ROOF COATINGS
Frequently Asked Questions
We have found that for Steel roofs that Inland Coatings work best as they have an elongation of up to 500% so that they can expand and contract with the movement of the Steel. As well, we don't need any primers and we can apply this over rusted steel after carefully preparing the steel roof. For Flat Tar and Gravel roofs we have some other coatings we use to help extend the life of Flat roofs but it is only a short term solution.
In our experience coatings work best on Low Slope Metal roofs such as a Butler roof. We have done several small residential steel roofs that are low slope on trailers, sheds, cottages, homes etc with great success. As well, we have completed commercial project on such projects such as Municipal buildings and RV dealerships that wanted to extend the life of their existing roof that didn't have budget to retrofit it with a membrane.
For Steel roofs we can offer up to a 2 year Workmanship Warranty. The manufacture can provide up to a 10 Year Material Warranty. For Flat roofs there is no real warranty as we use coatings only for repairs.
Installing coatings are best left for the professional who understand the preparation involved and the thickness to apply the coatings.
Coatings can be applied with paint brushes, rollers, and with spray equipment.
For Inland coatings no primer is required for Steel roofs. For Flat roofs a primer is required.
While coatings may potentially stop minor leaks, the roof should be properly repaired and dry prior to coating application. If the roof is actively leaking, McKay Roofing will inspect the roof to identify the issue and repair prior to the coating installation.
Yes, new roof can and should be coated if the building owner wants a highly reflective roof coating to reduce energy costs, and peace of mind against future leaking issues. McKay Roofing Coatings will also extend the roof's service life. Reflective roof coatings can reduce the heat load on the roofing assembly and save on wear and tear from over used roof top HVAC units.
Performance can vary depending on coating type roof and weather conditions, as well as the coating film thickness at time of application. The thicker the coating, the longer is lasts. 5-10 years would be a reasonable life expectancy depending upon what coating options are used. If we are coating the complete roof with 3 coats you be closer to 10 years plus.
All roofs should be designed and built to have positive drainage and not allow long term ponding water. We would suggest discussing these concerns with your McKay Roofing representative.
For Flat roofs we can use a coating that can be applied in colder temperatures. For Steel roofs its best to wait until temperatures are between 40-110 degrees F.
That depends on many factors: air temperature, wind, roof surface temperature, and relative humidity. Generally speaking we can apply 2 coats in one day depending upon the size of the roof area.
Rusted Metal roofs can be coated after the rust and corrosion have been addressed. We generally power wash the roof and wire brush any severe areas of rust.
It is recommended that the roof, including the coating, be inspected annually and after it's gone through a winter. Additional coating may need to be applied to repair damage to the coating and underlying roofing substrate, depending on the nature of force the roof coating endured from flying debris or ice damage.
If you are looking for a longer term solution for your Low Sloped Steel roof we have a great option that can extend your roof 20+ years with warranties up to 20 years. This solution is much less expensive than replacing the existing Steel. Our solution is to have insulation pre-cut that will be installed between the ribs on your steel roof. We then will mechanically fasten insulation over top of this into the perlins. This will allow us to mechanically fasten a TPO environmentally friendly white membrane over the top. We will also roof any curbs or mechanically units or penetrations on your roof as well. This solution has proven to be very effective for building owners and not only extends the life of the roof at an economical cost but will reduce your energy costs due to the extra insulation as well as the reflectivity of the white membrane. Contact McKay Roofing for a consultation on your roof.