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Slate Roof Installation – Replacing a Broken Slate

In this segment we will show you two methods to replace a broken slate.

Replacing a broken slate properly is important to the service life of all slate roofs. Slate repairs are often done incorrectly and carelessly. A slate should never be face nailed and or caulked in place.

Methods For Replacing A Broken Slate

The first step is to remove the slate and nails to allow the new slate to easily be installed. Using a slate ripper slide it under the broken slate and move it around until you have hooked one nail, then strike the slate ripper handle with your hammer until you have pulled the nail free, repeat on the other nail and remove the broken slate.

There are several methods to secure a new slate in place. Today we are going to show two. The slate hook method and the nail and bib method.

The slate hook method uses a manufactured copper or stainless-steel wire. Lay the slate hook end at the location of the butt and mark the location of the nail end. Pre-drilling will make the installation much easier. Tap the nail end in the hole. Then slide the new slate over the hook. Using the ripper pull the slate down to engage the hook.

To replace a broken slate with the bib method, slide the new slate into position, secure the slate with a nail in the joint between the upper rows. Then make a bib that is an 8” x 3” piece of copper that has short cuts on both sides and is slightly bent. Push the bib up the joint until the nail is covered and the bib is 2” to 3” above the butt end of the upper course. I hope this helped you understand two ways to replace a broken slate.

For part 7 of our series, on Installing an Open Valley, click here.

For more info visit www.slateassociation.org and become a member.

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Looking for a slate roofing contractor?
We work with the top “slaters” to ensure quality installation from slate roofing repairs, restoration or new construction. Read More
What sizes of roofing slate are available?
The standard sizes for roofing slate start at 12″ in length and increase by 2-inch increments up to 24″ in length. Read More
How much does a slate roof cost? We are often asked by designers, architects, home and building owners “What will a slate roof cost me”?
On average, North American produced S-1 rated roofing slate will cost $400 – $600 USD per square (100 square feet) or $4.00 to $6. Read More

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