Roof replacement

When replacement is usually the honest answer

Any one of these on its own may not decide it. Several together usually do.

• The covering is at or near the end of its expected service life.
• Deterioration is general rather than local: granule loss across slopes, widespread curling, brittle or cracking shingles.
• You have repaired leaks more than once, in different places.
• There are already two layers up there, so the next job is a full tear-off regardless.
• The deck is soft, stained or delaminated across an area rather than at one point.
• Storm damage covers whole elevations rather than a few shingles.
• Roof age is affecting insurability or a pending sale.

What a professional establishes before quoting

• Roof area in squares, measured on the roof surface with the pitch multiplier applied.
• Pitch, which decides both material quantity and whether the crew needs staging and fall protection.
• How many existing layers come off, which doubles or triples tear-off labour and disposal.
• Deck condition where it can be seen, and an expected allowance for what cannot.
• Complexity: valleys, dormers, skylights, chimneys and the number of separate roof planes.
• Ventilation: what intake and exhaust exist now, and what the new system will leave you with.
• Local requirements: permit, inspection, ice barrier line, wind uplift fastening pattern.

What the work involves

1. 01

   Protect the site

   Landscaping, driveway and anything under the eaves. Ask where the dumpster sits and what happens to the lawn.

2. 02

   Tear off the old covering

   Down to the deck. This is where a layover would have hidden everything that follows.

3. 03

   Inspect and repair the deck

   Soft or delaminated sheathing is cut out and replaced, priced per sheet at the rate agreed before the roof was opened.

4. 04

   Install underlayment and ice barrier

   Ice barrier at eaves and valleys where local history or code requires it. This is a line that quotes quietly differ on.

5. 05

   Flashing and edge detail

   Drip edge, step flashing at sidewalls, kick-out at wall terminations, valley metal, chimney and skylight flashing. Replaced, not reused.

6. 06

   Install the covering

   Starter course, field, hip and ridge, to the manufacturer’s fastening pattern. Nail count, placement and depth are what wind finds first.

7. 07

   Ventilation

   Ridge or other exhaust, balanced against intake at the soffit. Getting this wrong shortens the life of everything above it.

8. 08

   Clean up and walk through

   Magnet sweep for nails, gutters cleared of debris and granules, and a look at the finished details before the final payment.

Covering options, briefly

The full comparison is on the materials guide. What matters at quote stage is that weight is a constraint, not a preference.

What moves the price

Two houses with identical footprints can differ by a factor of two once pitch, layers and access are counted.

HyreRoof publishes no national average price for this work. Regional labour, disposal and material rates move it far enough that a single figure would mislead.

What to ask before you sign

• How many squares, and how did you measure them?
• How many layers are coming off, and is disposal included?
• What is the deck repair rate per sheet, and what allowance have you assumed?
• Which underlayment, and is ice barrier included at eaves, at valleys, or both?
• Which flashing is being replaced, and which are you planning to reuse?
• What intake and exhaust ventilation will I be left with?
• Who pulls the permit, and is the fee in this price?
• What are both warranty lengths, material and workmanship, separately?
• What is the payment schedule, and will you provide lien waivers at each stage?
• Who authorises additional work mid-job, and up to what amount?

The full ten-point checklist is on choosing a roofer.

What to have ready

• The age of the current roof, and whether it is one layer or two.
• Any documentation from the last replacement, including the warranty.
• Whether a claim is involved, and your policy declarations page if so.
• Photographs of any interior staining, dated.
• Whether you have solar, satellite or anything else mounted on the roof.

Where this goes wrong

Common questions

How long does a roof replacement take?

Tear-off and installation on a typical single-family home is usually a matter of days, weather permitting. The longer part is what surrounds it: getting on the schedule, the permit, material lead times and the inspection afterwards. Deck damage found after tear-off is the most common reason a job runs past its quote.

How much does a new roof cost?

There is no national answer worth acting on, and we deliberately do not publish one. The total is driven by area, pitch, how many layers come off, deck repairs found after tear-off, the covering and accessories, complexity, access and permit costs. Regional labour and disposal rates move the result far enough that a single figure misleads more than it helps.

Do I need to be home during the work?

Not usually, but someone should be reachable. Deck damage, unexpected flashing conditions and weather decisions all come up mid-job and need an answer. Agree in advance who authorises additional work and up to what amount, in writing.

Can a new roof go over the old one?

Sometimes, and it is usually a false economy. Codes limit how many layers may be stacked, a layover hides the deck so nothing underneath can be inspected, it adds weight, and it typically shortens the life of the new covering.

What happens if it rains mid-job?

Crews work in sections and dry the roof in at the end of each day, so an open deck is not usually left overnight. Your contract should say what happens if weather opens the roof and who carries the cost of resulting damage. Ask before you sign.

What is the difference between the two warranties?

The manufacturer warrants the material against defects. The contractor warrants the installation. They are separate documents with separate lengths, and the majority of roof problems are installation problems, which the material warranty does not cover.

Is it worth replacing a roof before selling?

It depends on whether the roof is a deal-breaker or a negotiation item. An old roof can affect financing and insurability, which stops sales. A merely dated one usually becomes a price adjustment. A local agent and your buyer’s likely insurer will tell you more than a general rule.

Sources

• Roof assemblies and rooftop structures (IRC Chapter 9), International Code Council. Checked September 18, 2026.
• Roofing technical resources and installation standards, National Roofing Contractors Association. Checked September 18, 2026.
• FORTIFIED Roof standards and severe-weather research, Insurance Institute for Business & Home Safety. Checked September 18, 2026.