Insights > Article > Posted: 2025-Mar-20, Updated: 2025-Oct-07
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This article explores the types of weatherstripping commonly used on new doors, how they work, and how to choose the right one.
Door weatherstripping seals gaps between the door and frame to prevent air, moisture, and noise infiltration. For new doors, manufacturers often integrate multiple types and configurations to optimise performance.
Weatherstripping is integrated into the manufacturing process of new doors to provide effective sealing and insulation from the very beginning of the product’s life cycle. Retrofit weatherstripping solutions can also be installed as supplemental or replacement measures to improve weather resistance and reduce air leakage in older structures. For the best performance, consult the manufacturer to ensure compatible components and a proper fit.
Please note: Bayview Windows does not offer retrofit weatherstripping services
There are two main areas where weatherstripping is applied:
Located at the bottom of the door, the threshold plays an important role in sealing the space between the door and the floor. It helps prevent drafts, moisture, insects, and dust from entering the home while improving energy efficiency and comfort.
Different styles of door sweeps and threshold seals are available to suit various door types, installation needs, and performance requirements, including:
Installed along the sides and top of the door frame, door jamb weatherstripping creates a tight seal when the door is closed. It helps block drafts, moisture, dust, and noise from entering through the gaps around the door while improving overall energy efficiency and comfort.
Different types of weatherstripping are designed to fit various door materials, jamb profiles, and performance needs, including:
Exterior door bottom sweeps are installed along the bottom edge of exterior doors to seal out drafts, moisture, dust, insects, and noise. Usually made from rubber, vinyl, or bristle brush materials, they help improve comfort and efficiency. Here are some pros and cons to consider:
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A U-shaped sweep is a type of weatherstripping that is attached to the bottom of the door. It is typically made of flexible materials such as rubber or vinyl. The U-shaped sweep is designed to be screwed or nailed onto the bottom edge of the door, forming a seal against the threshold. When the door is closed, the U-shaped sweep compresses against the threshold, creating a barrier against drafts, insects, and moisture. U-shaped sweeps can include and combine several other styles of sweeps, including brush, rain drips, shoe, and bottom sweeps, and are typically made of vinyl or rubber.
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Automatic door sweeps, also known as automatic door bottoms, are a type of door sweep that operates automatically when the door is closed. They have a mechanism that lowers a seal or brush to the floor as the door closes, creating a tight seal.
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A slide-on sweep, also referred to as a snap-in sweep or door bottom seal, is another type of weatherstripping used for the bottom of exterior doors. It consists of a rigid or semi-rigid strip with a flexible sealing component, often made of vinyl or rubber. Unlike the u-shaped sweep, the slide-on sweep is not attached with screws or nails. Instead, it is designed to be easily installed by sliding the sweep onto the bottom edge of the door. The flexible sealing component of the slide-on sweep creates a tight seal against the threshold when the door is closed, providing protection against drafts, insects, and outside elements.
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Entrance door brush sweeps are a type of door sweep that utilizes bristle brushes along the bottom of the door to create a seal.
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Entrance door triple-fin door sweeps are a type of door sweep that features three flexible fins or blades that create a seal against drafts, insects, dust, and noise.
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Entrance door adjustable door sweeps are a type of door sweep that can be adjusted to accommodate varying floor heights or uneven surfaces. They typically have a mechanism that allows the length or height of the door sweeps to be modified.
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Entrance door interlocking door sweeps are a type of door sweep that features interlocking or overlapping segments that create a seal when the door is closed. They are designed to provide a secure and tight seal against drafts, insects, dust, and noise.
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Entrance door shoe sweeps, also known as door shoes or door bottoms, are a type of door sweep that attaches to the bottom of the door and extends beyond the door edge. They are typically made of aluminum or other sturdy materials.
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Acoustic door sweeps help reduce sound passing under doors by creating a seal. Their effectiveness depends on the sweep quality and the level of sound you want to block. They work best when combined with other soundproofing methods, like sealing gaps, adding curtains or vinyl, and improving room insulation. Acoustic door sweeps are usually sold as aftermarket add-ons.
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Also known as rain deflectors, rain guards or rain drip caps, are a type of door sweep designed to divert water away from the door and threshold area. They typically feature a sloped or angled design to prevent rainwater from entering. Rain drip caps are often incorporated into various types of sweeps.
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Compression seal weatherstripping is often utilized for exterior doors. It is made of rubber or silicone and creates a tight seal when the door is closed. Compression seal weatherstripping effectively reduces air infiltration and provides insulation.
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V-strip weatherstripping is often made of durable materials like vinyl or metal and is effective at sealing gaps and preventing drafts in colder climates.
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Bulb seal weatherstripping for doors is a flexible and durable sealing material that blocks drafts, air leaks, and moisture, improving energy efficiency and providing protection against the elements.
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Magnetic weatherstripping is primarily used on metal doors. Magnetic weatherstripping consists of a magnetic strip attached to one surface and a metal strip attached to the opposing surface. When the door is closed, the magnetic strip creates a strong seal against the metal strip, providing a tight barrier against drafts, air infiltration, and moisture.
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Designed to provide a durable and effective barrier against air, water, and noise infiltration. It consists of metal strips with interlocking profiles that fit together when the door is closed, creating a nice, tight seal.
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Brush-type weatherstripping, also known as bristle or brush weatherstripping, is a type of weatherproofing material used to seal gaps and provide insulation around doors
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Pile weatherstripping, with its dense and flexible fibres, offers excellent insulation against cold air infiltration and helps maintain a warm interior environment.
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When choosing weatherstripping, consider your climate, door type, and how the door will be used. In cold climates, tight compression or magnetic seals work best, while humid or wet environments benefit from durable silicone or vinyl options.
Tip: For high-traffic entrances, replaceable sweeps or adjustable seals offer convenience and longevity. Keep in mind that pre-installed weatherstripping on new doors is designed for optimal fit and efficiency.
Even the best weatherstripping needs a little attention to stay effective. Take time each year to check for drafts or gaps, replace any worn or damaged sweeps and seals, and give brush-type sweeps a quick cleaning to keep them working properly.
Properly installed weatherstripping reduces heat loss, prevents drafts, and lowers energy costs. Paired with energy-efficient doors, it helps maintain indoor comfort year-round.
Weatherstripping is essential for the performance of a new door. Properly installed seals help prevent drafts, moisture, dust, and noise from entering your home, ensuring comfort and energy efficiency. With a variety of materials and styles available, it’s important to choose the right type for your climate and usage. Regular inspection and maintenance will also extend the life of both your door and its weatherstripping, keeping it effective for years to come.