Thresholds & Seals – Keep Buildings Energy Efficient and Secure

Weatherproof, Compliant, and Built to Perform

When it comes to doors, most people focus on locks, closers, or panic hardware but thresholds and seals do the critical work of securing the perimeter, preserving energy efficiency, and ensuring code compliance.

At ZenSupply, we carry a full selection of commercial thresholds, door bottoms, gasketing, and weather seals designed to keep out wind, water, noise, pests, and drafts while protecting what’s inside.

Whether you're managing a retrofit, new build, or facility upgrade, ZenSupply makes it EASY to source and ship the products that keep your buildings sealed, efficient, and secure.

Why Thresholds & Seals Matter

Thresholds and seals might seem like small details but they do heavy lifting across multiple building performance areas:

• Prevent air and water infiltration
  
  
• Reduce heating and cooling loss
  
  
• Block pests and debris
  
  
• Support ADA accessibility and code compliance
  
  
• Enhance acoustic privacy
  
  
• Extend the life of door hardware and flooring
  
  

Neglect these components, and energy bills climb, compliance suffers, and your doors degrade faster.

Commercial Thresholds We Stock

ZenSupply offers code-compliant, high-durability thresholds for every entryway from storefronts and hospitals to warehouses and schools.

Saddle Thresholds

The most common type of threshold used in commercial settings.

Features:

• Flat or slightly raised profile
  
  
• Ideal for single or double doors
  
  
• Supports ADA compliance with beveled edges
  
  
• Extruded aluminum, stainless steel, or bronze options
  
  
• Available with or without thermal breaks
  
  

Best for:

• Office doors
  
  
• Classroom entries
  
  
• Interior corridors
  
  
• Light-duty exterior doors
  
  

Top Brands:
Pemko, NGP, Zero International

Bumper Thresholds

These include an integrated seal that forms a tight closure against the door, improving weatherproofing.

Applications:

• Loading docks
  
  
• Exterior utility rooms
  
  
• Back-of-house restaurant doors
  
  
• Doors needing added rain or sound protection
  
  

Benefits:

• Built-in compression seal
  
  
• Resists water, air, dust
  
  
• Pairs well with door sweeps
  
  

Thermal Break Thresholds

Designed to reduce the transfer of heat and cold across door openings.

Use Cases:

• Climate-controlled buildings
  
  
• Cold storage and freezer doors
  
  
• LEED-certified facilities
  
  

Benefits:

• Improved energy efficiency
  
  
• Support for green building standards
  
  
• Available in multiple profiles and widths
  
  

Ideal for buildings in extreme climates or with heavy HVAC usage.

Panic & ADA Thresholds

These thresholds accommodate exit devices and ADA-compliant door clearance.

Features:

• Lower heights
  
  
• Sloped bevels
  
  
• Wide enough for wheelchair clearance
  
  
• Compatible with exit hardware and vertical rods
  
  

Ensure compliance with ANSI A117.1 and IBC Chapter 10.

Seals, Sweeps & Gasketing

Pair thresholds with the right seals and gaskets to create complete, code-compliant door assemblies.

Door Sweeps & Bottom Seals

Mounts to the bottom edge of the door to block drafts, light, pests, and sound.

Options Include:

• Brush sweeps
  
  
• Rubber/neoprene sweeps
  
  
• Automatic drop seals
  
  
• Fin seals for extra insulation
  
  

Perimeter Gasketing

Installed on the door frame to create a continuous seal around the top and sides of the door.

Materials:

• Silicone
  
  
• Neoprene
  
  
• Vinyl
  
  
• Thermoplastic elastomer
  
  

Fire & Smoke Rated Versions Available

Prevents air leakage
Improves acoustic and thermal performance
Compliant with NFPA and UL standards

Acoustic & Smoke Gasketing

Specifically designed to block noise transfer and smoke infiltration.

Use Cases:

• Hospitals and cleanrooms
  
  
• Music rooms and theaters
  
  
• Server rooms and labs
  
  
• Multi-family housing units
  
  

Brands We Stock:
Pemko, Zero, NGP, Hager

Who Needs Thresholds & Seals?

Every commercial building benefits from a well-sealed door system. ZenSupply supplies contractors, facilities, and property managers across:

• Construction & Renovation – Ensure door packages are energy- and code-compliant
  
  
• Healthcare & Education – Reduce airborne contamination, noise, and drafts
  
  
• Hospitality & Retail – Improve customer comfort and reduce energy loss
  
  
• Property Management – Protect buildings from pests, rain, and thermal inefficiency
  
  
• MRO & Facilities Teams – Replace worn-out seals and damaged thresholds fast
  
  

Why Choose ZenSupply?

✅ Commercial-Grade Inventory

We stock only spec-grade, code-compliant products, no cheap imitations.

✅ Fast Shipping, Nationwide

Real-time inventory. Same-day order processing. Reliable, fast delivery.

✅ Expert Support

Need help choosing between ADA vs. thermal break thresholds?
Chat, text, or email a Zen Advisor real-time.

✅ Loyalty That Pays

With ZenSupply Rewards, you earn points on every order.
Redeem them for:

• Gift cards
  
  
• Discounts
  
  
• Pro perks
  
  

Threshold & Seal Brands You Can Trust

Brand	Specialization
Pemko	Thresholds, sweeps, drop seals
NGP	Fire-rated and acoustic gasketing
Zero International	Premium thresholds and sound seals
Cal Royal	Durable aluminum thresholds
Hager	Door bottoms and perimeter seals

All brands are ANSI/BHMA-certified, field-tested, and ready for the real world.

Common Questions

Q: How do I choose the right threshold?
A: Consider traffic type, ADA compliance, energy efficiency, and door hardware compatibility. Zen Advisors can guide you in seconds.

Q: Are seals and sweeps easy to install?
A: Most can be surface-mounted with screws or adhesive. Drop seals may require mortising.

Q: Can I retrofit thresholds and seals?
A: Yes, many products are designed for retrofits without modifying the frame or door.

Final Word: Seal the Deal on Performance

Poorly sealed doors cost you more than energy, they invite pests, fail inspections, and damage your reputation.

ZenSupply makes it EASY to upgrade with

✔ Energy-efficient thresholds
✔ Code-compliant seals
✔ Trusted brands
✔ Real-time support
✔ Rewards on every order

From thermal breaks to drop seals every detail matters.

Ready to Weatherproof and Secure Your Doors?

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