On average, North American produced S-1 rated roofing slate will cost $600-$800 USD per square (100 square feet) per square foot for a standard thickness 1/4”-3/8” roof. Color, size and availability are all contributing factors to this range of roofing slate material costs. Historically, semi-weathering gray/green (Sea Green) has been one of the less expensive slates, due to its easy working characteristics and the relative abundance of stone deposits; while unfading red, due to its difficult working characteristics and relative rarity, can range upwards to over $1,000 USD per square. In general, the cost of weathering or semi-weathering slates are less expensive than unfading slates, although both will give comparable service life. The cost of transportation of roofing slate from the producer to the job site must also be taken into consideration. These costs may range from $15 – $80 USD per square depending on quantity shipped, the distance to destination and access to the job site. The delivery of a quality, North American produced, S-1 rated roofing slate to your job site at this point will yield a roof with a minimum service life of more than 75 years and represents a solid, cost effective and aesthetic investment in your building. Once the slate has arrived on site, the cost of installing a slate roof system by a qualified contractor depends on a number of factors, including roof complexity, roof pitch, accessibility, the details of hips, ridges and valleys, flashing materials and regional wage, insurance and benefit variations. Installation costs on a simple gable to gable roof with few or no roof penetrations may cost $15 USD per square foot. Installation on a more elaborate and complex roofscape may cost $30 USD per square foot or more. Having a qualified slate roofing contractor install your slate roof system including underlayment, ice dam protection membrane, flashing and valley metal, drip edge, slate, gutters and downspouts will be the key to your 100 year roof. These are the people who can assess your roof or roof plans and give you a budget price for the installed cost of a complete roof. Should natural roofing slate be outside your budget, these same roofing contractors can recommend suitable alternatives for your building. North Country Slate would welcome the opportunity of providing you with information on our natural roofing slate products and we would be pleased to refer qualified slate contractors in your area to you to get you started on your way.
Slate Roof CAD Installation Details
In conjunction with the National Slate Association, architects, specifiers and design professionals can rely on CAD drawings for all slate-related details found in the National Slate Association Slate Roofs Design and Installation Manual. These detailed drawings and technical notes will provide you with the solutions for starting your slate roofing project on the right path before your project is underway. With this resource and our technical sales representatives, you will improve the quality of designs, increase productivity, and meet your goals more efficiently with North Country Slate’s quality materials.
Eave Installation
Closed Valley
Open Valley
Metal Hip
Saddle Hip
Mitered Hip
Metal Ridge
Saddle Ridge
For more slate roofing installation and slate roofing repair information visit the National Slate Association; Slate Roofs Mobile Field Guide
