Downriver roof replacement, built right.
Full tear-off, a complete Owens Corning system, the permit pulled for you, and one itemized price in writing.
- Up to 50-Yr Owens Corning System Warranty* on full replacements
- 10-Year Workmanship Warranty in writing
- Permit included Most roofs done in 1–3 days
Every Guthix Replacement
Torn off to the deck
Every sheet checked. Rot is photographed and shown to you before anything is replaced.
A complete Owens Corning system
Shingles, underlayment, ice & water, starter and ridge, so the system warranty qualifies.
Permit & inspections
We pull your city's re-roof permit and schedule the inspections. It's in the price.
Clean site, full walkthrough
Magnetic nail sweep of the drive, beds and lawn, then we walk the finished roof with you.
What a Downriver roof replacement costs
These ranges come straight from Guthix's own job costs, the same pricing behind our online estimate. A common Downriver ranch with about 1,600 sq ft of roof lands around $10,100 to $12,300 on Duration.
What moves your number: roof size (by far the biggest factor), how cut-up it is, a second existing layer (about $1,000 to $1,200 more on a 1,600 sq ft roof), the shingle line, and any rotted decking found at tear-off.
| House type | Roof area | Duration® | FLEX |
|---|---|---|---|
| Small ranch or bungalow | 1,000 sq ft | $6,800 – $8,300 | $7,300 – $9,000 |
| Typical ranch | 1,300 sq ft | $8,400 – $10,300 | $9,200 – $11,200 |
| Large ranch / small colonial | 1,600 sq ft | $10,100 – $12,300 | $11,000 – $13,400 |
| Two-story colonial | 2,000 sq ft | $12,300 – $15,000 | $13,400 – $16,300 |
| Large or complex home | 2,600 sq ft | $15,400 – $18,800 | $16,800 – $20,500 |
What each row assumes: Roof area as listed, one existing layer torn off, standard roof complexity, no wood or decking replacement, no gutters. Roof area is the measured roof surface, which is usually larger than the home's living space. For a deeper breakdown, read our Michigan roof replacement cost guide, or spread the cost out with roof financing through Acorn Finance (checking your options won't affect your credit score).
What goes on your roof matters as much as what you see
- 01
Deck inspected & repaired
Old roof stripped to the wood. Soft or damaged decking is replaced, not covered.
- 02
WeatherLock® ice & water barrier
Sealed along eaves and valleys, where Michigan ice dams do their damage.
- 03
ProArmor® synthetic underlayment
A tough, water-shedding layer over the entire deck.
- 04
Starter Strip Plus
Locks the first course down against wind uplift at the edges.
- 05
Duration® architectural shingles
Owens Corning's SureNail® shingle, with an impact-resistant FLEX upgrade available.
- 06
ProEdge® hip & ridge
Matched caps that finish every ridge and hip cleanly.
Two shingle lines, one complete system
Both install as a complete Owens Corning system. Pick your color first in our Color Studio.
Owens Corning Duration®
Our standard architectural shingle and the one most Downriver homes get: a 25–30 year lifespan in Michigan, strong wind resistance, and the full color range.
Duration® FLEX
Impact-resistant, made with a rubberized (SBS) asphalt that flexes instead of cracking, for homes that see hail. Some insurers discount impact-resistant roofs, so ask yours. The price table shows both side by side.
Exactly what's included, and what isn't
Every line below shows up on your written quote, so you can compare bids line for line.
Included in your price
- Re-roof permit and the city inspections
- Tear-off of one existing layer, dumpster and disposal
- Deck inspection on every slope, with photos of anything we find
- WeatherLock® ice & water barrier at eaves, valleys and penetrations
- ProArmor® synthetic underlayment over the rest of the deck
- Drip edge, plus flashing at walls, chimneys and roof penetrations
- Starter Strip Plus, Duration® shingles and ProEdge® hip & ridge
- Ventilation check: attic intake and exhaust measured against what the roof needs
- Magnetic nail sweep and full cleanup
- Owens Corning warranty registration (qualifying complete systems) and our 10-year workmanship warranty
Priced separately, only if needed
- Rotted decking
- Hidden wood damage can't be seen from above, so it isn't in the instant price. If we find it at tear-off, you see the photos and the count first, and it's billed per board or sheet at the rate written in your quote.
- A second existing layer
- If your roof already has two layers, removing the extra one adds about $1,000 to $1,200 on a 1,600 sq ft roof. The instant quote has a checkbox for a second layer, so you can include it from the start.
- Extra vents
- If the attic has less intake or exhaust than the roof needs, the added vents are itemized. Along with decking, this is the most common reason an on-site price differs from the online range.
- Gutters
- Optional. Seamless aluminum gutters can be added to the same job and the same quote.
- Attic insulation
- A separate service. If the inspection shows a thin or uneven attic, we'll price blown-in insulation as its own line so you can decide.
How a Guthix roof replacement works
Eight steps, the same on every home. Most roofs are done in one to three days once work starts.
Free Inspection
A licensed pro checks everything on site: the roof, the layers on it, the flashing, and the attic (ventilation, moisture, daylight at the deck).
One Itemized Price
A written price with every line spelled out, set by the owner from the same pricing as the online number. If it differs, the quote shows why: a second layer, rotted decking, or an attic that needs more vents.
Permit
We pull the re-roof permit your city requires and schedule the inspections. The permit is in the price, not an add-on.
Tear-Off & Deck Check
Old shingles come off down to the wood, with tarps over landscaping. We check every sheet or plank. Rot gets photographed and shown to you before anything is replaced.
Ice & Water + Underlayment
WeatherLock® ice & water barrier at the eaves, valleys and around penetrations, ProArmor® synthetic underlayment over the rest, and drip edge at the edges.
Shingles & Ventilation
Starter Strip Plus, Duration® (or Duration FLEX) shingles, ProEdge® hip & ridge, flashing at walls, chimneys and vents, and balanced intake and exhaust venting.
Cleanup
Debris goes straight into the dumpster, and we run a magnetic sweep over the driveway, beds and lawn for nails before we leave.
Walkthrough & Warranty
We walk the job with you, then register the Owens Corning system warranty on a qualifying complete system and hand you our 10-year workmanship warranty in writing.
WarrantyTwo warranties. Both in writing before you sign.
As an Owens Corning Preferred Contractor, Guthix can register an upgraded Owens Corning warranty on a complete roof replacement, one that installers outside the Preferred program can't offer. Our own workmanship warranty covers the installation.
Read the Owens Corning warranty termsUp to 50-Yr Owens Corning System Warranty*
- Shingles plus Starter Strip Plus, ProEdge® hip & ridge, WeatherLock® and ProArmor®
- We register the Owens Corning System Protection Limited Warranty for you within 60 days
Complete Owens Corning roof replacement on a single-family detached home (20 years on other structures). Doesn't apply to repairs, partial or low-slope roofs, siding, or gutters.
10-Year Workmanship Warranty
- Covers leaks caused by how the roof was put on
- Greg answers for it directly, not a call center
The Owens Corning warranty covers materials; this one covers our work. Both documents come with your estimate.
*Owens Corning System Protection Limited Warranty on a complete Owens Corning roof system installed by an Owens Corning Preferred Contractor and registered within 60 days. Limited lifetime material coverage with a 50-year non-prorated (TRU PROtection®) period on single-family detached homes; 20 years on other structures. Material only; workmanship is covered by our 10-year warranty. See the warranty for terms.Limited warranty. The System Protection warranty requires a qualifying Owens Corning roofing system and is subject to Owens Corning's complete terms, conditions, and limitations. Owens Corning does not cover workmanship. Owens Corning Roofing Preferred Contractors are independent contractors and are neither affiliates nor agents of Owens Corning Roofing and Asphalt, LLC, or its affiliated companies.
What “a complete Owens Corning system” means
Owens Corning's System Protection Limited Warranty only applies when the whole roof is built from matching Owens Corning parts.
What you get: limited lifetime material coverage, with up to 50 years of non-prorated (TRU PROtection®) coverage on a single-family detached home, or 20 years on other structures. It covers materials only. It does not cover workmanship, which is what our 10-year Guthix workmanship warranty is for, and it does not apply to repairs, partial or low-slope roofs, siding, or gutters.
- 1Owens Corning shingles and Owens Corning hip & ridge shingles.
- 2At least two Owens Corning accessories: VentSure® ventilation, synthetic underlayment, starter shingles, ice & water barrier. We install three as standard (ProArmor® underlayment, Starter Strip Plus, WeatherLock® ice & water).
- 3The roof covers the entire structure and sits over a ventilated deck. Partial roofs and roofs over unvented decks don't qualify.
- 4Installed by a contractor in Owens Corning's Preferred program and registered within 60 days. Guthix is a Preferred Contractor, and we handle the registration.
The attic is half of a roof replacement
A roof only lasts as long as the attic under it lets it. Too little intake at the soffits or a hot, poorly insulated attic cooks shingles from below in summer and feeds ice dams in winter. Owens Corning also requires a ventilated deck for its system warranty, so we check intake and exhaust on every replacement and quote what it takes to balance them.
If the inspection shows thin or uneven insulation, we can add blown-in attic insulation while we're there, priced as its own line. Read more about attic insulation & ventilation and how to stop ice dams.
Doing the roof and siding or gutters together
The roof edge, gutters and walls are one water path. One contractor laps the drip edge, gutter and wall flashing in the right order, on one schedule and one itemized quote.
The Owens Corning system warranty covers the roof only; siding and gutters carry their own written terms. Not sure it's time yet? Take the free 60-second roof checkup or read should I replace my 20-year-old roof?
Roof replacement across Downriver
Based in Wyandotte, we replace roofs across Downriver, including Riverview, Grosse Ile, Woodhaven and Brownstown, and the rest of Wayne, Oakland, Macomb, Washtenaw & Monroe Counties. Local pricing, housing stock and permits for your city:
Your questions, answered straight
Most homes are done in one to three days, depending on size, pitch, and complexity. We give you a realistic timeline up front and keep you posted if Michigan weather forces an adjustment.
We strongly recommend a full tear-off to bare decking. It lets us inspect for rot and soft spots, fix hidden problems before they're sealed under a new roof, and give you the longest-lasting result. Owens Corning's system warranty also requires the roof to go over a ventilated deck covering the whole structure. We'll always explain your options honestly.
We install Owens Corning Duration® architectural asphalt shingles, a Michigan favorite for their 25–30 year lifespan, strong value, and resistance to wind and freeze-thaw. For extra protection, we offer the impact-resistant Duration® FLEX upgrade, which stands up better to hail and high winds; some insurers discount impact-resistant roofs, so ask yours. We'll help you decide which fits your home and budget.
On a complete Owens Corning roof replacement we register the Owens Corning System Protection Limited Warranty (up to 50 years of non-prorated material coverage on single-family homes), and our own 10-year Guthix workmanship warranty covers the installation. Both in writing before you sign. We install the shingles with Owens Corning Starter Strip Plus, ProEdge® hip & ridge, WeatherLock® ice & water barrier, and ProArmor® underlayment, so the whole system qualifies. The Owens Corning warranty covers the materials; our workmanship warranty covers the installation.
Everything: tear-off and disposal, materials, labor, flashing, permits, cleanup, and warranty terms, all itemized. No vague lump sums, no surprise add-ons mid-project. Two things can't be priced from the ground: rotted decking, billed per board or sheet at a rate written into your quote, and extra vents for an under-ventilated attic. You see both before any work on them starts.
Yes, within limits. Asphalt shingles need some warmth and sun to seal down fully, so in cold months we schedule around the forecast rather than force a job into bad weather. Late-fall installs are common in Michigan, and we'll tell you honestly if waiting for a better window makes more sense for your roof.
Yes. If storm damage is involved, we'll inspect and document it clearly and can meet your adjuster on-site to make sure the full scope of legitimate damage is captured.
Every price comes off my cost sheet, every install runs under my license and warranty, and I'm the one who answers for it — before and after the deposit.
Greg Tittle
Owner, Guthix Roofing · Wyandotte, MI
- Michigan Licensed Residential Builder #262600716
- Insured & BBB Accredited
- Owens Corning Preferred Contractor
Ready for a roof you won't have to think about?
Book a free, no-obligation inspection. A licensed pro on your roof, photos of everything we find, and a written, itemized quote backed by two warranties.