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How Do You Stop A Flat Roof From Leaking?

Sean Levine  |  December 11, 2022  |   |  No Comments

One issue that frequently plagues flat roofs is the dreaded roof leak. Flat roof leaks can occur for a legion of reasons, that may not be incontinently obvious. However, you’ll need to carry out a thorough examination to identify the root of the trouble and get it fixed, if your flat roof is leaking. Failing to do so snappily could lead to all kinds of issues, including flooding, decaying, and mold. Nothing is relative as concerning as observing an unvarying drip of water coming from your ceiling. This is an eventuality if you neglect to repair your roof. As water flows from your ceiling during massive rain, there's little you can do. If you notice this call a professional roofing company to repair the leak in your roof.

What Causes Flat Roof Leaks?

There are numerous causes of flat roof leaks. The frequent sources include the following;

  1. Cracks and Splits; Caused substantially by aging, the material isn't capable of duly expanding and contracting, backfiring in the material splitting as the expansion is higher than anticipated.
  2. Joins and Overlaps; A familiar cause for joins and overlaps leaking comes from the lapping not being very good. This causes the water then tracks in between the two layers. However, it's frequent for this to be an area of concern, if the product has been fire-welded simultaneously. The join can part due to not being welded sufficiently. Still, the material can split due to being watered down from over-heating the join and damaging/ melting the material.
  3. Around outlets Roof- lights; A common cause here's that the flange around an outlet is either not substantial enough and or is ill befitting to the pipe or outlet. It could also be due to not being clammed to the flat roof material and or incorrect installation.
  4. Lead Flashing or where the felt itself is flashed into the wall; It's well tactical to check along the joint where the roof material is erected (flashed) into the touching wall. It's usual for the installation to not be profound enough causing it to pop out, leaving a gap for the water to fluently enter the structure.
  5. Screw/Bolt holes; There should be no bolt holes and screws passing through any flat roof stuff, but due to the fitting of air exertion units, rails, etc the silicones harden causing them to fail in dilating and contracting satisfactorily.
  6. Alteration in angles; Frequent when lining gutters, the covering of asbestos sheets or where the border of the flat roof meets with a perpendicular wall, it's significant to check these areas as the crest or curve puts varying stresses on the roof material. The 90 ⁰ angle is always an area to be checked instead as cracking frequently occurs along this angle.
  7. Glazing Bars; Old glazing was substantially installed and clammed with the use of putty which over some time not only becomes crisp but also naturally loses its tenacious strength. Also, flat roof leaks can be caused due to rotting/old timber.
  8. Ridge Caps/Missing Foam Infills; Foam infills utilized to fill the gap, specifically on corrugated roofing breaks down (mainly by UV declination) over the years and fall out. Inversely it can be pecked removed by birds, and ingested by insects and rodents which also means that the remainder unavoidably also falls out.

How To Fix A Leaking Flat Roof

You may need to save money until you have the deposit to invest in the required repairs for your roof, which means you’ll need to make some repairs of your own and this are the ways.

  • Find the Leak

Look for the origin of your leak from inside the structure. The water may have scampered along your roof through the leak and pooled in a distant spot, meaning the leak may not be the spot that has the most water.

  • Get on the Roof

Take the measurements you formed from the interior and begin looking for the leak on the roof. However, look for any detriment to the roof membrane near any flashing or outlets on the roof, if no detriment is apparent.

  • Remove Any Debris

Your roof may possess debris that can hamper your work or which can beget more damage. Precisely take off any foreign objects from the area near the roof leak before starting work. You’ll also be able to judge if your roof was damaged in a storm or if it's simply facing age-related wear and tear and gash.

  • Dry the region

Flat roofs frequently collect water, so be certain to dry the area you propose to repair before you begin to work edit. However, you could prompt mold to grow under your roof, If you repair a hole and trap humidity underneath your patch. However, you may need professional backing, if large quantities of water are already rolling in between layers of your roof.

  • Distinguish the Damage

Look for any blisters on your roof, which can denote that water or air has strained between the diverse layers of your roof. You'll also need to check for splits which generally indicates long-term sun detriment.

  • Apply Roofing Cement

Peel back the layers of the membrane you cut and apply roofing cement to the leak and to the whole quarter of the roof underneath the membranes you cut down. This will stuff it and will also give an adhesive for the flaps of the membrane to cling to. Press the membrane flaps to the cement to reseal the cut.

  • Nail it Down

Once you lay down the flaps of the blister, nail them to the roof to completely keep them in the spot and to bar the leak. Make sure you won’t be nailing any cables underneath or any other sensitive structure. Cover the nails with a further roofing cement to seal any holes you may make.


We're your go-to company for repairs and installation of roofs, reach out to us at 68-38 Main Street #2 Flushing, NY 11367 (718) 489-4009 https://www.kingsqueensroofing.com

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