The first tell tale sign is that you've got ceiling spots, which are simple water stains. They are persistent small stains that are caused from a roof leaking. This can grow into a much worst issue if it isn't patched quickly. Roof repair is an important step in maintaining the home and should be taken seriously.
If your roof is rotting, it is important to fix immediately as well, as the reliability of the roof is compromised to a very serious degree, however often home owner's misty algae for roof rot and panic. If you have simply algae on your roof, there is no need to contact a roofing company at all; however, if it is roof rot, you will usually have to replace the entire roof.
If the roof has leaks and blistering it is important to contact roofing experts, sometimes blistering can be a quick fix but if it is coupled with leaks, the roof can be a hassle to fix, often they'll simply recommend a new roof altogether. This is why it is important to commit to a roof company and get your roof repair on its way as soon as possible.
Safety is no small comfort when you are a homeowner, and a roof caving in on you can be a real nightmare, so be sure to contact a professional when you see any of these signs, and keep your home in tip top condition. It might cost you a lot depending on your situation, but the comfort that can come from a repaired roof, is one that exceeds any monetary amount.
Mike Rogers owns MW Rogers Construction which is a Houston roofing contractor that also does Houston residental construction.