Inverted roofs, aka upside-down roofs, buck the traditional design of most commercial roofs. They come with a number of benefits like improved thermal regulation, UV protection, imperviousness to the freeze/thaw cycle and excellent durability.

How does an inverted roof work? 

Normally the insulating layer lies beneath the waterproofing layer. However, in an inverted roof, these layers are switched around so that the insulation sits atop the waterproofing layer. The insulation is pretty light so to keep it from floating or blowing away, a heavier layer called ballast is added to hold it in place. Ballast usually consists of stones, gravel, pavers, or even plants or a garden. This type of roof confers a number of environmental and cost-saving benefits. Here are just a few.

 Inverted commercial roofing benefits

• Better thermal regulation

• Exceptional durability

• More environmentally friendly

• Quick installation

• May be possible to install over an existing roof

• Unaffected by freeze/thaw cycles

• Waterproofing layer is better protected

• Can withstand roof traffic

• Great UV protection

One form of inverted roof people tend to be most familiar with are green roofs. Vancouver has a number of these, for example, the Vancouver Convention Centre, the Vancouver Public Library, the Olympic Village neighbourhood, and more! 

Because of the sheer number of benefits of inverted commercial roofing, Vancouver building owners investing in this type of roofing will enjoy lower maintenance costs and a much longer life expectancy from their roof–30-50 years–compared to more traditionally styled roofs. Inverted roofs have much better stormwater management as well, which is increasingly important considering the bomb cyclones and atmospheric river weather events we're now getting.

To find out if your building is a good candidate for a new inverted roof, or one installed over an existing roof, consult with a professional roofing company who is experienced with this type of roofing.

Laurentian Roofing contractors are the experts! Our team can install your new inverted roof and you will never know we were even there. Contact us today at 604-345-7663