Cooling your Roof on Hot Summer Months
Hot summer months can be very uncomfortable and it can also mean high energy bills trying to cool the whole family. The heat absorbed by a traditional roof during sunny days can easily raise the temperature inside the house. This contributes to discomfort especially if there is no air conditioning. Fortunately today, there are low cost remedies that will help cool the home and it is called a cool roof.
What is a cool roof?
What indeed is a cool roof? It is a roof which is designed to maintain a lower surface temperature compared to a traditional roof. Loosely, the term cool roof is used to describe any roofing surface which is cooler that your standard rooftop. So, how do you turn your roof into a cool roof?
Modified bitumen roof
One of the most common options for a cool roof is a low-sloped roof or a modified bitumen roof. Traditional bitumen roofs are gray or black and ha ea low solar reflectance. On the other hand, the modified bitumen roof is a membrane made up of sheets of rubberized or plasticized asphalt which are held together reinforcing fabric. There is a very slight difference in price between the two varieties of bitumen roof.
Single ply membrane
The single ply membrane is also another option. Single ply membrane are pre-fabricated vinyl or plastic sheets which have solar reflective coatings or materials. These sheets are rolled onto the deck and then attached to the structure. Some of the most common single ply membranes are ethylene propylene and polyvinyl chloride.
Built-up roofing is synonymous to the standard tar and gravel roof. It has a lot of advantages because it is easy to apply, easy to repair and inexpensive. Traditionally the asphalt and gravel used are dark in colour so that they can trap more heat and light than they release.
Cool roof coatings
You will have the best results when cool roof coatings are applied to low-sloped roofs which are still in very good condition. There are two types of coatings and they are elastomeric coating and cementitious coating. Elastomeric coatings contain polymers so they are less brittle and are more adhesive to surfaces. On the other hand, cementitious coatings contain ceramic particles or concrete. Both varieties of cool roof coatings improve the solar reflectance of the roof’s surface.
Cool roof coatings are sprayed, rolled and then brushed onto existing low-sloping or flat rooftop. They create a bright white surface which resembles that of paint. Both coatings are most commonly used for re-roofing projects.
Your choice of roofing cannot only affect the potential future value of your home; it can also affect the well-being of your family. Roofs which are made of flimsy materials will not last long and will not be able to protect your family and your property should there be extreme weather such as hurricanes.
Roofing decisions such as cooling your roof can also make your home a more comfortable place to stay in especially during months when the heat is almost unbearable.