It's not something that any homeowner ever wants to think about... replacing an entire roof, but for some people it is a reality. Years of neglect and a huge build up of contaminants on a roof of any kind is not an ideal situation and in some cases will require costly repairs or even a full replacement. This isn't always the case and sometimes you might just catch it in time, and your new roof cleaner is going to have a huge job on their hands.
The fact is that it can cost upwards of $10,000 to replace the roof of a home and you will likely need to find somewhere for you and your family to stay for a few nights while your home is roofless. It isn't surprising that the cost of replacing a roof is so high given the huge amount of manpower involved. Generally the repair company will hire a crane or equivalent to do the heavy lifting, then there is the ridge capping, mortar replacement and a full replacement of materials.
So say you catch a roof issue in time and you don't require a full replacement, instead just repairs. Depending the issue you've got yourself you could be looking at the same cost as a full replacement just in repair costs.
Common problems caused by lack of maintenance are:
As we don't often take note of what our roof looks like because we rarely take a visit up to the roof, it is still something that we should be doing every year or so. If you can see your roof quite comfortably from the ground you should be able to see if there is any noticeable contamination.
Look for things like moss, lichen, mould or spots of discolouration. These are telltale signs that you need to call in a professional. Not all contaminants can be seen and can be building up underneath the tiles, so if you're seeking out regularly yearly maintenance your roofing specialist will be able to check for any hidden nasties for you.
Don't let a $100 job turn into a $10,000 job. Make the call and get yourself some professional advice.