Flat-Roofers-in-Dublin City

The most Common Flat Roof Problems

Flat Roof Ponding Water Problems and 4 Solution by pinguisweb

Flat roofs are widely seen in Dublin, mainly on warehouses and other commercial buildings. They’re also very common on residential, covering porches, terraces and additions. It doesn’t matter where or which material used to waterproof a flat roof, they usually have a common problem: ponding water areas. We at dublin roofers want to talk about the importance of fixing ponding water to prevent future roof failure in your flat roof.

If you live in dublin region, flat roof ponding water is a very common problem. In order to effectively drain water, flat roofs must be sloped at least 10 to 20 degrees. In new constructions, it is easy to comply with this requirement but sometimes reality is different when you have to re-roof. Because it rains constantly in Ireland, flat roofs can deteriorate faster than other countries.

Roof, Repair, DublinFlat roof systems are not designed to hold water. They are designed to positively drain water off the roof. Ponding water should not stay for more than 48 hours on your roof. When that happens flat roofs start failing around penetrations, flashing and seams. The only system that performs well holding ponding water is silicone coating because of silicon properties, but it is not exempt from other problems like dirt attraction.

The first thing to do is to decide what is creating ponding the water on your roof.  Here are some possible problems and how to solve them:

  1. Structure failure: Trusses or beams could be failing and that can create a deck depression.  In that case the solution is to replace all damaged structure to return the wood deck back to its original position.
  2. Damaged wood or plywood: Plywood damaged by water usually becomes more flexible and starts bending by water weight.  The solution is to replace all damage plywood. We are the number one flat roofers in dublin
  3. The roof is completely flat: In this case the best solution, which is not the least expensive, is to create hips and valleys using tapered insulation. This is a great solution because you are not just going to drain all the water off your roof, but you are also going to lower the room temperature considerably which is a plus when you live in Dublin. Another less expensive solution you have is to apply a top layer of silicone coating that will hold ponds of water. This will extend the life of the roof for another 10 to 15 years. But to be applied, the deck and the existing roof must be completely dry and ponds of water can not be a weight threat to the roof structure.
  4. Self-leveling Lightweight Concrete is another solution. This is usually used when there is no Structure Failure and there is a relatively small area to cover. The roofing team has to make sure that adding weight won’t create a future failure problem to the roof.

As you see, there are many reasons why there is water ponds on your roof. Let a professional identify the water problems. For example, if there is beam or truss failure and you add yourself a self-leveling concrete to correct the depression, you will be adding more weight to the structure and make it more likely to fail. Fibreglass roofing is a firm alternative

Call us for a free advise and free estimate.

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