Some roof problems are minor. They are localized and fixable. However, some problems tell you that the whole roof is about done and that it is time you replaced it.
For example, if you have an asphalt shingle roof, then the shingles themselves are a useful source of information here. How do they tell you that you might need a new roof?
1. Shingles Have Changed Shape
Shingles should slot together smoothly and lay evenly. You need flat coverage to get the protection you need on your roof.
If you look at your shingles and notice that they are no longer lying flush and have changed shape, then this is often a sign that they are failing. For example, if you can see that the edges of some shingles curl up rather than lying flat, or if they look buckled in the middle, then you know that they have started to weather.
When this happens, the shingles can't provide adequate protection any longer. Rain can get in under their edges and give you problems with damp and internal leaks.
While you may be able to fix one or two shingles to solve the problem for now, you probably need to replace the whole roof if the problem is widespread. Things will only get worse if you leave things as they are.
2. Shingles Have Fallen Off
It's not unusual to lose the odd shingle here and there over the years. You may have already patched up some gaps on your roof.
However, if you start to lose shingles regularly, then this can be a sign that the roof is coming to the end of its useful life. It's worth switching it for a new one.
This also gets your roof looking good again. It's virtually impossible to match new shingles with older ones that will have weathered and changed color. If you lose too many individual pieces and replace them with new ones, then your roof will look patched up.
3. Shingles Have Lost Granules
Roof shingles contain surface granules. These particles help protect the shingles from weather conditions like rain and UV rays. If shingles lose a lot of their granules, then they become more vulnerable. They aren't likely to last much longer.
So, if you see a lot of granules on the ground or in your gutters, then you might need to start planning a new roof. For more advice on your options, contact a roof replacement service.