Commercial Roofing Coatings

We do Steel, Flat, Modbit, EPDM, TPO, Ice Guards.

What Coatings do we use?

We have found that for Steel Roofs, 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.

What Kind of Roofs Can be Coated?

In our experience coatings work best on Low Slope Metal Roofs such as Butler Roof. We have done several small residential Steel Roofs that are Low Slopes on trailers, sheds, cottages, homes etc with great success. As well, we have completed commercial roofing projects on such projects as Municipal buildings and RV dealerships that wanted to extend the life of their existing commercial roofing but didn’t have the budget to retrofit them with a membrane.

How Long will the Coatings Last?

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.

Do I need a commercial roofing contractor, or can I do it myself?

Installing coatings is best left to the professionals who understand the preparation involved and the thickness to apply the coatings.

How is the coating applied?

Coatings can be applied with paint brushes, rollers, and with spray equipment.

Do I need a primer?

It will depend on the commercial roofing type. For Inland Coatings no primer is required for Steel Roofs. For Flat Roofs, a primer is required.

Will the coating stop my leaks?

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 it prior to the coating installation.

Should I coat a new roof or nearly new roof?

Yes, a 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.

How long will the coating last?

Performance can vary depending on the coating type roof and weather conditions, as well as the coating film thickness at the time of application. The thicker the coating, the longer it lasts. 5-10 years would be a reasonable life expectancy depending upon what commercial roofing coating options are used. If we are coating the complete roof with 3 coats would be closer to 10 years plus.

Can a coating stand up in ponding water conditions?

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.

In what weather conditions can the coating be applied?

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.

How long does the coating take to dry/cure?

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.


Can I coat a rusted metal roof?

Rusted Metal Roofs can be coated after the rust and corrosion have been addressed. We generally power wash the commercial roofing and wire brush any severe areas of rust. See the examples of rusted roofs that have been completed with the Inland Coatings link here

How do I maintain the coating?

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 nature of force the roof coating endeavored from flying debris or ice damage.

Retrofitting Low sloped Steel Butler Roofs

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 mechanical 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.