There are two installation options when it comes to liquid-applied membranes: squeegee and spray application (which is generally used with coated-polyurethane-foam systems). Liquid applied systems are highly useful as re-covers for weight-sensitive applications, such as pre-engineered steel buildings. Coated-polyurethane-foam systems are excellent for adding insulating value to a re-cover roof and fixing slope-to-drain problems, and for those in more arid regions, they also have the benefit of being sensitive to humidity during installation.
PLEASE NOTE: If a silicone roof coating is used, the roof system is not sensitive to grease and oil emissions, as silicone is fairly inert.Squeegee-applied roof systems are mostly used to prolong the life of an existing smooth-surface roof. They are an effective, low-cost alternative to re-roofing but are not necessarily a permanent replacement. Newer, liquid-applied roofing systems can last as long as 10 years, but the roof has to be in fairly stable and dry condition when the new liquid membrane is applied.
There are several options available when undertaking a re-roofing project. Sorting them out before bidding is the best way to assure the most appropriate roof system is chosen for the building. A properly trained and knowledgeable roofing contractor can help differentiate the options.
If you are not currently working with a particular roofing contractor or feel uncomfortable having the same company both designing and installing your roof, an architect or engineer who specializes in roof consulting can sort out the best options and provide construction documents that allow you to bid out the work to the best contractors, knowing the roof system is optimized to fit your building.
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