Depending on the weather where you live, the ideal roof construction for your home could be drastically different. No matter the location, adequate ventilation in the roof is one of the prime factors for roof longevity. Most people think of the roof as just a solid plank on top of your house. However your roof houses insulation and is often connected to an attic or crawl space. Without ventilation the interior of the roof will build up moisture which can lead to a variety of problems.
Water is the largest threat to a roof. In warm weather, poorly constructed roofs build up water which causes mold, mildew and rotting damage. In the cold, ice buildup in the vents can pry off shingles and cause water leaks. If you are contacting a Denver roofing contractor for new shingles, ask about your current roof construction and if there are any possible problems with it.
Proper roof design also lowers heating and cooling bills. Insulation in the roof provides these energy savings, however it must be protected. Over the course of a day, families generate water vapor from using home appliances. My Denver roofing contractor recommends all insulation be sealed so that water can not penetrate it. Water in insulation leads to rot and declined wood frames. This can lead to roof failure or the need for a replacement roof. The best counter is a properly ventilated roof.
As heat builds up in the summer, it pools in the attic where it can cause damage to shingle and raise cooling bills. Good vent placement should allow air to circulate naturally, but some roofs may need fans to blow out hot air. Ask your Denver roofing contractor what the proper placement is for your home. Roofs are a bit more complicated that they look to the eye, but they really only need a few basic things.
In the winter, ice can be even more damaging. Ice is actually more likely to cause roof damage than heat. The name for this damage is called an ice dam. As water leaks into roof vents and freezes it expanses and damages roofing materials. Holes in the roof cause a cycle of freezing and melting that increases holes and lets water run right down through your ceiling or interior walls. Because the attic is not air tight, water will get in. The only solution is venting that moist air out. Then insulate well to make sure your interior appliances like heating ductwork do not interfere with the roof and the exterior.