Ventilation is an extremely important part of the roofing system. It is sometimes overlooked, but it’s just as important as the roof itself. Choosing the right kind of ventilation for your home is crucial. Please ask about the different systems that will work on your home.
Without ventilation a home will be very hot in the summer causing high energy bills. Insufficient ventilation can cause fasteners to back out puncturing through composition shingles and allowing tiles to fall off.
In the winter time the attic will condensate without proper ventilation. Condensation will accumulate on the underside of the decking. The moisture will seep into the wood, eventually causing the decking to rot and warp under the weight of the most common roofs. When this happens it looks like the roof has waves on the surface. The only way to fix warping is to replace the entire system including the decking and update the ventilation system. It’s important to understand that simply re-roofing will not hide this. In most cases it will magnify the effect.
Every roof must have an intake and exhaust, as well. Typically the intake is on the soffit and should be spaced out every 10 to 15 feet. The exhaust is going to be on the surface of the roof, either low profile, mechanical or ridge vent.
All roofers must follow the International Residential Codes (IRC) in your city*. Each city has their own adoption of these codes and may also add to them.