Even with the best maintenance practices, there comes a time when the roof gets past its useful life, where repairs cannot help, and replacement is the only viable solution. All the roofing materials have a life span. For example asphalt shingles will last between 15 and 30 years. Metal shingles can last for about 50 years.
Generally, even the best roofing material will be in need of serious repair replacement after 50 years or so. Before this period, there will be need of minor repairs due to the normal tear and wear. Failure to replace the roof can lead to bigger problems such as the roof getting blown off by wind, unsustainable levels of moisture in the interior of the house, and general weakening of the overall structure of the building.
When it is time to replace the roof?
Unless in the emergency situations, there are clear telltale signs that you need to replace roof in the near future, and these include the following –
- Cupped shingle tabs or curled shingle edges.
- Bald spots in areas with missing granules.
- Cracking of the shingles.
- When asphalt shingles get past 20 years life span. Note that proper installation of the shingles is important in maintaining or prolonging their life span. If they are not properly installed, they may even need replacement before the 20 years lifespan.
- If most of the homes that are built around the same time as yours have replaced their roofs. Homes that are built at almost the same time and within the same environment, exposed to similar weather conditions, will need replacement at almost same time.
- When the roof looks old, fade and worn out.
- Dark streaks:
When you notice some dark streaks on the roof decks, then it means airborne algae has developed on them. Although this may not have serious negative impact on the shingles, then it makes them have some ugly look. If you notice any algae streaks, you may assume the risk of scaling the building up to the roof and then physically cleaning it, or you can hire an expert roofing company to do the job.
A mixture of bleach and water in the ratio of 50:50 will remove the algae streaks. If you feel that you cannot go up the roof to clean it, then you may become a bit innovative and use the common low-volume garden hose for knocking off protective granules from the shingles. Note that the bleach can cause other damage to both the interior and exterior parts of the house and so you may need to cover the most vulnerable areas and objects with polythene and other materials.
- Growth and development of moss:
The growth of moss happens in places which do not get sufficient light of the sun. This means the moist and cool areas on the entire roofing structure will de lop moss, and the leading cause is leaks in the roof. When you notice growth of moss, you need to have the roof inspected by an expert, so the possible areas of water leaks can be identified. Important to note is that not every case of growth of moss means you need to replace roof .A simple leak can be addressed by repairing the hole or opening in the roof.
How much will it cost?
This is always an important consideration for anyone who wants to replace roof. Well, the cost depends on many factors, the most obvious behind the size of the building. Larger roofing space will cost more. Also obvious is the type of roofing material used. Shingles, the most commonly used roofing materials are now very expensive, but here are sub-types within them and at varying prices. Generally, the most durable roofing materials will cost you a bit more.