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Windows or Siding: Which Should You Replace First?

Home renovations can be complicated, but they’re an effective way to improve your home and increase the value of your property. If you plan on upgrading your home’s exterior, for instance, siding and window replacement can dramatically boost curb appeal.

Windows or Siding Replacement

If you’re wondering which of the two should be updated first, Window World of Boston — one of the most trusted window installation companies in the area — suggests replacing your windows before your siding. Read on to find out why.

Why You Should Replace Windows First

According to experts, it’s best to install new windows before replacing your siding, especially if you’re doing both projects simultaneously. This is to allow the contractor to set the windows in place and finish all the capping before the new siding is installed.

Capping is an aluminum protective covering placed over the window frame. It protects your home from leaks and water damage by sealing the gaps between your wall and windows. The capping can get damaged during the removal of your old siding, so if you choose to replace your siding first, you’ll have to recap your existing windows and then cap your new windows when you finally install them — doubling your expense.

Capping and recapping can add significant costs to your project, depending on the number and size of your windows. If you’re hiring the same contractor to install your windows and siding and you still prefer to replace your siding first, you can ask about free window capping when they install your new windows.

Another important consideration is the moisture barrier surrounding your windows. Window installation contractors will have to remove parts of the adjacent siding in order to install this feature properly. However, this can be challenging and risky since your siding may be too old and fragile and could actually break when taken out.

When You May Replace Siding First

Although contractors advise homeowners to have their windows replaced first, there are situations wherein you may prioritize siding replacement. Experts usually suggest this route when the siding requires urgent replacement and the windows are still fully functional. 

Is It Necessary to Remove the Siding to Replace the Windows?

There are instances where this isn’t required. According to window manufacturers, you don’t need to remove your siding if you’re going to use replacement windows and your framing and moisture barrier are still in good condition.

When to Replace Both Siding and Windows

Contractors typically recommend replacing both windows and siding at the same time because this allows homeowners to save time and money. It also prevents possible damage to either siding or windows. Replacing siding and windows at the same time can be costly, but it will enable your contractor to carry out each installation more safely.

Signs That You Need to Replace Your Siding and Windows

There are various factors to consider before deciding whether to replace or upgrade your siding and windows. Although these replacements can help improve your property, it pays to know when they’re truly necessary. Otherwise, you might end up spending money on a siding or window replacement that’s not really needed. 

To help you determine if it’s time to replace your siding and windows, here are some signs that you should look out for:


  • Bubbling  This can happen when your siding is exposed to excessive heat or moisture. Fortunately, you can easily replace the affected parts by calling a contractor.

  • Hail damage  Depending on their size and impact, hailstones can damage protective barriers like your siding. Chipping, denting and cracking on the siding are signs that it may have been damaged. 

  • Mold  Mold can quickly spread and compromise your siding. Since this can also harm your health, make sure mold growth is addressed immediately.


  • Cracks  A warped and broken window frame is not only unattractive, it can also lead to problems with your insulation, siding and heating and cooling system.

  • Drafts — Drafty windows can affect your heating and cooling system’s efficiency and, ultimately, your energy bills. Window manufacturers suggest keeping an ear out for rattling sounds and an eye out for gaps between your windows and wall.

  • Noise  If your windows can’t keep outside noise out of your home, they may not be sealed correctly, or they may lack sound insulation. If you want to upgrade your windows to enjoy peace and quiet inside your home, you should look for sound-insulating replacement windows.

Additional Tips

To determine if you should replace both your siding and windows, have a look at your utility bills from the previous months. If you see a significant hike in your bills, this could be an indication that your siding and/or windows are no longer performing well. Keep in mind that both siding and windows play crucial roles in maintaining an energy-efficient home. You can consult a professional and request an energy audit to find out more about your home’s energy efficiency. Make sure your siding and windows are also inspected to determine if they’re contributing to higher energy bills.

Don’t forget to hire a reputable company to get the job done right. Window and siding replacement jobs are complex undertakings that require the expertise of professionals. With their skills and knowledge, experts can ensure the best results for your project and help you avoid the costly errors of a DIY job. Remember that the success of your project depends on the quality of work provided by your contractor. That said, take the time to verify a contractor’s credentials and make sure they’re experienced in window and siding replacement.

Call Us Today!

Since 2002, Window World of Boston has provided homeowners in Woburn, Pembroke and Shrewsbury, MA, with high-quality solutions for various home improvement needs. We’re a locally-owned and -operated company that has always been committed to delivering complete customer satisfaction. We ensure superior workmanship and use only the most trusted products available today. When you need to replace your windows and siding, you can be confident that we have you covered. 

Call us at (781) 262-3925 (Woburn), (781) 343-7129 (Pembroke) or (508) 845-6676 (Shrewsbury). You may also fill out our contact form to request a free quote.

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Window World of Boston has an A+ BBB Rating and offers industry-leading solutions for replacement windows, doors, siding and more. We follow through every job from start to completion while our friendly, knowledgeable staff is there to answer your questions and provide any level of customer support you need. Window World is committed to providing the highest customer satisfaction.
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