If you’re choosing between different roofing materials, you may be wondering which ones are better for water resistance. Do you need to waterproof a slate roof to prevent water damage? Let’s discuss everything you need to know.
SLATE IS NATURALLY IMPERMEABLE TO WATER
Slate is completely water-resistant, does not require any additional waterproofing to protect your roof substrate and other roof elements. If you hire the right slate roofing companies in Sydney, your roof will be completely waterproof for years to come.
This is because slate is a nonporous natural stone. Like other types of stone, it does not readily absorb water. While slate can absorb a small amount of water, it has a very low water absorption index of 0.4%. For all intents and purposes, it’s completely waterproof.
The fact that it absorbs so little water is also great for resistance to freezing. As in, with little water being absorbed, the slate does not expand and contract much when freezing and thawing. While freezing temperatures are extremely rare in Sydney, this is still something to bear in mind.
SLATE HAS AN EXTREMELY LONG LIFESPAN WITH PROPER INSTALLATION
Beyond its waterproof benefits, slate also offers an extremely long lifespan. Typically the minimum roofing requirement for this material to ensure proper water and weather resistance is a pitch of 20º.
Natural slate is very resistant to the elements. As a natural stone, slate is not worn down over time, and continues to offer excellent protection for decades. In fact, it’s common for slate tiles to last up to 100 years.
If you are interested in the best possible lifespan and longest results from your roof installation. NSW, slate is an excellent option. While you may pay a bit more up front compared to some other materials like shingles, slate is an investment. A Slate Roof will pay off in the long term, protecting your home and giving you peace of mind.

DAMAGED TILES CAN STILL CAUSE WATER DAMAGE – INSPECT YOUR ROOF REGULARLY
Slate are waterproof and do not require any resealing or future waterproofing. But that doesn’t mean that your roof is completely maintenance free. Just like any other roof material, falling tree limbs, extreme weather conditions, and wear & tear, will damage slate.
Because of this, it’s a good idea to have your roof inspected regularly. We recommend looking at your roof regularly, inspecting for any cracked, dislodged, or damaged slate.
You should also keep an eye out inside your home for any signs of leaks in attics or other areas that are directly below your roof. Scheduling a professional roof inspection every 1-2 years is also recommended, as a pro may catch damage to tiles and flashing that you may not be able to pick out from the ground.
CHOOSE SLATE FOR YOUR ROOFING PROJECT TO GET THE BEST DURABILITY!
If you have the budget for natural slate tiles, you’ll enjoy a roof that can easily last 100+ years with proper installation, care, and maintenance. Want to learn more about slate in Sydney and NSW? Wondering if it’s right for you?
NSW Slate Roofing is here to help. As master slaters in Sydney, we can provide you with expert advice on the use of slate in your next roofing project, provide you with a quote, and handle the entire place of roof replacement or installation. Contact us now to schedule a consultation.