Roof coating is an important factor to consider when maintaining and repairing your roof. In the case of your roof acquiring wear and tear, roof coating is an attractive and cost-effective option instead of doing an entire roof replacement. There are various factors to take into consideration, such as slope, heat, UV rays, location, and exposure to chemicals. There are several types of coatings on the market and here we have broken down some of them for you.
Classes Of Roof Coatings
There are three types of roof coatings, namely solvent, water based and 100% solids. The solvent employs organic solvents which act as a carrier for the coating. Water-based coatings uses water as the carrier for the coating, and 100% solids are the solvent-free coatings.
Acrylic Roof Coatings
Acrylic is a cost-effective solution which is suitable for a variety of roofs. These are water-based and reflect sunrays, but will lose its mil thickness as it weathers. Acrylic roof coatings contain different types of acrylic polymer, which are designed to help elongate the coatings’ life and improve durability. This roof coating is durable yet cost effective.
Polyurethane Roof Coatings
Polyurethane roof coatings have two main types: aliphatic and aromatic. Aliphatic coatings are costlier but are UV stable, whereas aromatic coatings are less expensive but not as UV stable, which is why it is normally used as a base coating. Ideally, an aromatic base coat with an aliphatic top coat should be employed with urethane roofing. This will ensure durability, the roof will stay cleaner, and unlike an acrylic coating, the urethane roof is more resistant to ponding water.
Extra strength is added to this type of coating because it contains many types of organic and inorganic fillers and fibers. They require little material, as the coatings can be applied to approximately 1.5 gallons per 100 square feet. Easy application is also a plus with this coating, as a push broom can be used to sweep it on.
Silicone Roof Coatings
Silicone coatings can eliminate the need for a primer. These are moisture cured, and when exposed to humidity, can even promote their cure. Silicone coatings do not get brittle or hard, and weather better than other coatings. This type of coating does however hold dirt, and has resistance to tearing, which means that they should be used with fabric.
Solvent-Based Silicone Coating
This is arguably said to be amongst the best in roof coatings. As the silicone is a natural ingredient, the coating is bio-degradable. Application is versatile as the solvent-based silicone coating can be sprayed on or rolled on, covering from 2 to 3.5 gallons per 100 square feet. Two major advantages are found in this type of coating:
- It can resist ponding water for an extended period of time, and
- It does not need a primer in order to adhere to most substrates.
Thanks to these two advantages, solvent-based silicone coatings create the perfect balance between cost and efficacy.
Roof coatings are a great way to keep your roof in shape and to prevent and sometimes repair wear and tear. Acrylic roof coatings, as well as solvent-based silicone coatings are amongst the best in the business for any roof. It can however be a confusing project to tackle, so getting the help of roofing professionals such as ABC Roofing will only do you well and save you money.