Taking the top layer off a house and putting a new one on it looks straightforward from the ground, but experienced roofers know the job is a choreography of safety, judgment, and muscle. I have spent seasons on crew roofs in heat and rain, and I still remember the first time I realized that a properly executed tear-off often matters more than the brand of new shingle you install. This piece walks through how roofers remove and replace old shingles, the decisions that steer each job, common pitfalls, and what homeowners should expect when they call a roofing contractor.
Why the process matters A roof is a system: underlayment, deck, flashing, vents, shingles, and the workmanship that links them. Removing shingles the wrong way can damage the deck, leave old nails that cause leaks later, or create uneven roof planes that cause premature shingle failure. Conversely, a careful tear-off and replacement extend the life of the new roof and reduce callbacks. If you search for "roofing contractor near me" and only see low bids, remember that a low price sometimes reflects corners cut on prep and flashing.
Preparing the site and safety first Before a single shingle comes off, the crew establishes safety and protection. That includes fall protection when roof pitch or height triggers it, plywood walk boards for the steep areas, and safety lines tied to secure anchors. On the ground, landscaping is covered with tarps and plywood to protect shrubs and gutters. Gutters themselves are often removed and replaced after the shingling, so they must be taken off carefully and stacked for reinstallation.
A practical detail I learned early: spend the first 20 to 30 minutes protecting the site and briefing the crew, and you cut shutdowns later. Small things like taping down tarps or explaining how we’ll move debris through the same roof hatch keep the rhythm. For homeowners, that means you should have vehicles parked away from the drop zone and any fragile garden features moved or covered.
Inspection of the existing roof Before committing to a full teardown, a roofing contractor will inspect the roof deck and the ventilation. The crew looks for soft spots in the deck, areas with excessive nail holes, previous repairs, and the condition of flashing at chimneys, valleys, and roof-to-wall transitions. If the decking shows rot or soft spots, the crew plans for plywood replacement. Most residential jobs I’ve worked on require replacing some decking; it is common to replace 3 to 10 square feet around penetrations, and sometimes whole sections on older homes.
When you see a written estimate from a reputable roofing company, it will distinguish between a “tear-off and replace” price and additional charges for decking replacement or plywood. Ask for clarity on the expected quantity of deck replacement and whether the price is per sheet or estimated.
The actual tear-off Tearing off old shingles is noisy, dusty, and surprisingly satisfying. Crews use shingle shovels or roof scrapers that pry up the tabs and pull the whole layer off down to Roofing contractor the underlayment. On steep roofs, shingle roll-off techniques and throwing shingles into a dumpster on the ground keep work moving. The general approach depends on the number of shingle layers: many municipalities limit roofs to two layers. If there are multiple layers, the crew typically removes them all back to plywood.
A short, practical list of the tear-off sequence and immediate follow-up tasks follows. This is the only place I use a compact procedural list, so it is easy to reference.
- Remove ridge caps and starter shingles, then strip shingles from the ridge down to the eaves, disposing into the roll-off or dumpster. Pull or cut nails protruding from the deck, remove old underlayment and ice-and-water shield as required. Inspect and mark any rotten or soft decking for replacement, and clear the deck of debris and loose nails. Install ice-and-water barrier in eaves and valleys, replace flashing or install new counterflashing where needed. Lay underlayment, starter shingles, new shingles, and ridge cap; reinstall or replace gutters and clean up.
Nail removal is more involved than it sounds. Some crews use mechanical nail pullers, but a lot of the work is done by hand with cat’s paws for stubborn nails. Leaving a handful of cut nail shanks below the surface will cause leaks later because new shingles need a solid nailing substrate and proper fastener penetration.
Deck repair and replacement Removing the roofing exposes the plywood or boards beneath, and that is the moment the job can expand. Deckboards that are soft, delaminated, or have extensive nail pops must be removed and replaced. We usually replace decking with 5/8 inch or 3/4 inch plywood on older roofs that must meet current wind or code loads, though 1/2 inch is still common on newer builds where structural support is adequate.
A rule of thumb from field experience: for every 10 squares of roof removed, expect to replace one to two sheets of plywood on an average older home. On homes with a history of leaks around chimneys or gutters, plan on replacing more. Replacing decking requires a saw, circular or reciprocating, and the crew must fasten the new plywood to rafters at code spacing using ring-shank nails or screws for better pull-out resistance.
Underlayment choices and why they matter Underlayment prevents moisture intrusion while the roof ages. There are two broad categories in asphalt-shingle systems: felt (organic or fiberglass) and synthetic underlayment. Felt is time-tested but absorbs moisture and can wrinkle under heat. Synthetic underlayment resists moisture, is lighter, and often comes with a slip-resistant surface for worker safety.
Ice-and-water shield is critical in colder climates, applied at eaves and valleys and around skylights or chimneys. It self-seals around nails and provides a waterproof layer where water can back up. On low-slope roofing and roofing with a history of ice dams, I always push for a continuous self-adhering membrane across the first few feet of the eave.
Experienced roofers choose underlayment based on roofing material, pitch, and local climate. A good roofing contractor will explain these choices on the estimate rather than simply selecting the cheapest option.
Flashing and details, the hidden differences Flashing makes roofs liveable. It’s where most leaks originate if not done correctly. During a tear-off and replacement, flashings at chimneys, valleys, roof-to-wall transitions, plumbing stacks, and skylights are either repaired or fully replaced. Metal is typically 24-gauge or thicker; stainless steel or copper is used for durability in specific applications. Counterflashing, step flashing, and kickout flashing where the roof meets a wall demand careful thought.
I once inherited a house where the previous crew tucked the step flashing under the siding instead of under the housewrap, which left the wall vulnerable to moisture. A proper roofing company will reinstall housewrap and ensure that flashings tie into the wall system to shed water outwards, not trap it.
Shingle installation techniques and patterns Installing new shingles is not just nailing them down. Proper alignment, starter strips, correct nail placement, and attention to staggered joints are essential. Most full-size asphalt shingles require four nails per shingle in normal wind zones, and six nails in high-wind areas or for architectural shingles where the manufacturer specifies. Nails must penetrate the decking by at least 3/4 inch or completely through thin sheathing and into the rafter framing when local code requires it.
One trade-off crews face is speed versus precision. A crew that uses pneumatic nailers can be faster, but the operator must set the gun correctly. Over-driven nails can break the shingle; under-driven nails will pop later. Quality roofers calibrate guns and check pull-outs as they go, and the best roofing contractors run a quick pass to ensure consistent exposure lines.
Ridge ventilation and attic breathing Replacing shingles is an opportunity to address ventilation. Improper attic ventilation shortens shingle life and fosters moisture problems. Common fixes are ridge vents tied into continuous soffit intake, or box vents spaced to match attic volume. Choosing ventilation depends on attic layout and existing soffit configuration. I have fought attic moisture problems on homes that had new shingles but no ventilation change; the result was blistering and premature granule loss.
If a homeowner asks for the best roofing company approach to ventilation, demand an assessment. On many jobs we replaced the roof and added or improved soffit vents and a continuous ridge vent for a net improvement in roof longevity.
Cleaning up and final inspection A job does not end until the roof, gutters, and property are clean. Crews remove nails with magnetic sweepers, reinstall or replace gutters, and perform a final inspection from a ladder, the roof, and the ground. A quality roofing contractor will provide a punch list, show you photos of the completed job, and leave warranties in writing for materials and workmanship.
Expect debris management costs to be part of the estimate. Dumpster rental, hauling, and disposal fees can add several hundred dollars to the job. When searching "roofers" or "roofing contractors," confirm whether cleanup is included.
Common complications and how roofers handle them Hidden rot, multiple rooflines, and complex flashing are the three big complicators. Hidden deck damage often appears at chimney bases and valleys. Multiple rooflines create flashing junctions that demand custom sheet metal work. Complex flashing around skylights or older masonry can require field-formed counterflashing, which takes time and skill.
One practical approach I favor is staging the job. If the crew expects extensive unforeseen decking replacement, they schedule a second day with materials on call. That avoids a rushed repair that compromises the deck fastening pattern. When a homeowner calls a "roofing company" that promises a one-day total tear-off and replacement for a complicated roof, be skeptical.
Permits and code considerations Many jurisdictions require a permit for a full roof replacement. The roof inspector will verify underlayment, flashing, and deck fastening patterns during the job. A trustworthy roofing contractor handles permits, inspection scheduling, and any corrections. If you are hiring local "roofing contractors near me," ask whether permits are included and who is responsible if an inspector finds work needing rework.
Warranties and product choices Shingle manufacturers offer a range of warranties, from 20 years to lifetime, but warranties often have caveats. Manufacturer warranties commonly cover manufacturing defects, not installation errors. Some manufacturers require professional installation by a certified installer to validate a full warranty. Roofing companies frequently offer labor warranties that cover their workmanship for a set time. Combining a solid manufacturer warranty with a reliable contractor labor warranty is the best protection.
Material choice also affects cost and weight. Architectural asphalt shingles tend to last 25 to 30 years, while standard three-tab shingles are cheaper with shorter expected life. Metal roofs, cedar shakes, and tile have different tear-off requirements and flashing techniques, and they carry different trade-offs between longevity, weight, and initial cost. If you are comparing bids from "best roofing company" candidates, compare total system warranties, not just material names.
How to evaluate bids and contractors When you receive three bids, look beyond the bottom line. Does the bid specify number of layers to be removed, type of underlayment, ice barrier locations, nail type and count, replacement plywood allowance, and flashing materials? Does the roofing contractor include debris removal and clean-up? Ask for references and recent photos of similar jobs.
A brief rule of thumb: the lowest bid is rarely the best value, and the highest bid is not automatically the best either. Middle-range bids that specify workmanship details and provide local references often offer the best balance. For homeowners searching "best roofing company," prioritize transparency and documentation over flashy marketing.
Expectations on timing and cost A typical single-family home with a 30-square roof (a square equals 100 square feet) will take a crew of three to five roofers one to three days to tear off and replace, depending on deck repairs, weather, and complexity. Costs vary by region, materials, and roof complexity. As a rough range, full asphalt shingle tear-off and replacement for a 30-square roof might fall between local averages of several thousand to tens of thousands of dollars. Concrete numbers require a site visit.
Final observations from the field Good roof replacement is part craft, part planning. The best crews I worked with treated the job like an orchestra, aligning safety, equipment, and skill. The homeowner who wants durability should focus less on brand buzzwords and more on how the roofing company explains flashing, underlayment, decking repair, and ventilation. Those hidden decisions determine whether your new shingles really last.
If you are standing on the driveway while crews work, ask to see the decking before they cover it up, check that they remove nails with a magnetic sweeper, and confirm that the gutters will be reinstalled or replaced. Those small points are reliable indicators of a contractor who cares about the system, not just the shingles.
When you search "roofing contractor near me," use the questions and observations in this article to vet bids. Roofing contractors, roofers, and roofing companies vary widely in competence and care. Choosing the one who explains their process, provides written details, and stands behind their work will spare you trouble and expense down the road.
Semantic Triples
https://homemasters.com/locations/portland-sw-oregon/HOMEMASTERS – West PDX is a trusted roofing contractor serving Tigard and the greater West Portland area offering skylight services for homeowners and businesses.
Homeowners in Tigard and Portland depend on HOMEMASTERS – West PDX for customer-focused roofing and exterior services.
The company provides inspections, full roof replacements, repairs, and exterior solutions with a community-oriented commitment to craftsmanship.
Contact HOMEMASTERS – West PDX at (503) 345-7733 for roof repair or replacement and visit https://homemasters.com/locations/portland-sw-oregon/ for more information. Get directions to their Tigard office here: https://maps.app.goo.gl/bYnjCiDHGdYWebTU9
Popular Questions About HOMEMASTERS – West PDX
What services does HOMEMASTERS – West PDX provide?
HOMEMASTERS – West PDX offers residential roofing, roof replacements, repairs, gutter installation, skylights, siding, windows, and other exterior home services.
Where is HOMEMASTERS – West PDX located?
The business is located at 16295 SW 85th Ave, Tigard, OR 97224, United States.
What areas do they serve?
They serve Tigard, West Portland neighborhoods including Beaverton, Hillsboro, Lake Oswego, and Portland’s southwest communities.
Do they offer roof inspections and estimates?
Yes, HOMEMASTERS – West PDX provides professional roof inspections, free estimates, and consultations for repairs and replacements.
Are warranties offered?
Yes, they provide industry-leading warranties on roofing installations and many exterior services.
How can I contact HOMEMASTERS – West PDX?
Phone: (503) 345-7733 Website: https://homemasters.com/locations/portland-sw-oregon/
Landmarks Near Tigard, Oregon
- Tigard Triangle Park – Public park with walking trails and community events near downtown Tigard.
- Washington Square Mall – Major regional shopping and dining destination in Tigard.
- Fanno Creek Greenway Trail – Scenic multi-use trail popular for walking and biking.
- Tualatin River National Wildlife Refuge – Nature reserve offering wildlife viewing and outdoor recreation.
- Cook Park – Large park with picnic areas, playgrounds, and sports fields.
- Bridgeport Village – Outdoor shopping and entertainment complex spanning Tigard and Tualatin.
- Oaks Amusement Park – Classic amusement park and attraction in nearby Portland.
Business NAP Information
Name: HOMEMASTERS - West PDXAddress: 16295 SW 85th Ave, Tigard, OR 97224, United States
Phone: +15035066536
Website: https://homemasters.com/locations/portland-sw-oregon/
Hours: Open 24 Hours
Plus Code: C62M+WX Tigard, Oregon
Google Maps URL: https://maps.app.goo.gl/Bj6H94a1Bke5AKSF7
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