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How does the window replacement process work?
If you're considering an update to your home's windows, you're probably wondering how a window replacement project even works. What are the steps? How much will it cost? What will you need to do, exactly? Don't worry, this guide will explain all the major milestones of the window replacement process so you can tackle this project with confidence.
How do you know when it's time to replace your windows?
What are the steps in the window replacement process?
There are eight major steps in the window replacement process:
1. Develop a vision
The better you understand what you want, the better direction you’ll be able to give your contractor, and the better they’ll be able to deliver an end result that meets your expectations. So, knowing what you want is important, but it can also be a challenge to figure out.
Not to worry, we’ve got a process that will help you start developing a vision. Check out how to choose the right windows for your project. And remember, you don’t have to have every detail figured out. If you can work out your priorities, your contractor will be able to help you land on the exact right products.
Want to take it slow? You can also find lots of beautiful inspiration in the Projects section of our blog.
2. Research contractors
Window and door installation is a specialty within the contracting field, so ideally, you’d find a contractor who focuses on this area. In addition to the right experience, you’re also looking for someone who makes you feel comfortable and heard. The best way to find such a contractor is by meeting and talking with a few that you believe might be the right fit.
Here are a few ways to start identifying good candidates:
- Ask friends, family, and neighbors who have been through the process for a recommendation.
- Check out ratings and reviews from the Better Business Bureau, Google, and Angi (formerly Angie’s List).
- Find an Andersen Certified Contractor in your area. These contractors not only have window installation experience, but they also know our products, and they meet certain requirements that help protect homeowners, such as carrying insurance.
Get all our tips for finding the best contractor for your project.
3. Meet with contractors
Once you find a few potential contractors, your next step is to set up meetings with them at your home. The first meeting is an opportunity for you to explain your needs and interview the contractor. Here are some things you’ll want to do during this first meeting:
- Show them your windows and explain the problem or problems.
- Explain your vision for your new windows.
- Tell them what your budget is for the project.
- Ask them about their product recommendations. It will be easier for them to make a good recommendation if you share your vision and your budget.
- Ask them about their experience and qualifications.
To make these meetings easier, we have a list of the top questions you should ask your contractor.
4. Evaluate quotes
After you’ve met with a few contractors and discussed the context of the project, the next step is for them to send you written quotes. A quality quote will include a few key elements:
- A description of the work that’s specific to your home and addresses the work that will be needed to remove your old windows and install new ones.
- Details about the products, including the manufacturer, window types, number of windows, sizes, and other details discussed.
- Other project costs, including costs for labor, installation, permits, disposal, and more.
Comparing quotes from different contractors and product warranties from different manufacturers can help you evaluate who is providing the ideal products and services within your budget.
5. Sign a contract
Once you’ve decided on a contractor and agreed on the right products for your home, you’ll sign a contract. Here are a few key pieces of information that should be included in the contract:
- A clearly defined scope of work, including all of the details that will be required for your project.
- The total price for the project, or details about how the total price will be calculated.
- The terms of payment, including when payments are due.
- A provision stating that changes to the scope, price, or schedule must be documented in writing and agreed to by both parties.
Sometimes, the contract may also include an anticipated project schedule and explain how delays or changes will be handled if they should occur.
6. Contractor will take technical measurements
Before a contractor can order your windows, they need to take precise measurements. This will allow them to order windows in the right size. It’s likely your contractor took measurements during their initial visit to your home. Those measurements were needed to create an accurate quote. The measurements needed to order windows will be more technical. Here are a few things to be aware of:
- Depending on the size of the company you contract with, the person who comes to take technical measurements might not be the same person who came to your home for the initial meeting. It can be a good idea to ask who will be in your home and when during the first meeting — here’s a list of more questions to ask in that meeting.
- The trim (or casing) around your windows might need to be removed to take accurate measurements. Often, the trim is replaced when windows are installed, but it can sometimes be preserved when you get insert replacement windows.
7. Window installation day
It’s the day you’ve been anticipating since the start. To make the process as seamless as possible, there are a few steps you’ll want to take to prepare your home and your family.
- Contact your contractor a few days in advance to confirm details.
- Create a plan for kids and pets.
- Get all the details on how to prepare for window replacement day.
8. Final walk-through with contractor
Once the installation is complete, your contractor should take you on a walk-through. This is when they’ll show you the completed work. It’s a chance for them to explain the basics of how the windows operate and demonstrate things like how the tilt-wash functions on double-hung windows work. It’s also a great time to ask about care and maintenance.
Although projects vary and unforeseen issues can arise, these are the major steps you should expect in any window replacement project.
How can you buy replacement windows?
We support three main ways to buy replacement windows, so you can pick the path that fits your time, budget, and comfort level. Here’s what to know:
- Pro-led project: In a pro-led project, you hire an independent contractor and work together on your window selections. Your contractor then purchases the windows through a building supplies dealer or a retailer such as The Home Depot. In other words, you get expert guidance from pros who purchase and install windows every day. Andersen Certified Contractors provide this type of replacement service, so you can work with a pro who not only knows our products well, but has been vetted, insured, and licensed.
- Full-service replacement experience: With a full-service replacement experience, one company manages every step from beginning to end, including purchasing. You get project management, help with selecting and specifying products, and installation services through one provider. Renewal by Andersen replacement services or The Home Depot Installation Services (HDIS) can deliver this type of experience, guiding you from your first conversation to your final installed window.
- DIY project: For a DIY project, you are in charge. You choose your windows, purchase them yourself, and install them on your own. You are also responsible for coordinating all details related to permitting.
Each of these options will lead you to new, beautiful windows. The right choice depends on how involved you want to be, so start there and the rest of your decisions will fall into place.
How does the window replacement process differ between service models?
Service modelPro-led projects are a great option for homeowners who want a professional to do the work. The benefits include guidance throughout the entire process and guarantees like labor warranties. The drawbacks include less control over timing, as you’re one customer among many, and a higher price than a DIY project. | Product providerYour contractor buys windows through a dealer like The Home Depot or a building supplies dealer. | Measurement responsibilityYour contractor will measure all the windows being replaced and use those measurements to order | Installation responsibilityYour contractor, such as a pro in the Andersen Certified Contractor program, will make all the installations. | Primary point of contactIf the company is small, your contractor will likely be your main contact during the process. However, in a larger company, there may be multiple points of contact, including different people involved at different project stages. | Warranty structureLabor warranties are standard in the trades. Ask your contractor what they offer during your initial meeting. Andersen Certified Contractors offer a two-year installation warranty. The product warranty will come from the manufacturer. |
Service modelFull-service replacement experience is the best option for people who want minimal involvement in the project. The benefits include little coordination and assistance at every step. The drawback is that this level of service is typically the most expensive. | Product providerThe replacement company or service provider will purchase the products for you. In the case of Renewal by Andersen, they will custom-make your products to size and all other specifications at their manufacturing facility. | Measurement responsibilityThe replacement company or service provider will come to your home to take all the measurements needed to order your windows. | Installation responsibilityThe replacement company is responsible for all aspects of installation. When this type of service is being provided, you should expect the process to be highly professional right down to the final cleanup. | Primary point of contactA single point of contact is one of the advantages of a full-service replacement company like Renewal by Andersen. You will be in contact with them from start to finish. | Warranty structureWith a replacement company, like Renewal by Andersen, where they make the product and install it, both your product and installation warranties are through them. With a full-service provider, they’ll provide the labor warranty, and you’ll manage your product warranty through the manufacturer. |
Service modelDIY projects might be right for homeowners who are experienced in home improvement projects. The benefit is cost savings and the highest degree of control over the process. The drawback is that you are taking on all the responsibility yourself. | Product providerYou will buy the windows from a retailer, such as The Home Depot. Buying from a building supplier may also be an option, but some only sell to pros. | Measurement responsibilityYou will need to measure your windows. We can help you get started with measuring but you want to be confident in your ability to take steps like this if you choose to DIY. | Installation responsibilityYou are the installer. This also means you take responsibility for getting any necessary permits, gathering the needed installation materials, disposing of your old windows, and any other details required. | Primary point of contactThere’s less coordination with outside vendors since you’re taking on the work, but you will be responsible for coordinating with the retailer for the purchase of your windows and details of their delivery. | Warranty structureThere’s no labor warranty since you’re providing the labor and will be liable for correcting any mistakes. Product warranties are available through the manufacturer. |
Whichever path you choose, ask each company the same questions: Who measures? Who installs? Who do I call if something goes wrong? And what does the warranty cover, in writing? The best process is the one that matches your desired level of involvement and your budget. Decide how much time and money you're comfortable with investing in the project, then pick the service model that lets you focus on enjoying your new windows.
What should you consider when choosing replacement windows?
Before the window replacement process can truly begin, you need to choose your new windows. While you will need to consider details such as the material of your windows, the glass options, and energy performance, there are other crucial factors to review in a window replacement situation.
Depending on the condition of your existing window, the type of window being replaced, and your renovation goals, there are several installation methods that may be appropriate. Understanding these options can help you choose an approach that balances performance, appearance, project scope, and budget.
- Insert replacement: Fits a new window into the existing frame and is typically the least invasive option.
- Full-frame replacement: Removes the entire window and frame, making it a better choice when addressing issues such as drafts, leaks, rot, or other structural concerns.
- Other considerations: Frame condition, existing window style, desired design changes, and overall project budget can all influence the best installation method.
Your contractor can help evaluate your existing windows and recommend the installation approach that best meets your home's needs. Taking the time to understand your options can help ensure lasting performance and value from your investment.
Want to dig deeper into this topic? Check out our guide explaining the difference between the types of replacement windows.
How much do replacement windows cost?
The total project cost depends on the windows selected, the labor, and installation costs. Here’s how to start thinking about replacement window costs:
- Windows: The product itself is a major cost driver. If you’re replacing all the windows in your home, it’s going to be more expensive than a phased approach to replacement where you replace over time. Then, there’s the cost of each individual unit, which will depend on the size, material, and selections made. Choosing a trusted brand, like Andersen, and then selecting a more accessibly priced product line, like our 100 Series, and avoiding upgrades, can help you maximize your budget.
- Labor and installation: The costs associated with labor and installation will vary greatly depending on the service model selected. Generally, DIY is the least expensive, so long as it’s done correctly and doesn’t need to be fixed later. A full-service experience, like what’s offered through Renewal by Andersen, is the most expensive. Pro-led projects can vary from a full-service type of experience (with the associated price) to something less hands-on and therefore more affordable — it really depends on the contractor you hire.
Learn more about window costs and when you’re ready for pricing specific to your replacement project, we can help you get started by requesting a quote.
What happens after you order replacement windows?
Once the final measurements are confirmed with your contractor and your windows are ordered, you’ll be waiting for them to be made or procured. Here are some ways that commonly happens:
Andersen windows may be available on the shelf at your local The Home Depot store or building supply dealer. This could be the case if they’re standard in size and selections, and that could lead to quicker processing—though it’s not a guarantee.
Most Andersen windows, however, are manufactured according to customer specifications. These custom windows can still be ordered through either The Home Depot or a building supply dealer, but they just won’t be available on the shelf.
In the case of Renewal by Andersen, every window is custom manufactured to fit the existing openings in your home.
Because there are many variables related to both windows and service model, the process of how your product will be made or procured could take any of the routes described above. But your next step as the homeowner will be to coordinate with your installer on a date for the work to be done.
What should you expect during window installation?
During the window installation, contractors will prepare the work area for the job. You can help this along by making sure the area around the window is free of furniture and decor. Removing your curtains or blinds beforehand can also help avoid delays.
You should expect some normal disruption during this process. Be prepared for noise during the removal and fastening of the windows, dust and debris in your home, and brief periods of exposure to outdoor weather when the old window is removed. Prepare for installation day by reviewing this checklist so everything goes as smoothly as possible.
What should you check after your replacement windows are installed?
After your new windows are installed, it’s standard to do a walk-through. Go room by room to review the work as this is the easiest time to catch small issues and get answers on operation, cleaning and maintenance.
Here’s your walk-through checklist:
- Try opening each window to make sure they all operate smoothly, and you understand how to use locks and other hardware. Check the seal around the window and confirm the weatherstrip makes full contact.
- Ask the installer to demonstrate how to properly use any functionality you might not be familiar with, like the tilt-wash opening that comes with our double-hung windows.
- Review the interior and exterior finish work to make sure everything is as you agreed upon
- Confirm that the cleanup is complete, and all old windows and other debris have been removed.
- Ask them to review care and maintenance instructions with you.
- Make sure you have any important labels still attached to the windows, if an inspection is required, and make sure you have important paperwork like product and labor warranties.
