Ways to Cool a Flat Roof

The drawback to the flat roof on your home is its tendency to trap heat. Learn about how to make your flat roof reflect heat efficiently below, guided by a Miami Roofing Repair expert;

Roof Coatings

Specialized roof coatings can help a flat roof to reflect up to 90% of solar heat. The materials includes an elastomeric paint, an asbestos film shield, large polyvinyl chloride (PVC) sheets that has heat-sealed seams or even a thin layer of solar panels that can collect solar energy without any increase in the indoor temperature of your home.

Elastomeric Paint

Elastomeric paint contains elastomeric polymer which allows it to expand and contract together with the material on which it is applied. Two coats of bright white elastomeric should be added to your flat roof in order to increase its solar reflectivity.

PVC Sheathing

A single-ply PVC sheathing should be applied to the whole surface if you have a roof that is structurally sound. Reputable installers and manufacturers of PVC sheathing can also help you in upgrading your roof in the future using suitable flashings and vents for fireplace chimneys or skylights. A good PVC sheathing will be warranted to last 15 years in different weather conditions.

Asbestos Film

Another option is to erect an asbestos film shield that is low-sloped over the flat roof. This will increase solar reflectivity, thereby, preventing the roof from absorbing heat and lightg energy. Make sure you construct it in a way that it will not catch prevailing winds and blow away.

Solar Photovoltaic Roofing Panels

Ultra-thin, solar photovoltaic panels can also be added to your flat roof. These panels will store energy for you for usage in your home, and then send back excess capacity to the local power grid.

Other Options to Cool Your Flat Roof

It is not every solution to this problem that comes in form of a roof covering. The following ideas of cooling can also be considered.

Foam Insulation

Install a layer of solid foam insulation directly under your flat roof, if you can afford to replace your ceiling. It will keep out both cold and heat, thereby, improving the energy efficiency of your home.


You can install wind-catchers in the roofing so as to direct cool air downward. Windcatchers haved onion-shaped dome with almost-vertical vanes which will turn even in slight breezes. This vanes force cooler air down a shaft into the home.