What should a roof replacement include? If you’re comparing contractors in Georgetown, that is the hardest question to answer, because a cheaper quote often leaves out the parts you can’t see from the ground. A professional job is a complete roofing system, not new shingles laid over old problems. This guide walks through each stage, from inspection to cleanup, and shows how the scope changes for shingle, metal, and flat roofs, so you can hold any proposal up against it.
Along the way, we point out the details that Georgetown’s heavy snow and repeated freeze-thaw cycles make more important, like ice and water shield, drip edge, and attic ventilation. Above It All Roofing also flags the warning signs in a quote, so you know what to ask before you sign. Use it as a checklist when you read your estimates side by side.
Key Takeaways
- A professional replacement covers the deck, protective layers, shingles, flashing, ventilation, and cleanup, not just shingles.
- Hidden conditions like soft decking should be addressed in writing before work starts.
- Metal and flat roofs follow the same sequence but need their own materials and details in the scope.
- Every quote should name its materials, layers removed, and exclusions.
- Permits and warranty terms belong in the paperwork, not in verbal promises.
What a Professional Roof Replacement Actually Involves
A real replacement starts with a written scope and ends with a final inspection. In between, the old roof comes off, the structure is checked, new protective layers go down, and the roofing material, flashing, and vents are installed as one connected system.
Full Tear-Off vs. Overlay
A full tear-off strips the old roofing down to the deck, so the crew can see what’s underneath. An overlay puts new shingles over the old ones, which hides problems and adds weight. Most roofs we see have already reached the end of their service life, and how long roofs typically last depends heavily on whether the deck underneath was ever inspected. We recommend a full tear-off in nearly every case.
Why Georgetown’s Climate Shapes the Scope
Georgetown gets heavy snow, hard freezes, and repeated thaw cycles. Those conditions push water under shingles at the eaves and valleys, which is why protective layers matter more here than in milder regions. If your current roof already shows icicle buildup or interior staining each winter, ask about ice dam removal alongside the replacement so the cause is addressed too.
Inspection and Written Scope Before Work Begins
Before anyone removes a shingle, you should receive a written scope that says what will be removed, installed, and repaired. The inspector should check the roof surface, edges, valleys, flashing, and penetrations from outside, then look at the underside of the deck, insulation, and vents from inside the attic.
On a Glen Williams home last fall, the attic check showed dark staining on the deck near a chimney that looked perfectly fine from the driveway. That finding changed the scope before the job began, which is exactly what an inspection is for. Ask which findings are confirmed and which can only be verified once the old roof is off.
Roof Deck Inspection and Repairs
The deck is what every other layer attaches to, so it must be solid. The crew should check it as the old roof comes off, not just before, because damage often hides under the roofing until the last layer is removed.
What Happens When Damaged Decking Is Found
Soft, stained, or rotted panels need replacing before new materials go down. A proper quote explains how damaged decking is documented and approved, so there are no surprise charges. If you want to understand what the crew is looking at, our breakdown of plywood versus OSB decking explains how each material fails and what repairs involve.
Underlayment, Ice and Water Shield, and Drip Edge
These three components do the unseen work of keeping water out, and they’re the first things a low-ball quote skips.
Where Each Component Goes on the Roof
Underlayment covers the whole deck as a secondary barrier. Ice and water shield, a self-adhered membrane, goes along the eaves and in valleys, where water backs up in winter. Drip edge is metal along the roof edges that directs water into the gutters instead of behind them. Your quote should state where each one is installed. For a closer look at the membrane, read about ice and water shield protection and why coverage area matters.
Shingles, Flashing, and Ventilation
Shingles are the visible part, but flashing and ventilation decide how long they last. Ask for the manufacturer and product line by name, such as CertainTeed Landmark or GAF Timberline, rather than accepting “architectural shingles” as a description.
Flashing at Chimneys, Skylights, and Valleys
Water enters wherever the roof meets something else. Flashing around chimneys, skylights, vents, and valleys should be replaced or clearly documented as reused. If a past leak already traced back to one of these spots, a separate roof leak repair may be worth discussing while the roof is open.
Ridge Vents and Attic Airflow
A new roof over a poorly ventilated attic ages faster, because trapped heat and moisture cook the shingles from underneath. Intake at the soffits and exhaust at the ridge should work together. If your attic runs hot in summer or shows frost in winter, ask whether attic ventilation repairs and installation are part of the scope.
Metal and Flat Roof Replacements: How the Scope Differs
Not every Georgetown home has an asphalt roof. Metal and flat roofs follow the same overall sequence of inspection, tear-off, deck check, protective layers, and cleanup, but the materials and details change. A scope written for shingles shouldn’t be reused for either one.
Metal Roof Replacement Considerations
A metal roof still starts with a solid deck and the right underlayment beneath the panels, and the old roofing should be fully removed rather than assumed to be fine. Ask which panel system is proposed (exposed fastener or standing seam), how thermal movement is handled, and whether snow guards are included. Georgetown’s heavy snow can slide off a smooth metal surface in sheets, so retention above entrances and walkways matters. Flashing at chimneys, vents, and valleys is detailed differently than with shingles, so the quote should describe it. Our crews handle metal roof replacement from tear-off through panel installation, and the same written-scope rules apply.
Flat Roof Replacement Considerations
Flat and low-slope roofs rely on a membrane, commonly TPO, EPDM, or PVC, rather than overlapping shingles, so the quality of the seams, edges, and drainage decides how long they last. A proper replacement checks for ponding water, wet insulation beneath the membrane, and the condition of drains and edge flashing before the new system goes on. On a Georgetown bungalow with a flat-roofed rear addition, the shingles were in good shape but the addition’s membrane had pooled water at one corner for years. Replacing only that section, and correcting the wet insulation under it, let the owner avoid redoing the shingled part of the roof. If part of your home has a low-slope section, ask whether the quote lists flat roof replacement as its own line item with the membrane type named.
Cleanup, Disposal, and Final Inspection
A finished roof isn’t the end of the job. The crew should haul away all old material, protect landscaping, siding, and windows during tear-off, and walk the property before they leave. Ask whether a magnetic nail sweep of the lawn, driveway, and flower beds is included. A final walk-through with the foreman, covering flashing, vents, and edges, is the last quality check.
Permits, Warranty, and Paperwork
Permit rules depend on the work being done. Georgetown falls under the Town of Halton Hills, so confirm requirements with the town and ask your contractor who is responsible for any permit.
Workmanship Warranty vs. Manufacturer Warranty
These are two separate things. The manufacturer covers the roofing material against defects. The contractor’s workmanship warranty covers the installation, and ours is a 10-year installation warranty. Ask to see both in writing, with their terms and exclusions, before you sign.
Red Flags: What a Roofing Quote Should Never Leave Out
Be cautious of a quote that gives one total with no breakdown, doesn’t mention underlayment or drip edge, or says nothing about decking, disposal, or cleanup. Vague wording like “complete roof system” without named materials is another warning sign.
Before you sign, ask how many layers are being removed, what deck repairs are included and how extra ones are approved, which flashing and edge details are specified, and what is excluded. Our guide to what a written quote should contain lists the specific items to look for. Keep the answers with your contract.
Reading quotes and not sure what’s missing? Book a free roof inspection and we’ll walk through the scope line by line with you.
Why Georgetown Homeowners Choose Above It All Roofing
Our office is at 55 Sinclair Avenue in Georgetown, and we’ve worked on roofs across Georgetown and Halton Hills for over 25 years. We’re WSIB-insured and a member of the Bryan Baeumler Approved Contractors program. Every proposal lists materials, layers removed, deck contingencies, and exclusions in writing. Our approach to full roof replacements runs from inspection through final cleanup. Whoever you hire, base the decision on the written scope and how clearly your questions are answered.
FAQs
Does a roof replacement include new decking?
Only where the existing deck is damaged. Ask how damaged panels are documented and approved before work begins.
Is ice and water shield part of a standard replacement?
It should be along the eaves and valleys at minimum. Confirm the coverage area in writing.
Should the old shingles always be torn off?
In most cases, yes. A tear-off lets the crew inspect and repair the deck, which an overlay hides.
Does a metal roof replacement need a different scope than shingles?
Yes. Panel type, underlayment, snow retention, and flashing details all differ, so the quote should describe them separately.
Can a flat section be replaced without redoing the whole roof?
Often, yes. A low-slope addition or porch roof can usually be replaced on its own, as long as it’s priced and detailed as a separate item.
Who handles permits?
Confirm with the Town of Halton Hills whether your project needs one, and agree in writing who obtains it.
What does cleanup usually involve?
Hauling away old material, a magnetic nail sweep, and a final walk-through with the foreman.
Ready to compare a quote or get a second opinion? Call 647-771-1554 for a free roof inspection and a written scope for your home, and ask about financing options if the project is larger than you planned for.
