Cambridge, ON repair guide
Roof Repair in Cambridge: Slate and Tin on the Old Towns, Same-Year Shingles on the New Streets
Cambridge has two kinds of roof and few roofers who do both well. In Galt, Preston and Hespeler, the 1850s to 1900s stone and brick houses carry steep roofs, dormers, chimneys and, under later shingles, the slate and tin they were built with; many are heritage-designated, which changes what a replacement can look like. On the newer streets from Clemens Mill to Hespeler’s north end, builder roofs from the 1990s and 2000s were shingled in the same seasons and are wearing out together. This guide covers what fails on each, what designation means, how to handle storm damage, and what Ontario requires of the contractor.
By Michael, founder, fixmystuff.ca · Reviewed and updated 2026-09-11 · About 7–10 minutes
Old-town roofs
A Galt stone house built in 1860 may have slate on the front slope, tin on a rear addition and three layers of asphalt over the original cedar on the rest, with brick chimneys that stopped being used decades ago and dormers whose step flashing has been patched with tar for a century. Leaks start at those junctions, not in the field. Slate and tin can be repaired by a roofer who knows them and can last far longer than shingles; replaced with asphalt, they lose the house its character and, on a designated house, may not be permitted on the visible slopes.
Weight matters too: a deck that carried slate for 150 years may have rot at the eaves, and a roofer should look at it from the attic before quoting.
| Roof type | Common Cambridge failure | Who to call |
|---|---|---|
| Slate, old town | Slipped or broken slates, failed flashing | Slate roofer |
| Tin or standing seam, old town | Rust, failed seams, paint | Metal roofer |
| Asphalt over old layers | Weight, hidden decay, junction leaks | Roofer with heritage experience |
| Builder asphalt, post-1990 | Wind-lifted tabs, worn valleys, pipe boots | Shingle roofer |
| Unused brick chimney | Deteriorated mortar, missing cap | Mason or roofer with masonry |
Heritage designation and permits
Cambridge has hundreds of designated heritage properties and heritage conservation districts in the old cores. Designation does not stop you repairing or replacing a roof, but changes to roofing material, colour and profile on the visible slopes may need a heritage permit from the City, and a slate roof replaced with asphalt on a designated front elevation can be refused. Ask the City’s heritage staff before ordering materials, and ask whether any heritage grant program is currently offered; Cambridge has offered grants for heritage restoration work in the past.
Building permits are separate: like-for-like re-shingling generally does not need one, but deck replacement, structural changes and new skylights can.
- Heritage designation status checked with the City
- Roof materials identified, layer by layer
- Attic inspection for deck rot at the eaves
- Chimney condition, if unused
- WSIB clearance and liability certificate from the roofer
Subdivision roofs and storm damage
On the newer streets, builder-grade shingles with a minimal nailing pattern lift in the wind off the Grand valley, valleys wear through, pipe boots crack, and by fifteen to twenty years the shingles curl and shed granules across the roof. After a storm, tarp any open area, photograph everything, open an insurance claim before agreeing to permanent work if the damage is more than a few tabs, and get quotes from Cambridge companies with a permanent address. A roofer who knocks after a storm or asks you to sign an assignment of benefits is asking for control of your claim.
What Ontario requires, and what you should
Roofing is not a licensed trade in Ontario, so ask for a certificate of liability insurance naming the company and a WSIB clearance certificate, and verify both; a worker injured on your roof without coverage becomes your liability. Ontario’s Consumer Protection Act gives you a cooling-off period on contracts signed in your home. A written contract should name the materials, the flashing work at every chimney and dormer, the underlayment and ice-and-water membrane, the number of layers removed, deck inspection, disposal and a payment schedule tied to milestones, with the workmanship warranty separate from the material warranty.
Questions to ask before booking
- Have you worked on slate, tin or heritage-designated roofs, and can you show me examples in Cambridge?
- Is this house designated, and have you dealt with the City’s heritage permit process?
- Will you inspect the deck from the attic before quoting?
- Can I see your liability certificate and WSIB clearance letter?
- What are the workmanship and material warranties, and what is the payment schedule?
Frequently asked questions
Can I replace slate with asphalt shingles on a designated Cambridge house?
Not necessarily. On the visible slopes of a designated property, a change of roofing material or colour may need a heritage permit and can be refused. Ask the City’s heritage staff before ordering materials.
Where do old Galt roofs usually leak?
At the chimneys, dormers, valleys and the junctions between old materials and later additions, long before the field of the roof fails. A roofer with heritage experience should find the exact point.
Do I need a permit to re-roof in Cambridge?
Usually not for like-for-like re-shingling. Deck replacement, structural changes and new skylights can need a building permit, and designated houses may need a heritage permit for visible changes.
How do I check a roofer’s insurance in Ontario?
Ask for a certificate of liability insurance naming the company and a WSIB clearance certificate, and verify both with the issuer.
Nearby communities
Waterloo Region roofers cover Cambridge, Kitchener and Waterloo from the same shops, and heritage roofers who do slate and tin work the old cores of Galt, Guelph and Brantford alike. Permits and heritage rules are municipal.
Browsing more broadly? Start from the Cambridge repair hub for every local guide in one place.
Sources and further reading
- City of Cambridge: heritageDesignated properties, heritage permits and any grant program.
- City of Cambridge: building permitsWhen roofing work needs a permit.
- WSIB: clearance certificatesConfirming a contractor’s workers’ compensation coverage.
- Consumer Protection OntarioCooling-off periods and contract rules for work sold in your home.
Prices, programs, and acceptance rules can change. Check each source and obtain a written local quote before deciding.