Types of Door Sweeps and Under Door Seals

Here’s our guide to the best types of door sweeps and under door seals including their definitions, advantages, and product tips for weatherproofing and keeping out pests.
Man installing garage door weatherproofing garage door sealGaps are normally found between the bottom part of the door and the door frame. For some people, gaps aren’t a big deal. 

But for most people, it’s a major problem that needs to be fixed immediately. Luckily, there are effective ways in solving that problem. Numerous manufacturers are producing door sweeps that will solve those gap issues.

In reality, gaps do need to be fixed and they shouldn’t be neglected. These small openings could either allow cold air to go inside the space during the winter season or prevent air-conditioned rooms from getting cold during summer. Gaps also give way to insects and other pests.

Door sweeps and under-door seals play a very crucial part in fixing these gap issues. In this article, we will discuss the definition of a door sweep and under-door seal. We’ll also talk about the categories under these two things.

What Is A Door Sweep? 

Door seals in the lower part of the threshold less shower enclosureThe main function of a door sweep is to seal the gaps that are found between the threshold and the bottom of your door.

With properly installed door sweeps, heating or cooling your interior space won’t be a fuss. Dust, insects, or rodents will be prevented if door sweeps are installed in those gaps.

What Is An Under Door Seal?

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Under-door seals are also called door bottom seals. These are designed to seal the gaps between the door and the bottom most part of the door.

The usual style of an under-door seal is made up of sweep seals that contain an aluminum-made holder along with a pliable rubber strip or brush strip attached to the bottom part of the door. Check out how to soundproof a door for more ideas. 

Door Sweep Vs Under Door Seal 

Door sweeps are usually applied to common thresholds that have a 0.13-inch gap between the bottommost part of the door and above the threshold.

Generally, a door sweep is a long metal strip that carries a seal that’s made out of silicone, nylon brush, or neoprene. The surface of the long metal strip is installed to the door’s bottom part.

Under-door seals function the same as door sweeps. Under-door seals can be either mounted directly to the bottom of the door or wrap the whole bottom on one or both sides of the door. However, some under-door seals can seal the gaps more effectively than door sweeps.

Brush Door Sweep

See this Pemko door bottom sweep gray nylon brush at Amazon [Sponsored link]

A brush door sweep is generally mounted on one side of the exterior door. The brush sweep resembles a broom and it has two functions.

First, it helps in clearing away detritus and dust. Second, it helps in sealing the bottom part of the door.

This type of door sweep is effective in terms of preventing cold air from getting inside your house during the winter season. However, the downside of this sweep is it isn’t durable. The bristles on the door sweep will deteriorate over time and it won’t last very long.

Aluminum Door Sweep

See this MD building aluminum heavy duty door sweep at Amazon [Sponsored link]

Aluminum door sweeps are superior in terms of stopping moisture, insects, and dust from coming inside your interior space.

Door sweeps that are made out of aluminum are efficient in sealing gaps properly and they do not rust over time. They also can be painted and are easy to install.

Adhesive Door Sweeps

See this door draft stopper self-adhesive door seal at Amazon [Sponsored link]

These door sweeps do not require screws to be mounted as they already have their own adhesive tapes or stickers. Adhesive door sweeps can either be made out of plastic or aluminum.

These door sweeps are efficient against dust, moisture, insects, and drafts. They can usually stick to all types of doors.

Flat Door Sweep

See this Holikme twin door draft stopper flat door sweep at Amazon [Sponsored link]

Just like a brush door sweep, a flat door sweep is also attached to the exterior door. Generally, it could be made out of materials such as nylon, vinyl, or silicone.

It offers an aesthetic appearance that provides more attraction and value to the door. Yes, it is way more appealing than brush door sweeps.

Flat door sweeps, on the other hand, could be more difficult to install than brush door sweeps. 

Tubular Door Sweep

Man changing rubber tubular sweep seal gasket in pvc doorIf you want to opt for a door sweep that will perfectly and securely fit the bottom of your door, a tubular door sweep might be a good choice as it seals both sides of the door.

It can function on both exterior and interior doors. Also, it is very easy to mount and replace. Actually, it is a popular choice as it is efficient in blocking odors, insects, and cold air.

The only drawback of a tubular door sweep is that it is not long-lasting.

U-shaped Door Sweep

This type of door is also known as a wrap-around door sweep. It provides one sweep to each side of the door. Meaning, you’ll have two sweeps sealing the bottom of your door. 

That is to provide an additional level of protection to efficiently keep out pests, smoke, odor, and air. It is very much simpler to install than most types of door sweeps.

Most of the u-shaped door sweeps can be painted so that you can match them with the color of your door, walls, and floors.

Weather Stripping

A weather stripping draught sausage sits on the wooden floorA less expensive way of sealing the gap between your threshold and door is called weather stripping. It is also known as gasketing. Weather stripping won’t require complicated installation.

It can be mounted along with self-adhesive brands. This is a very fast method of solving gap issues.

However, the downside of weather stripping is that it is not appealing and long-lasting. But if you want to opt for a temporary solution for sealing the gap, this is a good option.

Under this method, there’s also a way of sealing small gaps. It is by using V-strips. This is efficient in terms of keeping out insects and air. 

Its longevity is very promising as well. V-strips can either be made out of rubber or metal. They are very easy to mount. On the other hand, they also aren’t appealing and they can’t seal huge gaps.

Foam Stripping

Putting foam strip onto window indoorsThis method is also under the category of weather stripping although it is particularly used for windows and doors. But compared to actual weather stripping, foam stripping is generally much thicker and more robust. 

It’s very affordable and uncomplicated to mount. It can virtually match other great door bottom seals in terms of keeping out odor, air, and pests.

Double Draft Seals

These double draft seals are mainly used for insulating your door on each side of it. It provides long-lasting protection against water, insects, pollen, dust, moisture, and drafts.

Normally, the first level of the seal is to block drafts and the second level is to keep out water and moisture.

They normally incorporate fabric coverage and foam-based inserts. They are mounted to the bottom of your door along with stretchable straps.

Triple Draft Seals

A triple draft seal is normally a slide-on door seal that is very efficient in terms of blocking drafts under doors. Read more about the most popular types of sliding doors here.

Just like double draft seals, they can also prevent insects and pollen from getting inside your interior space. 

However, they have three levels of protection. The first seal helps in retaining the temperature inside the space.

The second seal blocks the drafts while the third layer of seal works in keeping out moisture and water. Triple draft seals are very easy to install as well.

Door Shoe

A door shoe can either seal one side of your door or wrap the bottom of it. The undercut of your door must be correctly coordinated with door bottoms so they can fit properly. 

An L-shaped door shoe is a good choice for sealing your exterior doors. Although it necessitates careful installation, it’s very efficient in terms of preventing air, pests, odor, and smoke.

L-shaped door shoes are normally made out of sturdy metal-based materials that ascertain longevity.

Automatic Door Bottom

Surface-mounted automatic door bottomSee this surface-mounted automatic door bottom at Amazon [Sponsored link]

Automatic door bottom seals effectively seal the gaps by just activating its button. Once the door is opened, the button will be released and the sealing material will pull itself and fully seal the bottom part of the door. Compared to door sweeps, automatic under-door seals can provide a maximum seal. 

However, it could be hard to install. And since it is a high-end option that will fully secure your doors, it might be an expensive selection.

Felt Door Bottom

Weather stripping self adhesive felt door brush strip door seal stripSee this weather stripping self adhesive felt door brush strip at Amazon [Sponsored link]

A felt door bottom is quite the same as weather stripping and foam stripping. It is very fast and simple to attach. One major advantage of it is that it is fire-resistant, very long-lasting, and affordable.

Best Type Of Door Sweep 

A man seals doorway with silicone ssGenerally speaking, the best option for weatherproofing doors are automatic door bottom seals, as they give the utmost security that will truly seal the gaps most efficiently.

For an exterior door, the best types of door sweeps would be a door sweep with weather stripping, a combination of aluminum and brush door sweep, a U-shaped door sweep, and a metal door sweep with triple draft seals. These options provide the best protection.

For front doors, the best option could be an adhesive door sweep or automatic door bottom seal. For a metal door, the best type of door sweep could be a combination of aluminum and brush door sweep or a metal-based U-shaped door sweep.

 For more related ideas, visit our gallery showcasing attractive front door colors with their meanings.

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Written by Khaycelyn - Author

Khaycelyn Dimaano is a Bachelor of Science and Information Technology graduate who pursues her dream to work from home as a skilled interior design writer.

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  1. We are looking to reduce the noise across a pocket door. We thought that brush sweeps would be useful at the top and in-wall sides. The strike side we will use foam gaskets. The bottom of the door may be a drop gasket or another brush. The bottom though, would have to be adhered to the bottom or routed out. We’d like to know if you can advise us as to whether a pile brush or regular brush sweeps would be better.

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