How to Waterproof A Flat Roof: Tips For Success

Roofing Tips

waterproof a roof

As a homeowner in South Florida, one of the most important investments you can make is to ensure your roof is waterproof. Because sloped roofs can be susceptible to the severe hurricane-force winds that batter the region, flat roofs are a popular alternative to mitigate this problem.

Flat roofs, however, can be prone to leaks if not properly waterproofed. Follow these tips to waterproof a flat roof and ensure that it stays that way.

1. Regular Maintenance And Inspection

The first step in waterproofing your flat roof is to conduct regular maintenance and inspections. Ensure that you inspect your roof at least twice a year and after any severe weather event. Check for any cracks, tears, or punctures in the roofing material. Also, ensure that the roof’s drainage system is functioning correctly, as clogged gutters or downspouts can cause water to pool on the roof.

If you’ve neglected your maintenance recently, you may need to repair your flat roof.

2. Choose The Right Waterproofing Material

It’s essential to make the right choice when investigating materials for your waterproofing project. Tried and tested flat roofs waterproofing materials, such as EPDM, TPO, and PVC are always popular choices. Each material has its own set of advantages and disadvantages, so it’s essential to consult with a roofing professional to determine which material is best suited for your roof.


EPDM stands for ethylene propylene diene terpolymer. It’s a thick rubber-like material that is attached to the roof in the following ways:

  • Fully adhered using a contact adhesive
  • Mechanically attached with roofing nails
  • Ballasted (weighed down)


TPO stands for thermoplastic polyolefin elastomers. It’s perfect for flat roofing installations because of its UV-resistant qualities.


Polyvinyl Chloride, or PVC, is a well-known plastic membrane. It’s very popular for flat roofs because it is white. This means it is very good at reflecting the heat of the sun and keeping the dwelling beneath it cool.

3. Ensure Proper Installation

The installation of your waterproofing material is as important as the material itself. If the material is not installed correctly, it can lead to leaks and costly repairs. Ensure that your professional roofing contractor has experience in installing flat roof waterproofing systems.

4. Maintain Proper Drainage

As mentioned earlier, proper drainage is essential for the success of your waterproofing project. Ensure that your roof’s drainage system is free from any blockages, and water is being directed away from the roof. If necessary, install additional drainage systems such as scuppers or overflow drains.

5. Regular Cleaning

Regular cleaning of your flat roof is essential to ensure its longevity. Garden litter such as leaves, branches, and moss can accumulate on your roof and clog your drainage system, causing water to pool on the roof. Regular cleaning of your roof will prevent this from happening and ensure that your drainage system is functioning well.

Waterproof Your Roof

Your flat roof is a joy in the windy season, but it can be a burden if it’s not waterproof. The contractors at ABC Roofing have been waterproofing flat roofs in South Florida for over 30 years.

If you’re looking for a new waterproof roof installation, we’re here to help. As a family-owned business, we take great pride in our service and workmanship. For help with waterproofing your roof, or any of our other residential roof repair services, give us a call at (954) 344 4622.

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