Are your old windows causing drafts and driving up your energy bills? Installing window inserts is a smart, cost-effective solution that can improve your home’s energy efficiency and aesthetic appeal. Unlike full-frame replacements, window inserts fit neatly into your existing window frames, making the installation process simpler and less invasive. This guide will walk you through the step-by-step process of installing window inserts, ensuring a secure and proper fit.

Safety Tips

  • Read the entire guide before starting.
  • Have someone to help you.
  • Exercise caution while handling tools and materials, especially when working on a ladder.
  • Wear safety glasses and gloves to protect yourself from debris and sharp edges.

Measuring for Window Inserts

Accurate measurements are crucial for a proper fit. Here’s how to measure your window openings:

  1. Measure Width: Measure the width of the window from one jamb to the opposite jamb at three spots: top, middle, and bottom. Choose the shortest measurement, subtract 1/8-inch, and write this down.
  2. Measure Height: Measure the height from the bottom (sill) to the top (head) at the left, middle, and right. Choose the shortest measurement, subtract 1/8-inch, and note this. Repeat for other windows.
  3. Check Window Square: Measure the window’s diagonals from top-left to bottom-right and top-right to bottom-left. If the two measurements are within 1/4-inch, the window is square enough to proceed. If not, call a professional to repair the window’s underlying structure.

Preparation

  1. Clean the Window Frame: Remove dirt and debris from the window frame with a cleaning brush.
  2. Remove Blinds and Obstructions: Remove window rods, blinds, screens, and storm windows with a screwdriver or cordless drill.

Removing Existing Window Components (if applicable)

  1. Remove Old Windows: Pry off the vertical window stop molding on the window jambs, cut any sash cords, and remove the parting bead. Remove the window sashes.
  2. Remove Storm Windows: Use a razor blade to break the paint seal around the storm window. Remove the screws holding the storm window in place using a screwdriver. Lift the storm window out of the frame carefully.

Step-by-Step Installation Guide

1. Measure Window

Measure the width and height of the window opening as described in the measuring section. Ensure accuracy to avoid fitting issues.

2. Check Window Square

Measure the window’s diagonals to ensure the window opening is square. If not, repairs may be necessary before proceeding.

3. Check New Windows

Ensure the new insert replacement windows are the right measurements and in good condition. Match each new window to its corresponding opening.

4. Remove Blinds and Obstructions

Remove any blinds, curtains, or obstructions that could interfere with the installation process.

5. Remove Window

Pry off the vertical window stop molding on the window jambs. Remove the window sashes and any other components that prevent the window from being pulled forward into the house.

6. Add Insulation

Fill any empty spaces around the window frame with fiberglass insulation or spray foam. Be careful not to overfill with spray foam, as it can expand significantly. After the foam has dried, trim any excess with a hand saw.

7. Shim Window

Place the insert replacement window in the window opening to check for general spacing. There should be a slight space between the window and the window frame around the entire perimeter. Add three shims on the bottom and use a bubble level to ensure the window is plumb and level.

8. Caulk Around Window

Remove the window. Run two lines of caulk along the bottom of the window and at the bottom corners. Lift the window back into the window frame and reposition the shims if needed.

9. Loosely Fasten Window

Fasten the window to the jambs by driving screws through the holes in the window. Start at the bottom and work upwards. Shim at each screw. Leave the screws loose initially.

Lower and open the window sashes to check for movement. Check for plumb and level with the bubble level. If satisfied with the fit, tighten the screws. Be careful not to bow out the window.

10. Insulate Around Window

Push insulation into the cracks between the window and the frame. Keep the insulation loose to avoid bowing the window.

11. Add Backer Rod

From the house exterior, push foam backer rod over the insulation. Use a dull object, like an old putty knife, to avoid cutting the backer rod.

12. Caulk Over Backer Rod

With the exterior caulk in the caulking gun, apply caulk over the top of the backer rod to seal the window.

13. Install Drip Cap

On the house exterior, place a drip cap across the full width of the window at the top. Apply sealant to secure it in place.

14. Install Flashing

Apply a strip of flashing across the drip cap leg, sealing it in place to prevent water infiltration.

15. Cut Shims

Cut off the protruding ends of the shims to ensure a clean, finished look.

Expert Installation vs. DIY

– Pros and Cons of Hiring a Professional

Hiring a professional for your window installation can save time and ensure a high-quality result. Professionals have the experience and tools to handle any issues that may arise. However, professional installation can be more expensive than a DIY approach.

– Tips for a Successful DIY Installation

If you choose to install the windows yourself, follow the step-by-step guide carefully. Take your time with each step to ensure a good fit and proper sealing. Use high-quality materials and tools to achieve the best results.

Common Mistakes to Avoid

Avoid these common mistakes to ensure a successful window installation. These tips will help you achieve the best results.

  • Importance of Accurate Measurements: Always measure accurately. An ill-fitting window can cause drafts, leaks, and operational issues.
  • Proper Sealing Techniques: Make sure to apply caulk properly around the window. Gaps can lead to drafts and water damage. Use enough caulk to create a tight seal.
  • Taking Your Time to Ensure a Good Fit: Don’t rush the installation process. Each step is important for a proper fit and long-lasting results. Carefully follow the instructions and make adjustments as needed.

FAQs

What are window inserts?

Window inserts are custom-fit windows that are installed within the existing window frame. They improve energy efficiency and can be installed without removing the entire window frame.

How long does it take to install window inserts?

It usually takes about 2-4 hours per window. This includes the removal of the old window and the installation of the new one.

Can I install window inserts myself?

Yes, with the right tools and instructions, you can do it yourself. However, professional installation ensures the best results and can save time. Read our guide on window replacement here.

What tools do I need to install window inserts?

You will need a measuring tape, level, screwdriver, hammer, pry bar, utility knife, sharp utility knife, putty knife, cordless drill, caulk gun, razor, and a brush for cleaning.

How do window inserts improve energy efficiency?

Window inserts improve energy efficiency by providing an additional layer of insulation, reducing drafts, and preventing heat transfer.

Conclusion

Installing window inserts is a practical and efficient way to enhance your home’s energy efficiency and overall appearance without the need for extensive renovations. By fitting neatly into your existing window frames, window inserts provide excellent insulation, reduce drafts, and can be installed with minimal disruption. With the right tools and careful attention to detail, you can successfully install window inserts yourself, preserving the charm of your original windows while reaping the benefits of modern energy-efficient solutions.

For more complex installations or if you encounter issues, consider contacting a local window contractor. For professional help, visit Window Depot Columbus East for expert window installation services.