A Richardson Roofing Certified Professional is trained and tested to inspect, collect, evaluate and calculate all the necessary data to achieve maximum performance from your entire roof system. It’s not just a roof, it’s the umbrella over your home, business, and possessions. Each building is unique in design and construction. To achieve the longest life and most efficiency from your roof, each roofing solution should be designed with products appropriate for that unique roof system. It’s essential that you have a durable roof covering as well as balanced ventilation and adequate insulation. Only a trained and experienced roofing inspector or estimator of roofing systems has the necessary knowledge of newly developing products and methods to prescribe the best solution for your home.
Ventilation is crucial to the life and effectiveness of every roofing system.
Attic ventilation is an important part of roofing. Proper attic ventilation extends the life of a roof and reduces problems because it minimizes the temperature differential between the attic and the air outside. Proper ventilation will remove moisture and heat from the attic. Trapped heat and moisture can raise energy costs, cause ice dams, and damage roof system components as well as structural and personal items located inside the attic where temperatures can easily reach 150° F (65° C). Condensation that forms inside attics can be caused by the use of washing machines, dish washers, bath tubs, showers, and tumble driers unless these items are properly ventilated through the roof. In some cases the condensation can be bad enough to be mistaken for a roof leak.
Here are some problems associated with an improperly ventilated attic space.
Sumps between rafters (deck deflection) can happen because after awhile (sometimes several years, sometimes only a couple years), a plywood roof deck can warp or deteriorate and become spongy and dangerous to walk on. This occurs because one side of plywood decking needs be able to “breathe” by being exposed to circulating air. The adhesives used in the plywood can deteriorate or Dry Rot can occur because of condensation.
Water vapor will condense first on anything metal inside the attic; this will eventually cause the metal to rust. Heads can rust off nails, metal plumbing straps or straps holding HVAC ducting can rust in two causing the ducting to crash down on top of the ceiling joists or through a suspended ceiling. This problem is more common in humid climates.
In colder climates – generally where the average January temperature is 32° F (0° C) or colder – high inside humidity (40% or greater) combined with low outside temperatures can cause frost to form on the bottom of the roof deck.
Insulation can trap moisture which will reduce the R-value of the insulation and create a nice environment for the propagation of certain molds, spores, and fungi which will also cause problems.
There is also the problem of mildew which is both damaging and can cause health problems.
The roof system itself will deteriorate prematurely.
Cooling units will need to be serviced or replaced prematurely because of excessive use.
Ice Dams – ice dams are the result of melting snow continually refreezing at the roof perimeter and then backing up under the shingles and causing leaks. Proper ventilation used in conjunction with heavy insulation and an air barrier can create a Cold Roof Assembly which will help eliminate ice dams.
Insulation becomes more important to home and business owners with each passing season. Whether to keep out the cold or keep the cool in its place, maximizing R values can pay for itself many times over the life of a building.
A material’s R-value is the measure of its resistance to heat flow. It is important to know the R-value because many states or regions require that a roof system have a minimum amount of thermal resistance on commercial, industrial, and/or institutional buildings. The way it works is simple: the higher the R-value, the more the material insulates.
Richardson Roofing estimators can offer a dizzying array of products to button up your building in every location, bringing you the greatest value and efficiency.