Reflective Roof Coating FAQs
Energy Star Radiant Barrier Roof Coating
for energy conservation and heat & light reflection
WHAT IS LO/MIT-I?
The name LO/MIT stands for low emittance. It is a silver colored, non-thickness dependent, highly reflective, low “e” (emissivity) coating. When applied to roofing substrates, LO/MIT-I raises their surface reflectivity to 80-85% and lowers their surface emissivity to.210-0.250. LO/MIT-I is a certified Energy Star roof coating.
HOW DOES LO/MIT-I WORK?
LO/MIT-I works by affecting the way the roof interacts with two portions of the electromagnetic spectrum. First, LO/MIT raises reflectivity in the visible, lowering roofing skin temperatures. LO/MIT also changes the emissivity of the surface where it is applied. The lower emissivity allows the roof to re-radiate its heat more slowly, greatly reducing expansion/contraction stress and extending roof life. The combination of a high reflectivity and low emissivity characteristics allows for a roof that helps to control air conditioning loads and lower internal temperatures while adding valuable years of serviceable life to the assembly.
WHAT SUBSTRATES CAN LO/MIT-I BE APPLIED TO?
LO/MIT-I may be applied to just about any exterior roofing substrate. All metals, rubbers, built-up and asphalt, single-ply, modified bitumen, most foams (test foam roofs for compatibility) as well as gravel and ballasted roofs. LO/MIT-I’s extreme flexibility and superb adhesion allows for simple application without primer on most roofing materials.
WHAT SURFACE PREPARATION IS REQUIRED?
Typically, the only surface preparation needed for application is a good pressure wash to remove dust and debris from the roof. Rust areas must be abraded and primed and leaking areas must be sealed first. LO/MIT-I is NOT a sealant.
HOW LONG WILL IT LAST ON MY ROOF?
Depending on the particular climate, LO/MIT should last between 10 and 15 years before needing a re-coat. Every building environment is different.
WHAT COLORS DOES IT COME IN?
LO/MIT-I is formulated specifically to mimic the optical and thermal properties of aluminum foil. So it will have a bright, reflective, silvery appearance. LO/MIT-I should not be tinted or over-coated.
MOST ROOF COATINGS HAVE HIGH E, WHY SHOULD I USE LOW E?
Because most roof coatings use organic materials, they tend to have high emissivity values. While this helps cooling the roof after the sun has set, having higher emissivity values subjects the roof to very quick swings in surface temperatures that tend to degrade it more quickly. Low emissivity characteristics, like LO/MIT-I has, allow the roof to re-radiate its stored heat more slowly, reducing the thermal stress and extending roof life. For roof top surfaces, reflectivity in the visible part of the spectrum is most critical at driving down the initial roofing skin temperature. Emissivity characteristics are secondary and the benefits should be weighed depending on the structure, the climate and the preferences of the building owner.
HOW DO I MAINTAIN LO/MIT-I?
It is generally recommended that the roof be inspected at least twice a year and after any major storm or high wind event. If the roof has been damaged, recoat may be required in any patched areas, however normal wear and tear is expected to erode the coating slowly over time.
WILL LO/MIT-I STOP MY LEAKS?
No. While, LO/MIT-I may seal some microscopic holes, it is not designed to be a sealant in any way. Any known roof leaks should be patched and repaired before application of LO/MIT-I.
IS THERE A WARRANTY?
Yes. SOLEC offers a 5-year replacement warranty for product defects of LO/MIT-I. Please contact the factory for more information.
MY ROOF HAS PONDING ISSUES. WILL LO/MIT BE AFFECTED?
No. LO/MIT-I will be unaffected by standing water (as long as the roof is completely dry for the initial application), however it will not address any ponding or drainage issues that may be present. LO/MIT-I’s silicone polymers may help less dirt to accumulate on the roof.
HOW MUCH CAN I SAVE?
Because of the many varied climate zones, and uses of the product, combined with myriad building styles, roofing assemblies, insulation and HVAC packages, not to mention utility rates, savings can vary significantly from structure to structure. Some buildings that may not be conditioned at all can still benefit from the technology because of the increased comfort felt by inhabitants below.
WILL A SECOND COAT HELP PERFORMANCE?
No. One thin coat is all that is required for optimal performance. A second coat will not increase efficiency or have a noticeable affect on lifespan.
Disclaimer: this video was produced in 1998 and, as such, uses an out-of-date Energy Star logo in reference to rooftop applications. Please visit Energy Star to learn more about the program or click here to see LO/MIT-I’s Energy Star rooftop certification.