The biggest roofing killer is the age of the materials. When shingles begin to look worn this usually means they are. Even shingles that have a 40-year warranty should be checked every few years. Roofing contractors will perform a relatively inexpensive check up of the whole of your roofing and if you pick a reputable company they will tell you exactly what needs repairing now and what is likely to need repairing in the future.
Repair or replace.
Sometimes shingles can be blown off and merely need replacing but if this is happening more and more often you need to consider that they may need replacing. Repairing your roofing may cost less but if you have to repeatedly repair it then it is a much more cost-effective solution to have new roofing. A contractor will be able to help you assess the best option for your roof.
Roofing is the thing that protects the rest of your home from the elements and the damage they can cause. As such your roofing is facing this damage itself and it should be given all the ammunition possible to complete its job. Shingles are available in a wide variety of sizes and costs, but the cheaper shingles are virtually useless and you should spend as much as you can possibly afford on buying top quality roofing shingles that will stand up to more than a light shower and a gentle breeze.
Cost of re-roofing.
Having new roofing costs money, but by continually paying for repair work to be done you should consider that there may be an underlying problem with the wooden sheathing underneath. The only way to tell whether this is the case or not is to have the old roofing shingles completely ripped off and have the underneath inspected and repaired properly. Once this is done you can pay for top quality roofing that may set you back a little more than the repair work would have done but will undoubtedly last you much longer. That said, if a shingle blows off during high gales there is no need to rush out and have your entire roofing replaced without seeking advice first.