Slate Roofing in Toronto & the GTA

If your house has a slate roof, you own something most GTA homes will never have: a roof that can outlast the mortgage, the furnace, and possibly you. Natural slate runs 75 to 150 years depending on the stone. Which is why the worst thing that happens to slate roofs isn't weather — it's a contractor who doesn't know slate, walking on it, smearing tar on it, or talking an owner into tearing off a roof that needed twenty tiles and some copper.

Slate work is its own trade. Broken slates come out with a ripper and go back in on hooks or nails, matched for thickness and colour. The metal usually fails first — valleys, flashings and fasteners wear out decades before the stone does, so a "failing" slate roof is often a metalwork project wearing a scary disguise. Real slate is also heavy, which is why new installations need the framing checked, and sometimes a structural review, before anyone orders stone.

We quote slate roof repair, restoration, and full natural slate installation, and we'll be blunt about which one your roof needs. On heritage roofs in older Toronto, Hamilton and Niagara neighbourhoods, keeping the original stone is usually both the right call and the cheaper one. Heritage-designated homes may need municipal heritage approval before visible roof materials change — we'll flag that early, not after.

• Roof assessment distinguishing failed slates from failed metalwork
• Individual slate tile replacement using rippers and hooks, matched to your existing stone
• New copper or steel valleys, flashings and chimney details where the metal has worn out
• Ridge and hip restoration, including rebedding or replacing ridge treatment
• Full natural slate installation on suitable structures, nailed to spec on proper underlayment
• Structural review coordination where new slate's weight requires it
• Snow guard installation over entrances and eaves
• Careful staging and roof protection so the work doesn't break more than it fixes

• Repair versus restoration versus full replacement — three very different projects
• Slate type and source, since matching a century-old Welsh or Vermont stone takes sourcing
• Extent of metalwork renewal — copper valleys and flashings are often the real job
• Roof height, pitch and access, as slate roofs are typically steep and staging-heavy
• Structural capacity for new installs, given real slate's weight
• Heritage approval requirements on designated properties
• How much sound existing slate can be salvaged and re-laid

Every home is different, so we don’t publish flat prices — the quote is free and based on your actual job.