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Flat Roof Leak Repair

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By Golden Coast Roofing

Get to know our team at Golden Coast Roofing before you look for a residential roofing company in Sherman Oaks or start your next roofing project!

Nobody enjoys wading through puddles, particularly when doing so within their own house. It might be challenging to locate a leakage in a flat roof, but with perseverance you can block the leak and keep the outside where it belongs. Golden Coast Roofing, the best roofing company in the Los Angeles area, specialize in flat roof leak repair, contact us today for roof repair and maintenance and we will provide a 5 star service, guaranteed.

Flat roof leak detection: How to detect a flat roof leak

Finding a leaking roof can be challenging. Even in flat-roofed building, the presence of water on the ceiling does not necessarily indicate that the leak is exactly above it. Water can only flow down a steep rooftop. However, because water always chooses the route that offers the least amount of friction, any variation in a flat rooftop leads the flow of water. That could include low areas, rafters, electricity, or venting systems, or possibly both. In a flat-roofed building, water can flow in any way, making it slightly more challenging to locate the leak’s origin.

Clean the debris off your roof

Use a leaf blower or push sweeper to remove all the leaves, twigs, and other detritus off your rooftop. Making sure the area is free of debris can make your leakage search easier because dirt may be hiding issue areas on the rooftop.

Examine Your Flashing

Rooftop flashing is a substance formed of steel bars that seals off openings in the roof where chimneys, windows, or other structures must be installed. Flashing typically has two layers: an outside layer that provides supplementary security and a middle lining that protects the hardwood sub-roof component. Because of the flat roof extension leaking and contraction of the substances used for the roof, flashing can deteriorate, rust, or split over time, which causes water to infiltrate through the crevices. See our complete guide to Chimney Flashing.

Examine the joints and the plumbing vent funnels

A seam will be present anywhere two roofing pieces join. These joints can occasionally separate, allowing gaps where water can enter the building. Like this, plumbing exhaust system that leave the rooftop may have open areas between them and the rooftop due to caps becoming loose or destroyed.

Verify Old Repairs

If the roofing has previously leaked, the repairing substance used to fix the leak may have deteriorated, enabling the existing leak’s origin to become once again exposed to the surroundings.

Look for low areas

Water might pool in the low areas of the rooftop. Over than 48 hours of standing water on a roof might cause the roofing substance to start to deteriorate. Repeatedly doing this might cause the roofing fabric to deteriorate to the extent where a leak develops.

Mist the Rooftop

Wet down any dubious portions of the rooftop with a hose pipe and look inside to determine if the water problem has progressed. If you’re still struggling to locate the leak’s origin, wet each part of the rooftop individually and look for signs of water underneath. Based on the scale of the rooftop, this phase could take a few hours.

4 Common Causes of Leaks on Flat Roofs

Faulty flashing

Flashing, which is placed at the outer roof margins and internal wall surfaces to safeguard the roof surface, is responsible for a significant portion of corporate roof leakage. The margins of the rooftop top become revealed when flashing is improperly fitted or is harmed by wind or environmental fluctuations. This makes it possible for water to enter the rooftop structure.

Pending Intrusions

There are several penetrations in a roof, including HVAC systems, drainage, pipelines, and ventilation, all of which must pass via the rooftop surface. All openings are vulnerable to leakage, so they must all be sealed off to avoid harm. Regular inspections of penetrations are necessary to make sure they have the proper pitch plates, rain bands, and flashing to keep them impermeable.

Roof membrane damage

The house’s inside must be shielded from water by the roof system. As the membrane gets older, it may fracture, deform, boil, or pierce, revealing the roof’s insulating and providing water with an easy entrance. If the roofing barrier is damaged early enough, it may be restored; however, a coating that has reached the point of its estimated lifetime will need to be changed.

Ponderous Water

You obviously have a drainage issue if there is standing water on your flat rooftop for a minimum of 48 hours. A sq ft of stagnant water weighs around five pounds per inch. Your house’s roofing is put under an additional one ton of pressure if there is a 20 by 20-foot patch of ponding water that is only one inch thick. Ponding water on a rooftop increases the risk of collapsing due to weight, but it can also cause leaks, algae growth, decay of the roof system, and degradation of the reflective surface.

How To Stop a Flat Roof Leak: when to call a professional

Most homeowners are more than pleased to make small financial savings. Consequently, when house repairs are required, there could be a tendency to deal with the problem immediately. But when is it required to see a professional for Sherman Oaks rooftop leakage repair?

How to stop a flat roof leak

If simply to keep your belongings out of the course of the drips of moisture for a few days, momentarily repairing the leakage in your flat rooftop is frequently a smart solution to give yourself time. The best temporary fix for a flat rooftop leakage is typically to cover the spot with waterproofing paint. However, keep in mind that if your rooftop leakage originates from several different places spread out over a big region, you shouldn’t apply waterproofing paint since this is ineffective and may make matters worse in the long run.

Assemble roofing materials in accordance with the supplier’s instructions. Although it may seem simple, we frequently see this on expansions and do-it-yourself tasks. Many producers advise raising up the top and turning down the bottom of the panels, which must be accomplished with a flip up and turn downward tool.

Increase the length of the roof tiles in the gutter. The less probability of wicking forces, where water creep’s reliable backup the roofing sheets and enters the rooftop, the more overflow you can obtain into a gutter. 50mm is the minimum needed. We advise beginning at 100mm of shadow on a level roof. Just be certain to provide space for gutter upkeep.

Four indications that you should hire a professional roofer to fix your leak

  1. The Leak Is Invisible. Identifying the root of the issue can occasionally be the most difficult element of fixing a leaky roof. You cannot remediate a leak if you can’t identify the source of the leakage. A professional will understand where to search and will be less hesitant to remove shingles to discover the leak’s origin.


  1. You Experience Flashing Issues. One of the most difficult places to waterproof is the flashing, which is the section where the cornice joins the rooftop. Under flashing that isn’t working properly, water can enter through cycles of both freezing and thawing. Flashing ought to prevent water from entering the house. If it doesn’t, you have an issue that must be fixed by a professional. Call for assistance if your flashing is damaged, worn out, or rusted.


  1. In the loft, there are water marks. Water streaks in the loft, which are connected to #1 above, suggest that there is a leakage. It may be a gradual leak that requires some ability to locate if the water is merely coloring the rooftop decks and not dripping or damaging the ceilings.


  1. You Have Chimney and Pipe Issues.  Contact a professional if the flashing around your chimney and exhaust lines is broken, damaged, or absent. For the inside of the house to be protected from water, flashing around these elements is essential. If they’re not working, you’ll immediately notice leakage. Flashing restoration around these elements can be challenging and is best left to the professionals.

In Sherman Oaks, get in touch with Golden Coast Roofing for flat roof leak repair.

Contact Golden Coast Roofing if you are experiencing issues with flashing, roof leaks, or dampness accumulation in your loft. In Sherman Oaks and the neighboring area, we provide regular examinations and professional repair services. A fast check can identify the issue and stop a tiny leak from growing into a major hassle.

Questions & Answers

How do you fix a flat roof that leaks?

Applying a thin coat of bitumen primer to a clean area before using bitumen-based water - resistant paint is the best course of action for fixing a leaky flat roof. If this is insufficient to stop the leak, you can try covering the gap with a little bit of torch-on felt.

Can you patch a leaking flat roof?

The most typical approach is to do a "patch repair" for a more long-lasting fix. Self-adhesive rubber band and self-adhesive sheeting are used in combination to patch the opening in this method. After that, attach the patch to your rooftop using an EPDM sealer.

What is the best sealant for flat roofs?

The most frequent causes of flat rooftop failure include faulty installation, neglect, aging, thermal displacement, and inappropriate usage. In light of this, the ideal roof sealer would be smooth, long-lasting, easy to manage, and come with a long warranty. It would also be resistant to temperature motion.

Can I fix a flat roof myself?

If you have a minor leakage and are accustomed to performing DIY fixes in general, you may be able to fix small leaks in any of these kinds of roofs on your own by utilizing the right equipment and methods. When performing a repair, age and state should be taken into account.

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