It's a good idea to start planning your roof replacement before so much damage is done that your home has water damage from a leak. You can call a roofing contractor to check your roof and let you know if it's time to put on new shingles.

There are also signs you can look for yourself, even if you just look up at your roof from the yard. However, a close look at the shingles from the top of your roof is best, and that's why you may want a roofer to give your roof an inspection. Here are four signs that a roof replacement is needed.

1. Your Roof Seems To Be Sagging

If it looks like your roof is sagging, don't climb up on the roof because your weight might be enough to cause it to collapse. Sagging occurs when your roof has water damage and rot. The deck gets soggy and sags under the weight of the shingles. This problem will get worse, and it's a clear sign you need a roof replacement.

2. The Granule Loss Is Severe

Asphalt shingle roofing is covered in granules that protect the shingles and give them color. They wear off gradually as the roof ages, so when your roof is old, the granule loss can be severe. This might cause your shingles to look bald or dark.

Without granules to protect the shingles, UV damage escalates, so it's good to have a roof replacement done when your roof looks old due to granule loss.

3. The Shingles Show Signs Of Wear And Damage

Asphalt shingles can curl up, crack, work loose from their nails, get blisters, have nails pop out, or get moldy from water damage. These signs make your roof unattractive and more vulnerable to storms. When your roof has widespread signs of aging, it's time to think about a roof replacement so you can schedule the work at a time when it's convenient for you.

4. Moss Has Taken Over The Roof

Moss and algae can cover your roof and make it look ugly. These growths can be cleaned off to improve the appearance of your roof, but sometimes they leave a lot of damage behind. Moss, in particular, is hard on asphalt shingles. The roots grow under the shingles and lift them so rain can get underneath the roofing.

When your roof is covered in moss, there may be water damage to the deck too. You may need to have a roof replacement, especially if the shingles are old.

If you know how old the shingles are, you can use their age as a guideline for when your roof should be replaced. Even if you care for your roof well, it eventually wears out due to sun exposure and weather conditions. If you know the shingles are past their expected lifespan, you know it's getting time for a roof replacement. 

For more info about roof replacement, contract a local company.