How Does a Slate Roof Work?

wooden house with a slate roof in the village

Learn More About a Slate Roof

Deciding on the type of roofing material that will be both aesthetically pleasing and long lasting can be a challenge. However, premium roofing materials can allow for more durable protection that will last for decades. With a slate roof not only are you getting the highest roof life, you’re getting a material that will protect your roof from severe weather and fires. Ultimately, getting a slate roof will be a commitment. Be sure to get into contact with your local qualified roofing company to see if a slate roof is right for you. Until then, here is a little background information surrounding a slate roof that may prove useful to you.

How long does a slate roof last?

A hard slate roof can last anywhere from 75 to 200 years and soft slate from 50 to 125 years. It’s important to keep in mind what type of slate roof you have before a repair is made as they will differ.

Are slate roofs expensive?

A slate roof is among the best roofing materials to have yet due to superior quality they will be a more expensive material to install than other roofs. A square foot of the area of your house can cost several hundred dollars in comparison to a few hundred with other roofing materials. However, there with typically be fewer repairs and with a longer amount of time to wait between replacements due to decades of roof life this can make up for costs in the long run.

Are slate roofs good?

A slate roof is a great roofing option to consider due to their long life and protective abilities. They are quite an investment yet in the long run they are worth it. Essentially they are waterproof and weather resistant materials that can withstand high winds, rain, and heavy snow. Since slate has low water absorption it is resistant to frost damage and breaks from freezing. Other benefits include them being completely fireproof and mold resistance. How a slate roof works is that that they have a down slope that’s parallel with the length of the shingle to the next lower shingles. Therefore, water migration is controlled by the angle of the roof’s slope, the steeper the slope the less water migration there will be.

What is the minimum angle for a slate roof?

The minimum angle for a slate roof is recommended by BS 5534 to be 20 degrees. SSQ has however developed successful slate roof systems that will allow for a roof’s pitch to be lower at 17.5 degrees. In some circumstances, going as low as 15 degrees in certain areas can allow for ‘unexposed’ conditions. 

Do slate roofs need ventilation?

A slate roof will need to have vents at both the ridge level and at both eaves according to the NHBC. Ventilation requirements will vary based on the building.

slate roofing tiles on uk roof

What is the best slate for roofing?

Perhaps the best natural slate material in the world for a slate roof is considered by many to be Welsh slate. This slate material can come in either blue-grey or heather (purple) color options. Another slate material to consider is Penrhyn slate which has a soft purple/blue appearance and is typically expected to last more than 100 years.

How heavy is a slate roof?

  • Slate Roofing, 3/16-Inch Slates, 7 per square foot (lb/ft2)
  • Slate Roofing, 1/4-Inch Slates, 10 per square foot (lb/ft2)
  • Slate Roofing, 1/2-Inch Slates, 20 per square foot (lb/ft2)
  • Slate Roofing, 3/4-Inch Slates, 30 per square foot (lb/ft2)

How do you maintain a slate roof?

A slate roof should be maintained regularly with gutters cleaned twice in the fall and once during early spring. Inspections should be done every 5-7 years and any damaged slates materials should be replaced promptly no matter the time of year.

Can you pressure wash slate roof?

A slate roof can be pressure washed with the right pressure. However many recommend not to pressure wash a roof if the blast is too strong. Pressure ashing can break apart slate or drive water under the slate which can cause a leak.

Is it OK to walk on a slate roof?

A slate roof should not be walked on after rain as it can be slippery. If the slate is crumbling or deteriorating walking also isn’t advised. Beware of the pressurized weight you are directly placing on any roofing material before you walk on them in case they break or form cosmetic damages.

Get in Touch With Your Local Roofers Regarding a Slate Roof

If you’re interested in a slate roof or require slate roof repair services get in touch with your local roofing company. They will best to able to determine which materials will work best on your roof based on your particular roofing specifications. What’s more, if any repairs or replacements need to be made, roofers are certified and trained to implement the right procedures with your roof that will keep materials safe and in good condition. A slate roof will be a great aesthetic to add to your property with protection that can last well into the next generation. Get assistance with a slate roof with a professional roofer today.

If you’re interested in a slate roof in Chesterfield and St. Louis, MO call (314) 786-3732 with ProCraft Exteriors!