Door Bottom Seals

Door Bottom Seals

Door bottom seals are critical components in maintaining the performance, safety, and comfort of door systems across commercial, residential, and industrial applications. These seals are fitted to the underside of a door to create an effective barrier against sound, smoke, drafts, dust, insects, and in some cases, fire. John Barnes Group offers a comprehensive selection of high-performance door bottom seals from leading manufacturers Kilargo, Lorient, and Raven—brands known for their reliability, compliance, and innovation.

Whether you're working on a fire-rated commercial project, retrofitting a residential property, or ensuring acoustic isolation in performance spaces, our range of door bottom seals provides solutions that meet Australian standards while supporting aesthetic and functional goals. Buy Door Bottom Seals online today from the John Barnes online shop!

What Are Door Bottom Seals?

Door bottom seals are devices mounted to or recessed into the bottom edge of doors to seal the gap between the door and floor or threshold. They serve to control air movement, temperature regulation, sound insulation, smoke containment, and pest exclusion. These seals are commonly used in combination with perimeter seals and meeting stile seals to complete a door sealing system.

There are two primary categories:

• Automatic drop seals – Self-lowering seals that engage only when the door is closed

• Fixed seals – Static brush or rubber seals continuously in contact with the floor or threshold

Types of Door Bottom Seals

Buy Automatic Drop Seals online

Drop seals are mechanically activated to lower a sealing strip when the door closes, providing a tight seal without creating friction or drag during door operation.

Use cases:

• Acoustic doors

• Fire-rated doors

• Office doors with carpet or threshold variations

Buy Surface-Mounted Seals online

These are fixed to the face of the door and are ideal for retrofit applications. Available in brush, rubber, or combination profiles.

Use cases:

• Existing doors needing simple upgrade

• Residential doors

• Light commercial applications

Buy Rebated or Morticed Seals online

Concealed within a routed groove in the door bottom, these seals are favoured in high-end applications for their minimal visual impact.

Use cases:

• Architecturally designed interiors

• Hotels

• Fire and acoustic-rated assemblies

Buy Threshold Drop Seals online

Installed into the door or frame with a spring-loaded mechanism that compensates for floor variation. Suitable for high-traffic doors.

Use cases:

• Commercial entryways

• Double swing doors

• Accessibility-compliant entries

Buy Brush Bottom Seals online

Flexible nylon or polypropylene bristles that block light, dust, and insects. Ideal for non-critical applications and uneven surfaces.

Use cases:

• Garage doors

• Storage rooms

• Internal utility spaces

Key Features and Specifications

• Seal Types: Drop seals, brush seals, rubber or silicone blade seals

• Fixing Options: Surface-mounted, semi-morticed, fully morticed

• Materials: Aluminium carriers with silicone, EPDM, or TPE inserts

• Lengths: Available in standard and cut-to-size configurations (typically 300mm to 1200mm)

• Fire Rating: Tested to AS1530.4 for fire doors

• Acoustic Rating: RW ratings up to 40+ when used as part of a sealing system

• Finishes: Clear anodised, bronze, black, and custom powder-coated options

Australian Standards and Compliance

Door bottom seals at John Barnes Group meet or exceed national construction and fire safety standards:

• AS1530.4: Fire resistance testing

• AS/NZS 1905.1: Fire door sets

• AS1530.7: Smoke leakage testing

• ISO 717-1: Acoustic insulation ratings

• AS1428.1: Accessibility—ensuring seals do not impede door movement or clearance

Material and Durability

Aluminium with Silicone Blades

The most common combination for high-performance applications. Silicone retains flexibility over time and under varying temperatures.

EPDM and TPE Seals

Durable, impact-resistant rubber materials offering excellent thermal sealing and acoustic properties.

Brush Seals

Economical and flexible for basic sealing needs, though less effective for sound or fire control.

Applications: Residential vs Commercial

Residential Applications

Homeowners use door bottom seals to increase comfort, energy efficiency, and hygiene. Common residential applications include:

• Front and back doors for draft control

• Laundry doors to block moisture and pests

• Bedroom or media room doors for sound insulation

Preferred options include low-profile automatic drop seals in aesthetic finishes like black or satin.

Commercial Applications

In commercial environments, door bottom seals contribute to building compliance, safety, and environmental control. Use cases include:

• Hospitals: Smoke and fire containment

• Offices: Acoustic isolation for meeting rooms

• Hotels: Guest room privacy and comfort

• Education: Classroom noise control

Brand Highlights

Buy Kilargo Door Bottom Seals online

Renowned for their fire and smoke containment expertise, Kilargo offers a broad selection of compliant drop seals suitable for fire doors, acoustic assemblies, and energy-efficient buildings. Their designs are certified to Australian standards and trusted by architects and specifiers across Australia.

Buy Lorient Door Bottom Seals online

Lorient's door bottom sealing systems combine high-level performance with discreet installation. Their range is ideal for projects requiring acoustic, smoke, and fire solutions without compromising design integrity.

Buy Raven Door Bottom Seals online

A leader in Australian sealing technology, Raven offers a wide range of drop seals and brush seals for every level of application. Their products are widely used in commercial and residential developments and known for ease of installation and reliable performance.

Selection Guidance

For Architects and Designers

• Match finish with other hardware for visual cohesion

• Specify drop seals in high acoustic or fire-rated applications

• Ensure AS1428.1 compliance for accessible doors

For Builders and Installers

• Choose seal length based on door size and cut margin

• Confirm compatibility with door material and flooring type

• Install as per manufacturer guidelines to ensure compliance

For Residential Clients

• Look for low-profile or concealed options to maintain door aesthetics

• Prioritise seals with good thermal and sound insulation properties

• Match finishes with handles and hinges for design consistency

Installation Tips

• Drop seals should align with the door bottom and make even floor contact

• Ensure actuation button faces hinge side (unless otherwise specified)

• For surface-mounted seals, seal should not obstruct door swing or strike plate

• Use appropriate screws or adhesives based on door material

Maintenance and Care

• Regularly inspect for wear or damage

• Clean with soft cloth and mild cleaner to maintain appearance

• Check actuation mechanisms for smooth operation

Order from John Barnes Group

John Barnes Group is your trusted source for premium-quality door bottom seals suited to a wide range of projects. Our experts provide:

• Fire and acoustic compliance support

• Product matching with door hardware

• Customised recommendations for residential, commercial, or institutional use

Contact us today for expert support and fast order turnaround: https://johnbarnesgroup.au/contact/