What Is A Complete Roof Replacement? 5 Things to Know Before You Get One

Allstate Exteriors • July 24, 2023

If you received the news that you need a roof replacement due to old age or severe damage, you’d likely have several questions about the process. Replacing a roof can be a huge and costly undertaking that involves a lot of decision-making. So, learning as much as possible about the process and best practices is important before starting it. 

Here are 5 key things to know about getting a complete roof replacement.

1. The Materials That Make Up the Roofing System

There’s more to a roof than just the top covering you see from the street. Your roof comprises various roofing materials and components that make up a complete roof system. These include: 

  • Roof flashing
  • Roof decking
  • Pipe boots
  • Shingles
  • Drip ridge
  • Roof vents
  • Ice and water shield
  • Underlayment
  • Ridge capping

While you’re allowed to have two layers of shingles on your roof, removing the old layer of shingles and replacing the other components is usually a better idea. This allows any problem areas to be fixed before they’re covered up again. However, it’s essential to understand that not all components must be replaced. For instance, you don’t have to replace the roof decking if it’s in good condition. If it has minor damage, partial replacement may be necessary. To get the best material warranty available when replacing your roof system, use quality materials.

2. What the Roof Replacement Process Looks Like

The roof replacement process starts with delivering roofing materials to your home. Then, the roofing contractor will ensure that vehicles, furniture, and other items are moved out of the driveway or an area where they can be damaged. Once everything is cleared, the roofers will begin protecting your property.  The crew will then start tearing off the old roofing materials. After the tear-off, the contractor will inspect what’s roof decking and framing. Depending on their condition, they may perform minor repairs to restore the new roof’s structural integrity. 


Next, the roofer will put underlayment over the decking to prevent water infiltration. The metal drip edge is then at the edge of the roof to help protect underlying components from water damage. The new roofing material will be installed starting from the eaves and gradually moving toward the peak. The roofer will install flashing to leak-proof the chimney and areas around skylights, valleys, and vents. They will also install gable or ridge vents for proper attic ventilation. 


With the new roof adequately installed, the contractor will clean up the mess and inspect your new roof to ensure the workmanship meets your expectations.

3. How Long Does a Roof Replacement Takes

The roof size largely determines the timeline of a roof replacement project. Roofs with more square footage and various heights and angles will require more time to replace. The condition of your roof will also determine the timeline. For instance, a roof with extensive structural damage underneath the roof covering will require additional repair work to restore its integrity and prepare it for new materials. The more work is needed, the longer the project can take.


Other factors that determine how long a roof replacement takes include:

  • Weather conditions
  • Size of the crew
  • Type of roofing material
  • Architectural details of your homes
  • The ease with which the roofers can access your roof

While most roof replacements are completed in one to two days, ask your contractor for a timeline before scheduling your roofing project.

4. Focus on Quality

Roof replacement is one of the most expensive home improvement projects. Yes, you may not be financially prepared for such a costly project, but when it’s time to replace your roof, you don’t want any delays because of finances. 


Also, it may be tempting to go with the cheapest roofing materials and work with a contractor with the lowest prices. Remember, though, you get what you pay for. When you choose cheap materials and labor, it will show in the finished quality of your roof, which may prove to be more expensive in the long with constant repairs and, eventually, a premature roof replacement. Invest in quality when replacing your roof to ensure excellent, long-lasting results.

5. How Much a New Roof Costs

When calculating the cost of your new roof, your contractor will consider several factors, including:

  • The size, style, and complexity of your roof
  • Old roof removal
  • Type and quality of material you choose
  • The other system materials and components
  • Your roof’s accessibility
  • The condition of your roof decking
  • Labor costs
  • Operating costs
  • Dump fees
  • Additional features such as vents, skylights, and chimneys.

A roof replacement is a considerable investment, so you want to make sure the job is done right the first time. Ask the roofing for a roof replacement estimate so you can have all the information you need about the cost of your new roof. A reasonable roof estimate should be detailed with a line item list of what will be done during the replacement.

Reliable Roof Replacement for Your Home

Trust Allstate Exteriors & Restoration for all your roofing services in Central Ohio and Cape Coral, FL. Our technicians will help you navigate the ins and outs of the roof replacement process to ensure you get the best roof for your needs. We use only the best roofing materials and install roofs with precision, delivering the curb appeal and performance you deserve. Contact us today for a free estimate.

Westerville Homeowners: Keeping Your Roof in Top Shape

April 8, 2026
Your home is more than just a place to stash your stuff; it’s the place you’ve poured your life into. Living here in Westerville, we’re lucky to have such a great mix of tight-knit neighborhoods and quick access to everything we need. Whether you’re grabbing coffee near Uptown or taking the kids to spend an afternoon at Inniswood, you know this area is special. But let’s be honest: Ohio weather isn't always kind to our houses. Between the brutal freeze-thaw cycles in the winter and that sticky humidity we get living near the reservoir, your roof takes a beating. It’s the first line of defense for everything inside your walls.  If you’ve been spotting a few stray shingles in the yard or just have a nagging feeling that your roof is getting a bit long in the tooth, you’re in the right place. As a local roofing company, we’ve been up on enough Westerville rooftops to know exactly what makes them tick, and what tends to go wrong. Why "Local" Actually Matters There’s a big difference between a national franchise and a crew that actually lives and works here. We aren’t just reading a manual; we’ve dealt with the same storms you have. The Ohio Reality Check We don’t have mild winters here. We have "ice dam" winters. When your attic isn't venting heat properly, the snow on your roof melts, runs down to the eaves, and freezes again. That cycle can force water right under your shingles and into your insulation. If you’ve ever seen water spots on your ceiling after a winter thaw, that’s usually the culprit. On the flip side, our summers can be relentless. All that heat and humidity can lead to moss or algae growth, especially on the north side of the house where the sun doesn't hit as much. If you let that stuff sit, it eventually eats away at the grit on your shingles. Matching the Neighborhood We’ve worked on everything from the historic homes with unique angles to the newer builds in the suburbs. Every home needs a slightly different strategy. A quick patch might be fine for one house, but a total re-roofing might be the smarter, cheaper play for another. We’re not here to upsell you; we’re here to tell you what your specific roof needs to last another 20 years.

Comprehensive Roofing Services in Ohio: Expert Roof Repair, Replacement, and Installation Solutions

April 1, 2026
Comprehensive Ohio roofing guide covering repair, replacement, and installation tips for homes and businesses. Protect your roof year-round.

Commercial Roofing Solutions for Beavercreek Businesses

March 25, 2026
 Running a business in Beavercreek, Ohio comes with its unique set of challenges and responsibilities. One of the most critical investments for any commercial property is the roof. A well-designed, high-quality roof protects your building, employees, and assets while enhancing energy efficiency and reducing long-term maintenance costs. Understanding the best options for your property is crucial, and Commercial Roofing Solutions for Beavercreek Businesses from Allstate Exteriors are designed to meet the diverse needs of local businesses throughout Greene County. From office buildings in central Beavercreek to retail centers near Wright-Patterson Air Force Base, commercial roofing requires specialized knowledge. Allstate Exteriors combines decades of experience, local expertise, and a commitment to quality to ensure that your business receives roofing solutions that stand the test of time. Why Commercial Roofing Matters for Beavercreek Businesses Commercial roofs face different pressures than residential roofs. They cover larger areas, often have more complex structures, and are exposed to frequent foot traffic during maintenance. Weather in Beavercreek adds another layer of complexity. Summer storms bring heavy rain and high humidity, while winter conditions include snow, ice, and temperature fluctuations. Over time, these elements can degrade roofing materials if not properly maintained or installed. Investing in a professional roofing system reduces the risk of leaks, structural damage, and costly emergency repairs. It also protects your employees, inventory, and customers from exposure to the elements. A well-planned roof contributes to the operational efficiency of your business and can even improve energy performance, which is increasingly important for modern commercial properties.

Seasonal Roof Maintenance Checklist for Bellbrooke Homes

March 18, 2026
Protect your Bellbrooke, OH home year-round with Allstate Exteriors’ seasonal roof maintenance checklist. Learn expert tips, local insights, and proven strategies to extend the life of your roof and prevent costly damage.

Humid Summers & Cold Winters: Choosing the Right Roof for Baltimore, OH

March 11, 2026
Discover how Allstate Exteriors helps homeowners in Baltimore, OH choose the right roof for humid summers and cold winters. Learn about roofing materials, local climate challenges, and expert solutions designed for long-term performance.

Historic Roof Care: Preserving Ashville’s Older Homes

March 5, 2026
Ashville, Ohio is a community rich with history, character, and homes that tell the story of generations. For many homeowners throughout Ashville and neighboring communities such as South Bloomfield, Tarlton, and Canal Winchester, preserving the charm and structural integrity of these older homes is a priority. When it comes to protecting these architectural treasures, Historic Roof Care: Preserving Ashville’s Older Homes is not just a service, it is a vital investment in maintaining the legacy and value of your property. At Allstate Exteriors , we specialize in delivering expert historic roof care tailored to the unique needs of Ashville’s older homes and historic districts. In the heart of Ohio, older homes were often built with materials and methods that differ significantly from modern constructions. These roofs carry years of history and have faced decades of weather, from icy winters to humid summers. Understanding how to preserve these roofs requires more than a standard roofing service. It demands a specialized approach rooted in respect for historical craftsmanship and knowledge of local conditions in Ashville . In this post, we’ll explore practical guidance, local insights, and the reasons why trusted historic roof care from Allstate Exteriors makes all the difference for homeowners committed to preserving Ashville’s architectural heritage. Why Historic Roof Care Matters in Ashville Many homeowners in Ashville are drawn to older homes because of their distinct charm, unique character, and timeless appeal. However, historic roofs often present challenges that modern roofing systems do not. Traditional materials such as slate, cedar shake, or metal roofing installed decades ago have specific maintenance requirements. The purpose of historic roof care in Ashville is to extend the life of these roofs while maintaining their original appearance and structural integrity. Historic roofs were built in an era before modern synthetic underlayments, advanced flashing systems, and today’s wind-resistant technologies. Over time, exposure to Ashville’s seasonal climate variations can cause traditional shingles to crack, valleys to weaken, and flashing to corrode. Homeowners who postpone preservation work risk accelerated deterioration, water infiltration, and costly repairs in the future. By investing in historic roof preservation , you are protecting the original craftsmanship that makes your home unique while also enhancing long-term durability and performance. At Allstate Exteriors , we take a customized approach to historic roof care that accounts for both the architectural significance of your home and the environmental factors specific to Ashville and the surrounding areas. With decades of combined experience working with historic properties, our team is well-equipped to assess, protect, and preserve roofs that others might overlook. Whether it is a slate roof dating back nearly a century or a cedar shake roof in need of rehabilitation, we provide solutions that honor Ashville’s past while preparing your roof for the future. Understanding the Unique Challenges of Historic Roofs in Ashville Historic roofs are more than just a collection of shingles or tiles, they are an integral part of a home’s architectural identity. Because of this, the process of historic roof care in Ashville begins with understanding the distinct issues these roofs face over time. Material-Specific Challenges Slate, for example, is a beautiful, long-lasting material that can endure for over a century, but individual slates can become brittle and break. Cedar shake roofs offer natural beauty and insulation qualities, but they are susceptible to rot and insect damage if not properly maintained. Metal roofs, often found on historic barns and outbuildings in Ashville, can suffer from corrosion if protective coatings deteriorate. Architectural Complexity Many historic homes in Ashville feature steep slopes, intricate gables, and architectural bezels that create aesthetic appeal but also complicate maintenance and repairs. Without careful inspection and a preservation strategy, water can find its way into vulnerable areas such as valleys, flashing seams, and chimneys. Climate Impact Local weather patterns also play a role. Ashville’s humid summers can cause wood materials to expand, while Ohio’s cold winters bring freeze-thaw cycles that stress roofing components. Heavy rains, spring storms, and strong winds can loosen historically significant roofing elements. Allstate Exteriors’ historic roof care services include proactive measures that anticipate these challenges and address them with precision and care.