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Slate 101

Whether you are a 2nd generation slate roofer (aka ‘slater’) or just getting started on a roof repair or replacement project, this page will help set you up for success! Slate roofs have been installed all over the world for centuries. Simply stated they are the best and most beautiful. A natural slate roof is the most cost-efficient roofing material when amortized over its life expectancy.

We are dedicated to making sure that your new or existing slate roof lives up to its promise.

Copper Slating Nails

Copper Slating Nails

Copper slating nails are the most common fastener for installing slate roofs
Thickness and Weights

Thickness and Weights

SLATE THICKNESS and WEIGHTS Thickness Approximate Weight Pounds per square at 3” headlap 3/16" 700 3/16" –...
Slate Repair Match

3 Things to Consider When Repairing an Existing Slate Roof

Let us help identify the proper Color, Size & Thickness to help find a match!
Snow Guards & Retention Systems

Snow Guards & Retention Systems

Snow guards and rail retention systems are used to keep snow on the roof and prevent it from sliding off and damaging gutters, landscaping and pedestrians due to...
Standard Sizes

Standard Sizes

Natural Slate Sizes, Pieces per Square, Exposure and Weight per Square

Saddle Hip or Ridge Slate Sizes

Saddle hip or ridge slate sizes

FAQ Quick Support Guide

  • Is it possible to add snow guards to an existing slate roof?

    Yes, there are retrofit snow guard solutions made for installation on roofs after they are installed.

  • Is there a guideline for maintaining snow guards?

    Similar to your slate roof, it is advisable to schedule an annual inspection to examine the snow guards for any damage or issues, particularly after experiencing significant snowfall and ice accumulation during the winter season.

  • What are snow guards made of?

    Snow guards come in aluminum, zinc, copper, lead-coated copper, brass and steel. Commonly used pad style snow guards are also available in a variety of colors.

  • What is the difference between snow guards and snow rail system?

    Snow guards are individual pieces which are distributed on the roof. Usually beginning up from the eaves and moving upward. The positioning will differ based on the slope of the roof and the weight of the snow. They may feature a classic pad shape or decorative patterns like flowers, birds and stars.

    A snow rail (pipe-style) retention system serves as a robust barrier and more frequently found on commercial properties. These systems consist of various components: pipes, end caps and collars, couplings, and a base plate that replaces a slate shingle. These bar rail systems may consist of one, two or even three railings to prevent snow from avalanching off a roof.

  • What is the function of a snow guard?

    Snow guards are placed at strategic locations on a slate roof to manage the way snow is held in place to prevent sudden snow slides. Snow retention devices protect your gutters, landscaping and the safety of pedestrians. If you reside in a region that experiences snowfall each winter and your roof has a pitch steeper than 8:12, you might want to think about installing a snow retention system.

Slate Size Charter

Starter Slate Size Chart

Starter course slates are installed horizontally (long sides parallel to the eave) with the bevel edge down.

Starter Length:  Field slate exposure plus headlap, rounded up to the nearest inch

Starter Width:  Double the field slate width

Slate Size Charter

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