Most people think they have a good grasp of how roofs work – the shingles (usually asphalt) keep the water out, and that they do that by being the waterproof layer that stops water from getting in. That’s more myth than fact.
Another myth, is that caulking is an acceptable way to achieve waterproofing.
Another myth, is that if you have ice-and-water shield on your roof, you’re good.
What all these myths have in common is that they misunderstand how a sloped roof system works in reality.
There are several aspects to maintenance. Preventive activities look for possible weaknesses and starting signs of deterioration. Remedial activities repair or remediate things that started to fail. Replacement activities are appropriate when incremental repairs don’t do the job any more. Some of these activities can be easily done by the homeowners, others should be done by professionals. Let’s have a look at this in more detail.