Spray Foam Flat Roofs
The spray foam roofing is spray applied into a tough seamless membrane that can be walked on. Typically spray foam roofs are applied at 1.5″ thick using a 3# closed cell roofing foam that seals the roof against all leaks. The spray foam can be built up thicker in low areas of the roof to reduce ponding water and enhance drainage. The result is a watertight roof system that is sustainable and offers superior protection from leaks.
Benefits of Spray Foam Roofing
Conserves Energy – Spray foam roofing offers the lowest thermal conductivity of any commercial roof. Spray foam roofing also has the highest R Value of an other roofing system available. In addition, there are no fasteners that cause thermal bridging (energy loss).
Light Weight – Spray foam roofing has a high strength-to-weight ratio, this makes polyurethane foam an ideal product for roofing and re-roofing of existing structures.
Easy to Apply – Spray foam can be applied with 2-3 workers, limiting the noise and disturbance. In addition, it speeds up new construction and minimizes exposure during reroofing. Spray foam can often be applied directly to the existing roof, eliminating the need for costly tear offs.
Monolithic – The spray foam is fluid applied in a seamless blanket of insulation it seals cracks and holes while insulating the roof deck from exterior temperature extremes, thus removing the typical expansion and contraction problems typically associated with other roofing systems.
Self-Adhering – No special adhesives or mechanical fasteners are required. Spray-applied polyurethane foam offers excellent wind uplift resistance that meets and exceeds stringent requirements.
Self Flashing – Spray-applied polyurethane foam is self-flashing around stacks, vents, ducts and other objects.
Extended Building Life – By insulating the roof deck from ambient temperature extremes, damage due to thermal expansion and contraction is eliminated.
Sealing your roof with spray foam eliminates the heat transfer though the metal before it enters the building. The metal can no longer expand and contract extending the life of your building. Customers can observe the very next day that something has dramatically changed on their building after foam has been applied.
Metal has very high conductivity meaning that high heat or cold will transfer into the roof, making your insulation less effective against higher temperature extremes. This is especially true in the summer months with ambient temperature heating the roof as well as sunlight beating down on it. It is not uncommon to see galvanized metal read temperatures of 150 F on a sunny 85 degree day. The rate of expansion and contraction on metal is higher than other materials, in fact a metal sheet that is 120′ long can expand and contract more than 1″ throughout the year. Due to the heat, the rubber seals used on the fasteners break down and eventually the roof will leak.
With spray applied foam you can see a decrease in your energy bill of 20-30%, after five years or less it could pay for itself in heat and A/C savings alone.
Foam with decrease expansion and contraction of your metal buildings and prolong building life.
Tired of leaks year after year on your tar and gravel roof, even when a contractor has come in to repair it, only for another leak to show up somewhere else?
Once a BUR system has water in it, not only is some of the roof insulation being depleted but the moisture has no where to go. Because there is a vapor barrier on the underside of the roof deck, the moisture has nowhere to go but up.
This is why tar and gravel roofs will show blisters in the tar. Most conventional roofers will want to tear the roof off at this point and install a new roof system. This is labor intensive, disruptive, costly, and a waste of material that was still for the most part doing its job. Why not retain the insulation you have and add more?
First all of the ballast is removed from the roof. This will reduce the load on the building. Next the original tar membrane is punctured and roof vents are installed to allow the moisture in the deck to gas off. The roof then gets 3lb density roofing foam sprayed over it, foaming the vents in place. This foam has a 50 PSI compressive strength so not only can it be walked on, but it also adds strength to the roof deck. Finally a membrane is sprayed over the foam to protect it from the elements.
The final result is a completely sealed, better-insulated roof deck.