Structure & envelope

Roofing

A roof is the one component a buyer will ask the age of before they ask almost anything else, and the one where the least visible part of the job — flashing, ventilation and the deck underneath — determines whether it lasts.

Scope

What the work is—and what it isn’t.

Most disputes begin with an exclusion nobody read. Confirm both columns against any quote you receive before comparing prices.

Normally included

Tear-off and disposal of existing layers
Deck inspection and replacement of damaged sheathing
Ice and water shield at eaves, valleys and penetrations
Underlayment, shingles, ridge and starter
Flashing at walls, chimneys and penetrations
Ventilation — intake and exhaust

Normally excluded

Structural repair
Eavestrough replacement, unless quoted
Chimney masonry
Attic insulation

What moves the price

Why two quotes for the same room differ.

These are the decisions and conditions that actually drive cost on this trade. Understand them and a wide spread between quotes usually explains itself.

01
Number of existing layers to remove and disposal volume.
02
Roof pitch and height — steeper and higher means staging, safety systems and slower work.
03
Complexity: valleys, dormers, skylights and penetrations each add flashing and labour.
04
Sheathing condition, which nobody knows until the tear-off. A good quote states a per-sheet price in advance.
05
Shingle product and warranty tier.
06
Ventilation correction, which is frequently needed and frequently omitted.

Cost ranges

What it costs in Halton.

Cost ranges for this trade have not been published yet.

Rather than repeat a national average that means nothing in Halton, this table stays empty until the figures are ones I have priced myself. The cost drivers above are the part that matters most anyway—they explain why the numbers vary.

If you want a real number for your property, that is what the walkthrough is for.

Book a free walkthrough →

Before you sign

What the quote must contain.

If any of these is missing, ask for it in writing before you compare prices. A quote that cannot answer these questions is not a quote—it is an estimate wearing a suit.

Shingle manufacturer, product line and warranty term
How far ice and water shield extends, in feet from the eave
A stated per-sheet price for replacement sheathing before work starts
Ventilation plan — intake as well as exhaust
New flashing, not re-used flashing, at walls and chimneys
Proof of WSIB coverage and liability insurance, specifically for roofing
Warranty split between material and workmanship, each with a term

Walk away

Red flags on this trade.

None of these are matters of taste. Each one has a specific consequence, and each is visible before you commit any money.

Shingling over an existing layer to save money
Re-using old flashing
No mention of ventilation
No WSIB clearance — roofing is high-risk work and an uninsured fall becomes your problem
A large deposit before materials are delivered

Before the final payment

Ridge and valley lines straight from the ground
New flashing visible at every wall and chimney junction
Attic checked for daylight and for new staining after the first heavy rain
Site magnet-swept for nails
Written warranty in hand, registered with the manufacturer where required

Agree a written deficiency list before releasing the last payment. It is the only leverage that survives the end of a job.

If you are selling

What this does to a sale.

Buyers price a roof by remaining life, not by appearance. A five-year-old roof with paperwork is worth more at the negotiating table than a fifteen-year-old roof that 'looks fine'.

Ready to hire

I’ll give you one or two names, not a directory.

Contractors on the bench supply current WSIB, liability insurance and licence documentation, and I have walked their finished work. No referral fee is accepted from any of them.

Request an introduction See the vetting standard →

Also worth reading

Reading a quote & protecting yourself→All trades and specialties→Free renovation walkthrough→

A straightforward first conversation

Thinking about roofing?

Tell me where you are in the process. We’ll discuss the property, the market, and the questions that matter most to you.

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