Low Volume Roof Cooling

Up to 6 12 roof pitch use the standard formula as explained in this article.

Low volume roof cooling.

Because the incremental cost of cool roofing is low it s a relatively inexpensive and sensible product to specify in those climates. White roof aka cool roof pros. Cool roofing can reduce energy use in some but not most u s. Because it is designed to provide gentle water distribution over a large area it is a perfect means of keeping your landscape green and lush.

This cooling reverses the heat flow through the roof. It makes the most sense for homes with low levels of insulation and for homes with ducts in the attic. On a hot summer day it will even provide natural cooling no need for an air conditioning system. 7 12 to 10 12 roof pitches increase the amount of ventilation by 20 percent.

Although costs will vary greatly depending on location and local circumstances cool roof coatings on a low slope roof might cost 0 75 1 50 per square foot while single ply cool roof membrane costs vary from 1 50 3 00 per square foot. This effect creates an effect equivalent of r 7 roof insulation during the day. Here s a rule of thumb to follow. Tesla s design for low profile solar roof tiles photograph.

Re cover the roof with a new waterproofing surface such as tile coating replace the roof with a cool one. They can quickly remove a larger volume of hot and or humid air from your attic compared to static ventilation which helps save money on your heating and cooling costs. Heat is now transferred out of the building through the roof. A rooftop sprinkler system is not just for fire protection.

One criticism of cool roofs is that the benefits of cooling in summer can be outweighed by an increased demand for heating in. Cool roof requirements are based on the roof s slope with more stringent requirements for low sloped roofs which rise less than 2 feet 0 6 meters in height for every 12 horizontal feet 3 7 meters than for steep sloped roofs which rise more than 2 feet 0 6 meters in height every 12 horizontal feet 3 7 meters source. An evaporative roof cooling system is designed to reduce the temperature of a roof from 165 f to about 90 f. This reduces summer energy bills and helps deter the heat island effect in cities.

If you want to convert an existing roof into a cool roof you have three basic options. They are typically easier to install and won t detract from the appearance of your roof. Generally as the roof pitch increases the volume inside the attic also increases along with the amount of needed attic ventilation.