How to Seal Roll-up Door Gaps

Because of the cost effectiveness of roll-up doors, they are a popular choice for metal garages and buildings. One common issue with these doors is the gaps that form around the top, bottom, and sides. This can compromise the structure and allow the elements, dust, moisture, and pests into the building.

Fortunately, there are quite a few efficient and cost-effective solutions that will remedy this situation.

Want to get a quote on a metal building with roll-up doors that won’t have gaps? A Carport Co. representative would be happy to discuss the best solutions for your specific situation. Call (317) 300-4190, or email [email protected]. Thank you for choosing The Carport Co. for your project!

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Photo showcasing brush seal installed on both a roll-up door and an overhead (flat) door. Brush seal is used to seal gaps around roll up doors on metal buildings and garages.

What is Brush Seal?

Brush seal is a product intended to seal the gaps in between the trim of metal buildings where a roll-up door is installed and the ridges of a corrugated roll-up door. It consists of dense flexible bristles that conform to the surface of the roll-up door and frame of the building. Brush seal is ideal for areas prone to wind-driven rain and pests, providing protection around the sides of the door to keep the elements out.

How Much Does Brush Seal Cost

Brush seal has a higher entry cost than other sealant types in this article, but there really aren’t any alternatives to. Brush seal costs range from $100 for a smaller 6 foot wide door, to up to $300 for an 18 foot wide door.

Recommended Brush Seal

What is Header Seal?

Header seal is designed to close and seal the gap at the top of roll-up doors where it meets the top level of trim around the door. It’s typically made from a durable and flexible heavy-duty rubber or vinyl. It’s designed to withstand harsh weather, ensuring a long-lasting solution.

How Much Does Header Seal Cost?

Header seal, especially vinyl header seal, is very cost-effective, typically ranging from $50 for a smaller 6 foot wide door, to $115 for a larger 14 foot wide door. PVC header seal only costs about $40 for 18 feet.

Recommended PVC Header Seal

Photo of prefabricated metal garage building with three roll up doors that have gaps underneath the door and around the roll-up door allowing light, moisture, dust, and the elements into the building.

What is Bottom Threshold Seal?

Bottom threshold seal is a rubber seal that goes underneath roll up doors and prevents water from coming into the structure. Purchasing a roll-up door with a bottom threshold seal, or adding one yourself, is very important to ensure you’re keeping water out of the structure. The good news is that the doors most manufacturers sell already come with this installed.

How Much Does Bottom Threshold Seal Cost?

We strongly recommend everyone who purchased a roll-up door that didn’t come with a bottom threshold seal add one themselves. The good news is bottom threshold seal is very affordable, costing less than $25 for a 10 foot wide door.

Recommended Bottom Threshold Seal

Wrapping up our Roll-up Door Gap Closing Discussion

Customer who purchase metal buildings are typically trying to save money on the cost of a building. Because of this, roll-up doors are a very popular choice. Unfortunately, they do come with some drawbacks, like gaps at the bottom, sides, and top. The good news is there are several products on the market to seal these gaps and prevent the elements, air, light, and pests from entering the building.

Red Carport with Curved Roof and no Sides Surrounded with Pentago above The Carport Co. in Writing. The Carport Co. sells metal buildings and metal carports.

Choose The Carport Co. as Your Carport Provider

At The Carport Co., we’re committed to helping you navigate the prefabricated metal building and carport shopping process with ease. If you have questions, or need help to ensure your roll-up doors are adequately sealed, our experts are here to help.

Ready to find your perfect carport? Contact The Carport Co. today!

Frequently Asked Questions

Sealing a roll-up door helps prevent drafts, dust, pests, and moisture from entering the building, which will protect the interior from damage.

Yes, you can install all these products with ease yourself. They are designed with a DIY install in mind. For larger or more complex doors, you may considering hiring a professional to ensure a better fit, long term durability, and warranty.

Yes, every seal we’ve discussed in this article is weather resistant.

No, installing seals on a roll up door should not affect the operation of the door, as long as you ensure a secure fit. They are designed to work with the door’s movement whilst providing a tight fit.

Yes, sealing gaps reduces heat loss in winter and keeps cool air in during the summer, leading to lower heating and cooling costs.

In addition to the products we’ve recommended and linked to in this article, you can find brush seal, header seal, and bottom threshold seal from various places, like local prefabricated metal building manufacturers, hardware stores, and home improvement centers.

Ready to Begin Your Project?

Do you think The Carport Co. would be a good fit for you? We’d love to earn your business. Fill out the quote form, and one of our friendly representatives will be in touch with you shortly. We’re here to answer questions you may have, provide personalized recommendations, and get you an estimate on your project.

To speak with someone, call (317) 300-4190 or email [email protected].

Don’t miss out on the opportunity to enhance your property with a durable, versatile, and visually appealing metal structure. Contact The Carport Co. today and experience what we can do.

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The Ultimate Buyer’s Guide is a collection of articles by The Carport Co. These articles have been catered to first time steel and metal carport, garage, and commercial building buyers. Our goal is to share as much information with customers as possible, to help make informed decisions, and ensure a customer doesn’t discover an addition they would have liked to added at the time of sale, but was not aware of the option’s existence. 

Here is a preview of a few articles. To view the full Buyer’s Guide, please visit the Ultimate Buyer’s Guide page.