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Jul 18, 2021 · Look Uphill to Find Roof Leaks. When tracking down a leak, start by looking at the roof uphill from the stains. The first thing to look for is roof penetrations — items poking through the roofing are the most common source of leaks. In fact, it’s rare for leaks to develop in open areas of uninterrupted shingles, even on older roofs.
- Chris Deziel
- Overview
- Signs of a Roof Leak
- Finding a Roof Leak With Attic Access
- Finding a Roof Leak Without Attic Access
- Causes of Leaks
Before you can fix a roof leak, you’ve got to find the source of the problem. This may seem daunting, but it’s a surprisingly easy process most of the time—especially if you have access to your attic. But even if you don’t, there are a few easy methods to identify the cause of your problem so that you can patch it ASAP. We’ll break all of it down here.
Dark spots or discoloration on your wall, ceiling, or insulation are signs of moisture.
Follow your nose; if you smell mildew or mold there’s likely a leak nearby.
Condensation or rust on roof nails indicate there’s a leak between the ceiling and the nail.
Any alteration to your wall or ceiling could indicate a leak. In general, you likely have a leak if you notice any of the following in your home’s walls, ceilings, or attic:
Dark spots or discoloration on wood, drywall, or insulation.
Softened or squishy drywall or plaster.
Mold growth or a mildew smell.
Rust or condensation on nails and other metal objects.
Damage, stains, or dampness (especially noticeable in the insulation).
Go into your attic when it’s still light out.
If you have a dedicated entry point to go into your attic, use that to access your attic. If you have an outdoor hatch, wait until it’s dry out to set the ladder up to go into your roof. Do this when it’s bright out so you can see light coming in through the leak.
If you’ve never accessed your attic’s crawlspace, look for a square-shaped board embedded in the ceiling of the highest floor in your home. Get on a ladder and try pressing the panel up to open the access hatch.
Look for shards of light bleeding into the attic.
Turn any lightbulbs or light sources off. Give yourself a minute or so to let your eyes adjust. Then, look for any points of light that you can see pouring into the attic from the outside. Take your time and work your way around each section of your attic. Just look for any light that shouldn’t be there and follow it to find the source of your leak.
Turn the light back on if you’re worried about where you’re stepping as you work your way around the attic.
Work backwards from the leak to look for visual damage.
If you see water damage in your wall, figure out what’s on the other side of the wall. Go outside and visually inspect the roof on that side to look for damage. If you’ve got a ladder big enough, climb to the highest rung to take a closer look to see if you can spot the damage.
Do not get off of the ladder to go onto the roof unless it is 100% safe (i.e. it’s a flat roof and you have a roof harness installed and set up properly). Just look from the ladder.
Inspect the gutters and downspouts when it rains next.
If you cannot find a single source of the leak or the evidence of the leak appears to cover a large area, wait for it to rain. When it does, go outside and look at your gutters and downspouts. If the water is spilling over a section of gutter or a downspout isn’t letting water out, it’s a sign there’s a blockage. This is likely the source of the leak.
If the gutters are blocked or damaged, water can pool up and soak into the wood siding behind it.
Most roofing materials can stand the test of time for 15-25 years. Eventually, your roof is going to need to be replaced, though. Shingles start to deteriorate, the subroof starts to warp and become brittle, roofing nails rust, and all kinds of weather just compound to the point where it’s cheaper to replace the roof than continue making repairs.
The shingles are the first line of defense against squirrels, rain, hail, and tree branches. If a shingle becomes damaged or falls off, the underlayment of the roof becomes exposed. If that underlayment tears (which is quite easy once a shingle is gone), the subroof is going to start absorbing water. This will cause all kinds of leaks over time.
- Pipe Boot Failure. The most common roof leak is when a boot around a pipe fails or another penetration. A pipe boot is a type of roof flashing that goes around the base of the pipes coming through your roof.
- Improperly driven nails. The second most common cause of roof leaks is when a roofing nail backs out through a shingle. If a nail isn’t driven in far enough or driven in sideways, the head of the nail eventually work its way up through the shingle.
- Debris in gutters that stop above a roof-line under a valley. A roof valley is when two slopes meet in a V shape that allows water to flow down a roof into the gutters.
- Chimney wear and tear. While not exactly a roof leak, the next common leak is actually multiple chimney problems. It could be leaking from problems with the flashing under the shingles surrounding the chimney.
Jun 19, 2024 · The most likely places for a roof leak are around penetrations or areas where different parts of the roof come together. This includes chimneys, flashing (especially step flashing), vents, skylights, and roof valleys. Leaks can also develop due to damaged or missing shingles.
Dec 13, 2023 · To repair a leaking roof with curled shingles, straighten the shingles with a heat source, like a hair dryer, and reattach them with asphalt roof cement or compound. For loose or damaged shingles, remove them by pulling the nail out and scraping glue from underneath the shingles before replacing with new ones.
- 1 min
- 811.8K
- David Bitan
A leaking roof can be caused by age and general wear and tear, as tiles come loose, or roofing felt gets damaged. Sometimes the worst happens, and your roof can leak due to damage from bad weather such as storm damage or a falling tree. First steps: What to do when you find a leaking roof.
Nov 13, 2018 · Old or Damaged Shingles. Over time, shingles can become brittle, cracked, or missing, creating openings for water to penetrate. Regular roof inspections can help identify and replace damaged shingles before they lead to leaks. Ice Dams. In colder climates, ice dams can form at the roof’s edge, preventing melting snow from draining properly.
