If you’re considering building a metal structure like a Quonset hut, making sure that it’s properly sealed should be a top priority. Sealing a metal building, especially around the foundation, helps protect it from water infiltration, which can lead to rust, weaken the structure, and even compromise insulation. In particular, Quonset huts, with their distinctive curved design and fewer seams, require extra attention when it comes to foundation sealing. Focusing on this crucial step can mean the difference between a durable, long-lasting structure and one that deteriorates prematurely.

In this blog, we’ll explore why waterproofing a metal building is so essential and outline the steps to ensure proper sealing.

Why Sealing and Waterproofing a Metal Building Is So Crucial

Waterproofing and sealing the foundation and seams of any enclosed walls are important steps in protecting metal buildings such as Quonset huts. AgriBilt’s Quonset hut models, for example, with their curved design, often require special attention at the foundation level to ensure long-term protection from a number of risks, including:

  • Water damage: Perhaps the biggest threat to a metal building is moisture, which can enter through gaps or the foundation and cause rust to form on the metal surfaces, ultimately weakening the structure.
  • Foundation erosion: If water seeps into the ground near the foundation, it can erode the soil and lead to uneven settling – or worse, foundation failure. This type of damage can result in expensive repairs and major structural issues.
  • Insulation problems: Poor sealing also allows moisture to permeate the insulation. Not only does this compromise the building by reducing its structural integrity, but it can potentially lead to dangerous mold growth as well.

Steps Involved in Sealing Gaps in a Metal Building

Step 1: Assess Vulnerable Areas

Before beginning the sealing process, you should identify those areas that are most prone to water infiltration. Common vulnerable spots include:

  • Foundation
  • Seams and Overlaps
  • Windows and Doors

Step 2: Choosing the Best Sealant for Metal Buildings

Selecting the right type of sealant is super critical for achieving long-lasting waterproofing. Here are a few common types used in metal buildings:

  • Silicone-based sealants: Known for their flexibility and durability, even under extreme temperature changes, silicone sealants are ideal for sealing gaps around windows, doors, and seams.
  • Polyurethane sealants: Highly resistant to water and UV rays, polyurethane sealants are great for outdoor use, particularly around the foundation, as they provide excellent protection against water seepage.
  • Butyl tape: This material is frequently used to seal overlaps between metal panels, providing both easy application and long-lasting waterproofing.

Step 3: Applying the Sealant

Before applying any sealant, you’ll want to clean the surface thoroughly to ensure proper adhesion. Once the surface is prepared:

  • For the foundation: Use a polyurethane sealant to create a waterproof barrier along the base and floor joints so that water cannot seep in from below.
  • For seams and overlaps: Apply silicone or butyl tape along the seams and panel overlaps to prevent water infiltration through these areas. Pay special attention to sealing any gaps around windows, doors, and vents.

How Long Does It Take to Seal a Metal Building?

In general, sealing a metal building doesn’t take long, although the time frame can vary depending on the size and complexity of the structure:

  • Smaller Quonset huts can usually be sealed within 1–2 days.
  • Larger metal buildings or those with significant foundation issues may take 3–5 days to complete the sealing process.

It’s also important to consider the curing time of the sealant used. Most silicone and polyurethane sealants require 24–48 hours to fully cure, though some can take up to 72 hours for optimal waterproofing.

To really protect your building and keep it in tip-top shape over the long haul, it’s recommended that you inspect the seals annually and reapply as necessary, especially in areas exposed to extreme weather conditions.

Keep Your AgriBilt Quonset Hut Protected

Sealing a metal building, especially around the foundation, is essential for preventing water damage, foundation erosion, and rusting. By taking the right steps to seal your AgriBilt Quonset hut, you can ensure its longevity and structural soundness for years to come.

Ready to protect your Quonset hut? Contact AgriBilt to ensure your metal building is properly sealed and ready for the elements.

And if you’re looking at replacing an old, rusted metal building, reach out today for clearance pricing on select models that are only available by phone at (888) 926-1171.