When does a slate roof need replacing?

Slate roofs are designed to last 100 years or more, and when regularly inspected and properly maintained can easily reach this age. To reach this milestone, broken cracked or missing slates should be replaced promptly by an experienced slater to prevent more serious damage.

How do you know when a slate roof needs replacing?

If you hear a dull, dead, sound it’s likely that the slate has become porous and is past its usefulness. As a guide if 20% of the original slates have been renewed, and repairs are scattered all over the roof, further repairs are considered to be no longer cost effective.

What is the life expectancy of a slate roof?

Installed properly, slate roofs require relatively little maintenance and will last 60 to 125 years or longer depending on the type of slate employed, roof configuration, and the geographical location of the property. Some slates have been known to last over 200 years.

How do I know if my roof is leaking slate?

Flashing protects areas of the roof that either get a lot of water, like valleys, or have a high risk of leaking, like roof penetrations. Because flashing is typically made of metal, it is vulnerable to rust and corrosion. Over time, flashing can warp, corrode, and sustain other damage from weather or falling debris.

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Are slate roofs worth it?

Because slate roofs are made of a premium material that is durable, long lasting, and beautiful, having a slate roof can increase your house’s value. This is especially helpful when selling your house, as it can help you command a higher price than a comparable house with an asphalt roof.

How do I know if my slate is hard or soft slate?

You can judge the quality of your slate very simply by looking at the exposed surface. Is it flaking and crumbly looking or is it smooth, maybe even shiny? Smooth is good, and smooth surfaced slate roofs should be preserved. Flaky ones can be preserved too, although flaking is usually a sign of deterioration.

Why do slate roofs fail?

While it’s true slate tiles are impervious to moisture, if the tiles sustain a crack, they’re vulnerable to leaks. Unfortunately, the most common reason slate roofs crack is because someone walked over them. … To avoid this make sure to only hire a roofer who really knows their way around a slate roof.

How much does it cost to remove slate roof?

Cost to Replace a Slate Roof

On average, it can cost you about an additional $2 to $5 per square foot to remove the old roof.

Is it safe to walk on a slate roof?

Though slate roofs are durable, over time they tend to deteriorate. Instances are there when slate roofs became crumbly. You must not walk on a slate roof under this condition.

When did they stop using slate roofs?

Slate peaked in the early 1900s but then declined as asphalt shingles flooded the market by hugely cheaper pricing of the material. A relatively recent interest in historic preservation and historic style has revitalized the material.

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Should I remove my slate roof?

The longevity of slate is key to its value in the eyes of homeowners. After all, roofing can be expensive. Slate is one of the few roofing options that doesn’t need to be replaced within the span of a lifetime. In most environments, slate shingles will last at least 125 years and sometimes as long as 200 years.

How much does it cost to replace a roof on a 2200 square foot house?

A new asphalt shingles roof for a typical 2,000 to 2,200 square foot single-family house can range in price from $9,500 to $16,500 fully installed, including tear off and disposal of the old roof (up to two layers).

Can slate roofs be cleaned?

Slate Shingle

Regular roof cleaning is critical for your roof, as slate is easy to cleave and water absorbent. Buildup of moss and debris on slate roofs hold moisture in the slates that can split them during winter. When cleaning a slate roof, don’t use chemicals like ammonia or chlorine bleach.