The Cost-Effective Window Draft Stopper

The Draft Blocker is a window draft stopper built to your exact window opening, using 20-gauge clear vinyl secured in a durable aluminum frame to help seal cold air out of drafty windows for a fraction of the cost of replacement storm windows.

Each window draft blocker is made by hand in Colorado and sized in 1/16-inch increments for a custom fit. Because it installs from inside your window opening, there’s no need for exterior work or permanent modifications to your home. When seasons change, you can swap the vinyl panel for a matching screen panel to enjoy fresh airflow during warmer weather. Find more options in our Fall & Winter Screens collection.

An Interior Storm Window Insert Built to Your Opening

The Draft Blocker functions as an interior storm window insert and fits inside your existing window opening to create a second sealed air layer. Unlike exterior storm window inserts, interior window inserts don’t require a contractor, exterior installation, or permanent changes to your home, making them a great option for renters, condos, and historic property owners.

According to the U.S. Department of Energy, heat gain and heat loss through windows account for 25% to 30% of residential heating and cooling energy use, while reducing drafts throughout your home may result in energy savings of 10% to 20% per year. For homeowners looking at interior storm windows, removable vinyl window inserts like the Draft Blocker can also work as window inserts for winter to reduce drafts without permanently changing your existing window. Find the right storm window for your home.

Draft Blocker Specifications

Customizable Options

Frame Colors

Choose from Black, Beige, Bronze, Mill (Silver), Almond, and White to match your window frames and home décor. Pick your preferred color when ordering to complement your existing windows.

Frame Profiles

• Standard: 7/16” x ¾” - Ideal for most residential applications.
• Heavy-Duty: 5/16” x 1” - Suitable for areas requiring extra durability.
• Super Heavy-Duty: 7/16” x 1” - Best for high-traffic areas and larger windows.

Clear or Tinted Vinyl

Choose clear vinyl for maximum visibility, or upgrade to tinted vinyl for an additional $15.00 to help reduce glare and block UV rays without giving up your view. Tinted Clear vinyl is well suited for south- and west-facing windows, rooms with furniture or flooring that may fade from sun exposure.

Frame Clip Choices

• Spring-loaded plunger bolts: Choose two or four bolts along the height or width for easy installation and a secure fit.
• Tension springs with pull tabs: Available along the height or width sides for flexible and quick attachment.
• Swing over casement clips: For a stable and straightforward installation.
• No hardware: Available for installations that don’t require mounting hardware.

Center Cross Bar

Add an optional center cross bar to run parallel to either the width or height side of your Draft Blocker. This provides more rigidity and support for larger panels.

Add an Interchangeable Screen

Add a matching insect screen panel to your Draft Blocker for an easy all-season solution. Choose between fiberglass for an additional $45.00 or Super Screen for an additional $49.00, with each screen sized to match your Draft Blocker so you can swap them in the same window opening. You can use the Draft Blocker in the winter, then switch to a matching insect screen during warmer months when you want more airflow.

Applications for The Draft Blocker

• Windows: Our clear vinyl window inserts keep your home cozy by stopping cold drafts and providing exceptional insulation. Use Draft Blockers as custom-fit window insulation panels to add another layer of protection against cold air.
• Patios: Use our pre-assembled clear vinyl window screen inserts to winterize your patio during colder seasons. For added protection, find more vinyl screen panels for your patio.
• Porches: Installing pre-built vinyl porch panels can help reduce drafts, increase insulation, and reduce heating costs for your existing porch enclosure. Our porch panels with clear vinyl also help you protect your porch all year round.
• Sunrooms and Three-Season Rooms: Use our Draft Blockers to make your sunroom or three-season room more comfortable when temperatures drop. The clear vinyl helps reduce cold drafts without blocking the natural light or outdoor view.

Draft-Blocker Screen Benefits

• Made by hand in Colorado: Our Draft Blockers are made by hand in Colorado and cut to your measurements in 1/16-inch increments for a custom fit. Metro Screenworks has been manufacturing screens since 1979, bringing decades of experience to every order.
• Enhanced Comfort: Effectively halts cold air from drafty windows while also keeping out dust, pollen, and outside residue.
• Reduce Energy Bills: The US Department of Energy estimates that reducing drafts in your home can result in energy savings of 10% to 20% per year.
• Quick, Easy, & Affordable: Shipped directly to your doorstep, these budget-friendly vinyl inserts easily install into your window.
• All-Season Screen Solution: Order an identical size screen panel to swap during seasonal changes, promoting airflow on warmer days and utilizing the vinyl window shield for cooler seasons.

How to Measure for Your Window Draft Stopper

To ensure a perfect fit for your Draft-Blocker Screen, follow these steps:

• Width: Measure from finished opening jamb to finished opening jamb where the screen will be installed.
• Height: Measure from finished opening head to finished opening sill.
• Frame Profile: Choose the desired frame profile (Standard, Heavy-Duty, Super Heavy-Duty) and corresponding frame clips for your installation preference.

Measurements are accepted in 1/16-inch increments, and because Metro Screenworks builds your Draft Blocker based on the measurements you provide, use our measuring guide to measure the finished window opening rather than your existing panel.

Draft Blocker vs. Storm Windows

Exterior storm windows are a larger, permanent investment, while the Draft Blocker is a removable, reusable insert that mounts inside your window opening and is made to size. Compare the two below to see which fits your home.

Draft-Blocker Screen FAQ

How do I choose the right frame profile for my needs?

Choose from Standard, Heavy-Duty, or Super Heavy-Duty. Standard is ideal for most residential applications, while heavier profiles provide added durability.

Can I customize the color of my Draft-Blocker Screen?

Yes, you can choose from Black, Beige, Bronze, Mill (Silver), Almond, and White to match your home’s aesthetic.

What are the benefits of using clear vinyl for draft blocking?

Clear vinyl provides excellent insulation, stopping drafts and keeping your home warm during cooler months. It also helps in reducing dust, pollen, and outside residue from entering your home.

How do I install the Draft-Blocker Screens?

Our Draft-Blocker Screens come with frame clips (spring-loaded plunger bolts, tension springs with pull tabs, swing over casement clips) for easy installation. Detailed instructions are provided to ensure a perfect fit.

Can I use Draft-Blocker Screens year-round?

Yes, for a year-round solution, order an identical size screen panel to swap during seasonal changes. This allows you to promote airflow on warmer days and utilize the vinyl window shield during cooler seasons.

Do you offer quantity discounts?

Yes, we offer quantity discounts. Please contact us for a price quote.

Do window draft stoppers actually work?

Yes. According to the U.S. Department of Energy, reducing drafts in your home can result in energy savings of 10% to 20% per year. The Draft Blocker helps seal the window opening it covers, while whole-home results depend on other areas where air may enter or escape.

Can I use the Draft Blocker as an interior storm window?

Yes. The Draft Blocker can be used as an interior storm window that mounts inside your existing window opening. Its removable, reusable design provides an extra layer of protection against drafts without requiring exterior installation.

What size window draft stopper can you make?

Draft Blockers are available from 12 to 54 inches wide and 12 to 80 inches tall, with measurements accepted in 1/16-inch increments. Single units over 15 square feet are considered oversized.

Configure your Draft Blocker to the size you need for a custom fit.

Planning to cover multiple windows? Request a quote for quantity pricing, or visit our Denver showroom for in-person assistance and pickup.