How To Repair a Roof Leak

A leaking roof can quickly lead to more serious structural issues, from water stains on the ceiling to mould growth and even significant damage to the roof structure itself. Whether it’s a flat roof leak repair or a problem with missing roof tiles, addressing the issue promptly is key to preventing extra costs and ensuring the longevity of your roofing materials.

This guide will walk you through the steps of diagnosing, fixing, and preventing roof leaks, covering everything from temporary fixes to more permanent roofing work. We’ll also discuss when to call a professional roofer and how to ensure the job is done properly.

Identifying the Source of the Roof Leak

Before you can fix a roof leak, you need to determine its source and find any signs your roof needs repair. This can be trickier than it sounds, as water can travel along the roof surface before dripping into your home. Here’s how to locate the affected area:

Look for Water Stains and Other Signs

• Inspect your ceiling for water stains, discolouration, or peeling paint.
• Check for mould growth or a damp smell, which may indicate prolonged water exposure.
• Examine the attic for wet insulation, wood rot, or dripping water during heavy rain.

Perform a Water Test

If you can’t find the leak visually, try a controlled water test:

1. Grab a garden hose and have a helper stand inside the attic with a flashlight.
2. Spray water over small sections of the roof while your helper looks for drips.
3. Mark any areas where water enters and identify whether the issue is due to missing flashing, damaged shingles, or small holes in the roofing materials.

Source

Temporary Fixes for a Leaky Roof

If you can’t complete a full roof repair immediately, you’ll need a temporary fix to prevent further damage.

Use Plastic Sheeting

For larger roof damage or a missing section of roofing, secure plastic sheeting or tarpaulin over the affected area. Use roofing nails or heavy objects to keep it in place until a permanent fix is possible.

Apply Roof Cement and Roof Patch

For small roof leaks, roof cement can create a quick watertight seal. Apply it over cracks, small holes, or around exposed nails. For missing or damaged shingles, a roof patch can help hold the area together temporarily.

Seal Flashing and Chimney Stacks

Leaks often occur around chimney stacks, vent pipes, or skylights where flashing has deteriorated. Use roofing cement to seal small gaps or replace missing flashing where necessary.

Permanent Roof Repair Methods

Replacing Missing or Damaged Shingles

If missing shingles are the cause of the leak, replacing them is crucial to restoring the roof’s integrity.

1. Remove the damaged shingles using a pry bar, being careful not to damage surrounding ones.
2. Slide a new shingle into place and secure it with roofing nails.
3. Apply roof cement to seal the edges and prevent water infiltration.

Repairing Damaged Flashing

Damaged flashing around roof penetrations is a common cause of leaks. If your flashing is corroded or cracked:

1. Remove the old flashing carefully, ensuring no further damage is done to the roof surface.
2. Install new flashing, securing it with roofing nails and sealing it with roof cement.
3. Inspect the area after the next heavy rain to ensure a watertight seal.

Fixing a Flat Roof Leak

Flat roofs are particularly prone to water pooling and leaks. If you notice bubbling, blistering, or cracking on a flat roof:

• Cut away damaged sections and clean the affected area thoroughly.
• Apply roofing cement and reinforce with a roof patch or new roofing membrane.
• Ensure proper drainage to prevent future water pooling.

When to Call a Professional Roofer

While some roof repairs can be done as a DIY project, significant damage, traditional roofing, or structural issues require professional intervention. You should contact a roofer if:

• The leak is extensive and causes structural damage.
• You notice widespread missing shingles or a compromised roofing structure.
• Water stains reappear despite attempts to fix the leak.
• You are not comfortable working at heights or lack the necessary safety equipment.
• You need professional advice for roofing for heritage buildings.

Preventing Future Roof Leaks

To avoid dealing with a leaking roof in the future, regular maintenance is essential:

• Inspect Your Roof Regularly – Check for missing shingles, cracks, or signs of wear at least twice a year.
• Clear Gutters and Drains – Water pooling due to blocked drainage can accelerate roof damage.
• Address Ice Dams – In colder climates, ice dams can cause significant damage by forcing water under shingles.
• Schedule Professional Inspections – A roofing job done by a professional roofer ensures long-term protection.

Closing Thoughts

Roof leaks can lead to significant damage if not addressed promptly. Whether it’s a small leak or a more complex roofing issue, acting fast can save you from extra costs and potential structural damage. By following the right steps for diagnosing and fixing a leaky roof, and ensuring proper maintenance, you can protect your home from bad weather and water damage.

At C Kearney Roofing, our team of roofing experts offers high-quality repair and replacement services to keep your roof in top condition.

Contact us today to discuss your roofing needs and find the perfect slate solution for your home or business.

How To Repair a Roof Leak FAQs