DIY vs. Professional Window Installation: Pros, Cons, and Costs

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So, you need new windows but aren’t sure whether to DIY the job or bring in the pros. We get it—that’s a big decision! That’s why we put together this simple guide to help you take an objective look at both options. Our goal? To help you move forward with confidence, knowing you’re making the best long-term choice for your home. 

Whether you’re replacing a single window or giving your whole home a fresh update, who installs your windows can make a big difference in your home’s energy efficiency and the lifespan of your new windows. Let’s dive in! 

Benefits and Drawbacks to Consider Before Deciding on DIY vs. Professional Window Installation

Cost Considerations

  • DIY Installation – The biggest benefit of DIY installation is the cost savings. You’ll likely need to buy some tools and supplies, but—as you know—the labor will only cost you time. 
  • Professional Window Installation – Hiring a contractor to install your windows will be a bigger financial investment upfront. But the benefits of that investment will pay off for the lifespan of your windows. That’s significant! 

Skill 

  • DIY Installation – Window installation requires precision. A small mistake in measuring or placing your windows can cause costly trouble. Take an objective look at your own experience level before deciding to DIY. However, if you already own the necessary tools and have experience installing windows, DIY installation may be worth considering. You’ll have a sense of accomplishment in completing the project on your own. 
  • Professional Window Installation – To get the best long-term performance out of your new windows, they must be installed properly. Professional installation is recommended to avoid problems that could pop up in the future. When you hire a window contractor, you get high quality work backed by years of experience. That way, your windows last longer and deliver the high performance you deserve. 

Time Requirements

  • DIY Installation – As a DIY enthusiast, it will likely take you much longer to install windows than the pros. You’ll need to measure meticulously, buy the tools and supplies, watch videos to learn how to do the installation properly, and roll up your sleeves to remove your old windows and fit your new ones with accuracy. Plus, you may need to repair hidden rot or deteriorated areas currently under your windows. 
  • Professional Window Installation – Pro installers finish most window replacement projects in one or two days. You’ll get to enjoy your window makeover sooner with less disruption to your daily routine if you choose to have a contractor install your windows. 

Warranty

  • DIY Installation – When you install your windows yourself, the manufacturer won’t honor their warranty. 
  • Professional Window Installation – A big advantage of hiring an experienced window contractor to install your windows is the fact that your warranty will be intact. Plus, most companies offer warranties on their work, safeguarding you even further. Talk about giving you peace of mind on your window investment!

Code Compliance

  • DIY Installation – When homeowners choose to install windows themselves, and building codes are not adhered to, they run the risk of being charged fines.  
  • Professional Window Installation – Window installation includes adhering to local requirements. Window contractors stay up to date on building codes, so you can rest at ease your project will meet compliance standards. 

Safety Considerations

  • DIY Installation – Working with heavy, bulky new windows—often at high locations—can be dangerous. DIY homeowners may face greater safety risks and should proceed with caution. 
  • Professional Window Installation – Window contractors are trained in using tools and take the precautions necessary to keep themselves safe. 

Long-Term Performance

  • DIY Installation – If mistakes are made by a DIY enthusiast, they will show up in poor window performance over the years. This can decrease the lifespan of replacement windows. 
  • Professional Window Installation – Your initial investment in pro window installation pays off with exceptional long-term performance and windows that last—like they were engineered to! 

Risk of Mistakes

  • DIY Installation – Drafts, water leaks, and reduced energy efficiency are some of the risks involved in a DIY window installation. These issues could cause higher long-term costs due to the increase in utility bills and repairs needed for the expensive damage water intrusion causes. 
  • Professional Window Installation – When you hire a pro to install your windows, the risk of mistakes lowers significantly. Your windows are only as good as their installation. At Replacement Windows by Lakeside, with our meticulous installation using top-notch water taping systems and insulated foam, we guarantee water-tight, hassle-free windows. 

Weigh the Drawbacks: DIY vs. Professional Installer

Potential Disadvantages of Professional Window Installation

  • Higher initial investment to cover labor
  • Peak season may mean you can’t schedule your installation immediately

Potential Pitfalls of DIY Window Installation

  • Lower energy efficiency due to gaps around windows 
  • Less indoor comfort
  • Decreased safety and security if windows aren’t installed properly 
  • Higher utility bills
  • Installation is usually more time-consuming than expected
  • Disruption of your daily routine 
  • Need to purchase new tools and window installation supplies

Project Details to Consider Before Choosing DIY vs. Pro Installation

Project Scope

Are you replacing one window or a home full of windows? The greater the number of windows, the greater the risks involved in DIY installation. 

Window Size

The bigger the windows, the heavier they are and the harder they are to handle. Windows installed at greater heights pose greater risks for DIY enthusiasts. 

Cost vs. Time

If you choose to DIY, will the money you save be worth the time you invest and the risk of mistakes? 

Enjoy the Benefits of Professionally and Precisely Installed Windows

While DIY is tempting at first glance, most homeowners choose professional installation. At Replacement Windows by Lakeside, as the exclusive distributor and authorized contractor for Infinity from Marvin in the St. Louis area since 2006, we ensure precise installation of their premium fiberglass windows. 

Don’t miss out on the solutions we offer! Learn more about our replacement window installation services and be on your way to greater energy efficiency, safety, and comfort in your home!

Ready to upgrade your windows but not sure where to start?

Our expert guide walks you through everything you need to know! Discover the best options for energy efficiency, style, and long-term value. Check out the Ultimate Guide to Replacement Windows today!

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