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How to fix a leak on a flat roof

Mar 9

How to fix a leak on a flat roof

When maintaining a commercial building, there are many problems you will face as an owner or operator. You will need to keep the snow shoveled, the grass trimmed, and many other chores in general maintenance. However, if you have to repair your flat roof, it can be difficult.

You may be reducing the value of your building by having roofing problems. Find local roofing contractors to resolve the problem. Local roofing companies provide roofing services to Lawrenceville. It is here that due diligence is required to ensure you find the best contractor.

Flat roof repair in Lawrenceville is also known as sloped roof repairs. They can be as simple and straightforward as a patch, or as complex as a replacement membrane for the building. Insurance claims can be difficult if the building has been damaged by the weather. The reconstruction of the roofing system can also be complicated, so it is important to hire a professional to do the work.

How to Locate a Leak in a Flat Roof

A few things to remember when inspecting a flat rooftop for leaks. First, wait for the roof's drying time. It should dry for three days. A flat roof that has not been properly dried can release heat under the hole. You will be able to identify the problem. You should mark any leaks you find so you have them handy when you solve your problems.

Measure the distance from the outside wall towards the area of trouble. If the roof is sloped you will find that there isn't any ponding damage to the roof above the problem area.

After you have located the problem area, verify that it is properly installed. Problems can arise from loose flashing or cracked materials such as tar. Roofs can be affected by the heat from the sun. This can cause them to contract and expand, which can eventually lead to roof damage and water entry. Take away all roof debris to expose any possible water entry points. Make sure you also inspect the seams of the roof membrane, which can also be a source of water entry.

Missing roof nails is another indicator of leaks. They create small holes in your roof that allow water to enter the building.

Roof gardens are great but can pose a risk to roofs. If water is not able to escape from the roof, it can build up in the plants.

You may not be happy with the results of cosmetic roof repairs like caulking or patching.

If none of these methods have helped you locate the leak, grab a hose from the garden and begin flooding the roof with water. You can have a helping hand inside the building. They'll look for water in the ceiling and help you pinpoint the problem.

How to fix a leaky flat roof

You must first clear your roof of any debris before you attempt to fix a leak. This will allow you to determine the extent of your problem and help you plan for repairs. A few safety tips are needed when repairing a roof. Make sure that all exits are clear and they aren't slippery. Wear high-visibility clothing when you are working on the roof.


To identify the root causes of roofing problems, it is necessary to inspect every area of the roof. It is important to pay attention to certain areas, such as the drains on the roof. If the drains become blocked with debris, it can cause water to pool on the roof. Water will then find a way in. Next, lookout for signs that indicate repair such as patches. They are temporary solutions that can cause water damage to your building. These seams are crucial and should be checked regularly. They must hold tight to protect the building's interior. Finally, make sure to inspect the flashings and collars that are attached to the roof.

The Repair Cycle

Asphalt Flat Roof Repair

Cracks or blisters on an asphalt roof are most commonly caused by moisture trapped in the tar. Rustoleum is a quick and easy solution. Long-term, a roof felt patch must be installed that has been heated and bonded to the roof.

Concrete Flat Roof Repair

Concrete can crack and cause leaks. Make sure you remove all surface wear before inspecting the roof for cracks. You can temporarily fix the damage with a bitumen primer or bitumen-based paint. To make the repair permanent, torch the roofing felt at the spot where the crack is to seal it against the elements.

EPDM Rubber Roof Repair

Tears and cuts are the biggest problems with rubber-based roofing systems. Cracks, holes, or cuts can result in roof damage. A lap sealant can be used to fill in any gaps. But, it is best not to use too much as you may need to repair the roof. You can apply an EPDM primer to the area to give it a lasting seal. Apply self-adhesive rubber tap once the primer has dried. Make sure to cover the entire circumference with tape. To ensure that the hole is completely closed, use a rolling pin to apply the adhesive.

Flat roofing made of felt

This is the oldest roofing system. It can be damaged by debris and/or felt splitting. Leakage at the edging and failing flashings are problems. You can use a paint solution as a temporary fix to plug the cracks or holes. It is possible that the roof has become too old to provide protection. Liquid sealants can be applied to roofs that are in good to fair condition. It is possible to torch on a felt pad if the contractor has insurance that allows them to use an open flame. This will help to save a lot in the case of problems.

Fibreglass flat roof repair

Cracking around the flashings or at the walls sealing the roof to the building is the most serious problem that a fibreglass roofing system faces. You can also get damaged to the trim, board joints, and the upstands. You can quickly fix any of these problems by using soapy water and then applying an acrylic sealant to the crack to seal it. You can also use acetone and sandpaper for a permanent solution. Then, laminate the area with a chopped strand rug and seal it with a resin coat. You should iron out any areas that may have bubbles. This will prevent openings later. You will need to finish the job by 'curing' the area. Then, apply a top coat made of fibreglass to complete your repair.


Contact us if you have roofing problems, no matter how small.


Top Roofers Lawrenceville

Lawrenceville, GA

(470) 720 5161