During the course of renovation of the Wells Fargo Bank in Grand Forks, ND and adjoining property owned by the bank, it was discovered that there was mold and mildew on the wooden joists in these old buildings that would lead to ongoing indoor air quality problems if not dealt with in some fashion. The presence of mold and mildew was not a surprise as these buildings were vacant since the Grand Forks flood of 1997. Consideration of available options led to a decision to spray the affected areas with a biocide and then to encase all of those areas. Some of the more minor building components were demolished and replaced, but this was not effective for these weight bearing structural members.
The Safe Encasement System, consisting of SE-110 penetrating-stabilizer (primer) and SE-120 protective skin (topcoat) has been tested and found not to support the growth of mold and mildew (ASTM D3273, D-3274). The use of the primer allows for coating over surfaces with little or no surface preparation. The topcoat yields a surface that can be warranted for up to 20 years. This method of dealing with the problem protects against the re-development of mold and mildew problems for many years to come, and yields a washable surface so with some degree of cleaning, future dirt buildups can be removed before mold and mildew growth occurs.