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5 Common Signs You Need Slate Roof Repair & How to Fix Them

Posted on September 15, 2023

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5 Common Signs You Need Slate Roof Repair & How to Fix Them

Slate roofs are not easy to maintain, nor are they cheap. They come with their share of maintenance needs and associated costs. Sometimes, slate roof repairs can be expensive, sometimes, only a leak may trouble homeowners. In this blog post, we’ll discuss some common signs that indicate your slate roof needs repair, along with ways you can fix the issues yourself. 

Signs Your Slate Roof Needs Repair

Below are some signs that indicate your slate roof is in need of repair.

1. Hail Damage

Hail Damage to Slate Roof

While slate roofs are naturally resistant to hail impacts, large hailstones can still penetrate through the slate tiles, and impact points can be seen easily during a visual inspection. Hail damage often manifests as visible dents or fractures on the slate’s surface. These imperfections create weak points where water can seep in, potentially leading to leaks and structural issues. This damage compromises the shingle’s ability to shed water effectively, allowing moisture to get through and damage the structure of the roof.

2. Missing or Cracked Shingles

Missing or Cracked Shingles

Over time, the natural weathering process and exposure to the elements can cause slate shingles to deteriorate. Though slate tiles are installed in an overlapping pattern that interlocks them together, they can loosen from their position on your roof if they come in contact with high winds and storms. This is a main point of concern if you live in an area that frequently receives high winds and storms. Additionally, poor installation or inadequate maintenance can accelerate the degradation of slate shingles.

You can easily spot missing or cracked shingles during a roof inspection. Cracks can also result from the expansion and contraction of the slate due to temperature fluctuations. While slate is immune to damage from high temperatures, the structure beneath, and the metal flashing can pose high risks to slate tiles. When the slate becomes brittle and loses its structural integrity, it is more prone to cracking. Missing slate shingles can be a result of windstorms or shingles simply reaching the end of their lifespan.

Is your slate roof reaching the end of its lifespan? Read about what to do here: How Long Does A Slate Roof Last

3. Leaks and Water Stains

Slate Roof Repair

Leaks and water stains on your ceiling or walls are some of the most concerning signs of roof damage. They occur when damaged or deteriorated slate shingles allow water to infiltrate the roofing system. This can happen for various reasons, including some of the ones we listed above, such as cracked shingles.

When slate shingles lose their ability to repel water, rainwater can seep through the gaps. It then trickles down through the layers of the roof and eventually enters your home. Water stains on your interior walls and ceiling indicate a potential, more significant issue, that needs immediate attention.

4. Sagging Roof

A sagging roofline is a clear sign of structural problems. It occurs when the underlying structure, such as the roof deck or support beams, weakens or becomes compromised. In the case of slate roofs, it can result from excessive weight due to heavy snow accumulation or inadequate support. Slate roofs add weight to the roofing structure. If the roof deck is not supported properly, it can result in the roof sagging under the weight of the slate. Sagging should never be ignored, as it’s a sign that the integrity of your entire roofing system is at stake.

5. Moss and Algae Growth

Moss and algae growth on your slate roof primarily occurs in damp and shaded areas. These organisms thrive in moist conditions, especially on roofs with limited exposure to sunlight. The growth itself doesn’t directly damage the slate, but it creates an environment where moisture is retained.

Moss and algae attach themselves to the slate shingles and grow over time, forming a layer that traps moisture underneath. This trapped moisture can lead to freeze-thaw cycles, causing the slate to flake or crack. 

How To Fix Issues And Perform Slate Roof Repair

1. Repairing Hail Damage

Hail damage to a slate roof can be easily seen during a roof inspection. The first step to repairing hail damage is to assess the extent of the damage. However, it is essential to hire a professional roofer to inspect and repair hail-damaged slate roofs. You may even be able to apply for a roof insurance claim if your insurance policy covers hail damage.

Before performing any repairs to your slate roof, consult a professional roofer who has expertise in slate roofing. Small chips and cracks may be hard to find. The professional roofer will assist you in finding them and patching and sealing the damaged area. Carefully apply the sealant to the damaged area, ensuring it adheres securely to the slate surface. 

Do you want professional roofers to tackle your slate roofing issues? Choose from the 7 Best Slate Roofing Contractors In Tulsa, OK

2. Replacing Missing or Cracked Shingles

Replacing missing or cracked shingles is a crucial part of slate roof maintenance. Start by carefully removing the damaged shingle by lifting the surrounding shingles and sliding it out. Then, insert a new slate shingle of the same size and thickness in its place. Secure the new shingle with copper or stainless steel nails to prevent corrosion. Finally, use roofing cement to seal the edges and ensure a watertight fit.

3. Fixing Leaks and Water Stains

Addressing leaks and water stains is essential to prevent further damage to your slate roof and the interior of your home. Begin by identifying the source of the leak on your roof’s surface. Once located, repair the damaged area with roofing cement or replace the affected shingles if necessary. Inside your home, repair any damaged ceilings or walls and ensure proper insulation and ventilation to prevent future leaks. 

4. Fixing a Sagging Roof

Address a sagging roofline immediately, as it indicates structural issues that can compromise the entire roofing system. Contact a professional roofing contractor with experience in slate roofs. They will assess the structural damage and may need to reinforce or replace the damaged support beams, roof deck, or underlayment. Do not attempt to fix structural issues on your own, as it can be dangerous and may lead to further damage.

5. Removing Moss and Algae Growth

Moss and algae growth can be removed to prevent further moisture retention and potential damage to your slate roof. Start by using a long-handled brush or broom to scrub away the moss and algae gently. Avoid using pressure washers or harsh chemicals, as they can damage the slate surface. To prevent future growth, trim overhanging branches to allow more sunlight onto the roof, and look at improving your ventilation system to reduce moisture buildup.

How To Maintain Your Slate Roof And Prevent Future Damage

1. Regular Inspections

Regular inspections help you catch issues early before they escalate into expensive repairs.

Schedule yearly inspections, ideally in the spring or fall, to assess the condition of your slate roof. Look for missing or damaged shingles, signs of moss or algae growth, and any structural issues like sagging.

2. Keep Gutters Clean

Clogged gutters can lead to an overflow of water, which can damage your slate roof and lead to leaks. Clean your gutters at least twice a year to remove leaves, debris, and any moss or algae buildup. Ensure downspouts are clear and direct water away from your home’s foundation.

3. Trim Overhanging Branches

Overhanging branches can shade your roof, creating the perfect environment for moss and algae growth. Trim branches that hang over your roof to allow more sunlight and air circulation. This helps prevent moisture retention on the slate shingles.

4. Remove Moss and Algae

Moss and algae can accelerate the weathering process of your slate roof. Gently remove moss and algae as directed above, and regularly maintain a clean roof surface to discourage their growth.

5. Repair Damaged Shingles Promptly

Promptly addressing damaged shingles prevents water infiltration and more extensive damage, so replace missing or cracked shingles as soon as you notice them. Use matching slate shingles and secure them with copper or stainless steel nails. Seal the edges with roofing cement to ensure a watertight fit.

Professional Slate Roof Repair In Tulsa, OK 

Have you noticed similar signs to the ones mentioned in this blog post on your slate roof in Tulsa? If so, repairing your slate roof is the right decision. As you know, slate roofs are an expensive investment, so you don’t want to leave them susceptible to damage. Why let the current damage you have worsen? Hire the skilled and experienced team of roofers from A. Fricker Roofing & Waterproofing in Tulsa, OK. We’re a local company that knows the weather patterns your slate roof faces in Tulsa. We can help with all your roofing needs, regardless if your roof is made of slate or not. Contact us today at (918)-402-7167 and consult a professional roofer about your slate roof repair.