When water leaks through your ceiling, it's a big clue that you need flat roof repair or replacement services ASAP. However, roof problems aren't always this obvious, so it's important to watch for subtle signs that something may be wrong. Here are four easy-to-miss signs that you may need to have your flat roof repaired soon. 

1) Your flat roof is sagging

If your flat roof starts to sag or dip in the middle, this could be a sign of structural damage caused by water pooling on the roof. These pools of water are caused by poor drainage. Sagging can be difficult to see, especially if you aren't trained in flat roof repair services. That's why it's important to call an experienced roofer if you suspect there may be a problem.

2) The color of your roof has changed

If you notice that the color of your flat roof has changed from a rich, vibrant shade to an uneven or faded look, it could be a sign that its protective layer is deteriorating. This kind of damage can cause water to leak into your home, so don't ignore discolored roofing for too long. If you notice any changes in the color of your roof, it's a good idea to call a flat roof repair expert to take a closer look.

3) You see algae growth

Algae growth is usually caused by moisture that collects on the surface of your roof. While algae can be unsightly, it's important to remember that it can also cause serious damage if left unchecked. Untreated algae can cause the underlayment of your roof to rot and weaken, making it more prone to leaks. If you notice any algae growing on your flat roof, don't hesitate to call a repair expert for advice on how to rectify the situation.

4) Your energy bills are higher than usual

Your flat roof may need repairs if your energy bills start to skyrocket. That's because holes or cracks in your roof make it easier for air to escape, causing your HVAC system to work harder and use more energy. This can happen during any season of the year, so keep an eye on rising utility costs in case your flat roof is the culprit.

If you've noticed any of these four signs, don't postpone flat roof repair services for long. Contact a local roofing company to learn more about flat roof repair.