairies, where access to roofs can be difficult due to
the harsh climate and high winds. Additionally, maintenance may require specialized
equipment and expertise, which can increase costs.
6. Cost: Spray foam roofing can be more expensive than other roofing materials,
such as asphalt shingles or metal roofing. This can be a significant disadvantage for
building owners and managers who are operating on a tight budget. While spray foam
roofing can offer long-term savings in energy costs and maintenance, the upfront cost can
be a barrier for some.
In conclusion, while spray foam roofing has many benefits, it also has some
disadvantages, particularly in the harsh climate of the Canadian Prairies. Building owners
and managers should carefully consider these factors before choosing spray foam roofing
and should work with a qualified and experienced contractor to ensure that the
installation is done correctly and maintained properly over time