Damage to your roof is caused by a number of factors, many of which you can prevent or control. Listed are a few of the more common causes of roof damage.Be sure to get a copy of our "Homeowners Guide to Knowing When It's Time For A New Roof" which includes a comprehensive checklist of things to look for and how to spot damaged spots.

• Ventilation is important - without it heat and moisture may build up and cause rot in the sheathing or rafters which then causes shingles to buckle and insulation to become ineffectual
• Adequate Insulation will protect the house from heat loss
• Sun and ultraviolet rays cause different deterioration rates to different materials
• Rain - can seep in and cause structural rot, moisture can cause mildew inside and out
• Wind can lift shingles allowing water to get in
• Snow & Ice - can cause back up and seepage into the interior of the roof
• Condensation - promotes the decay of wood in attic
• Moss & algea can lead to rot creates stains can be hard to clean etc
• Trees & debris - can gouge or tear shingles or can retain moisture which can lead to rot
• Missing or torn shingles - leakes and weakness can spread to nearby areas and progress quickly
• Shingle deterioration - worn, curles ot torn shingles lose waterproofing effectiveness or can be easily blown off
• Flashing deterioration - water can enter in the seam area of the roof causing damage and rot.