Norseal NOR615 Door Threshold Plate is a low-profile aluminium threshold plate designed to provide a firm, smooth and even sealing surface beneath a door.
Measuring 40mm wide and 4.9mm high, the NOR615 can improve the effectiveness of automatic drop seals and other door-bottom seals by giving the flexible gasket a consistent surface against which to close.
The gently curved profile also covers narrow joins between different floor finishes, creating a neat transition across the doorway.
The NOR615 is installed on the floor directly beneath the door leaf.
It is commonly used to:
Automatic drop seals work most effectively when their gasket closes against a firm, smooth and continuous surface.
Carpet, grout joints, worn flooring and changes between different floor finishes can prevent a gasket from making consistent contact across the entire doorway.
The NOR615 creates a fixed aluminium sealing surface beneath the door. When the door closes, the drop-seal gasket lands on the threshold plate rather than the uneven or compressible floor beneath it.
This can help reduce small gaps beneath the gasket and improve the overall consistency of the door-bottom seal.
No. The NOR615 is a threshold plate and does not contain a flexible sealing gasket.
It should be used with a suitable automatic drop seal, door-bottom seal or other compatible threshold-sealing component.
The correct combination will depend on:
Yes. The NOR615 is designed to complement Norseal automatic drop seals by providing a level surface beneath the door.
The gap beneath a door can be a significant sound-leakage path. A correctly installed threshold plate can help the drop-seal gasket close this gap more consistently than it would against carpet, uneven tiles or interrupted floor finishes.
However, the NOR615 does not have a standalone decibel or acoustic rating.
Any quoted sound-reduction performance applies to the complete tested door assembly, including:
Installing the NOR615 beneath an existing door will not independently give the door a particular Rw or decibel rating.
A drop-seal gasket may not make reliable contact when it closes directly onto a soft or uneven floor.
Potential problems include:
The NOR615 provides a durable aluminium surface across the doorway, helping the gasket maintain more uniform contact.
Norseal states that its low-profile threshold plates are suitable for application over solid floors and alongside carpeted floor finishes.
When fitting the NOR615 against carpet, the threshold must be secured to a stable substrate rather than relying on the carpet to support the plate.
Loose, thick or compressible carpet should be properly finished around the threshold so that the aluminium plate remains firmly supported.
Norseal states that the NOR615 complies with Approved Document M.
Its low 4.9mm profile provides a gradual transition across the doorway and is suitable for wheeled traffic.
Final accessibility compliance still depends on the complete doorway, including:
The product should therefore be installed as part of a correctly designed accessible doorway rather than relying on the threshold plate alone to establish compliance.
The NOR615 is suitable for use at the threshold of doorsets in residential, commercial and public buildings.
Typical applications can include:
Yes. The NOR615 is suitable for use beneath Norseal automatic drop seals such as the NOR810, provided the dimensions and doorset specification are compatible.
The NOR810 closes the gap beneath the door, while the NOR615 provides the firm threshold surface against which its silicone gasket seals.
The drop seal must be adjusted after the threshold plate has been installed so that the gasket makes light and continuous contact without excessive compression.
Measure the doorway between the jambs before selecting a length.
Also check:
The NOR615 should be treated as one component within a complete door-sealing arrangement. It does not independently soundproof, smoke-seal or fire-rate a doorway.
Norseal NOR615 is a low-profile aluminium threshold plate measuring 40mm wide and 4.9mm high. It is designed to provide a smooth and even surface beneath automatic drop seals and other compatible door-bottom sealing systems.
| Product Name | Norseal NOR615 Door Threshold Plate |
| Brand | Norsound by Norseal |
| Product Reference | NOR615 |
| Product Type | Low-profile aluminium threshold plate |
| Application | At the threshold of doorsets |
| Width | 40mm |
| Overall Height | 4.9mm |
| Material | 6060-T6 aluminium |
| Standard Finish | AA10 satin-silver anodised finish |
| Colour | Satin Silver |
| Standard Lengths | 1000mm and 2100mm |
| Fixing Options | Bonded using suitable adhesive or mechanically screw-fixed |
| Adhesive | Not supplied |
| Fixing-Kit Variants | Versions ordered with an /FX suffix are supplied with fixings |
| Screw-Hole Diameter | 4mm holes specified in the current fitting instructions |
| Fixing-Hole Spacing | Approximately 200mm centres |
| Concrete-Floor Drilling | 6mm masonry holes for suitable plugs |
| Adhesive Channel | Integral underside channel for a continuous adhesive bead |
| Accessibility Performance | Norseal states compliance with Approved Document M |
| Floor Types | Suitable for use within solid-floor and carpeted-floor arrangements |
| Wheeled Traffic | Suitable due to the low-profile curved design |
| Main Function | Provides an even surface against which a door-bottom gasket can seal |
| Drop-Seal Compatibility | Designed to complement Norseal automatic drop seals and other compatible door-bottom seals |
| Standalone Acoustic Rating | None stated — acoustic performance depends on the complete tested doorset and sealing arrangement |
| Standalone Smoke Rating | None stated — smoke performance depends on the associated seals and complete doorset |
| Standalone Fire Rating | None stated — the NOR615 is a threshold plate rather than an intumescent fire seal |
| Complete Door-Bottom Seal? | No — a suitable automatic drop seal or threshold gasket is required |
| Option | Length | Fixings | Order Code |
|---|---|---|---|
| NOR615 Plate | 1000mm | Plate only | NOR615-1000 |
| NOR615 with Fixings | 1000mm | Fixing kit included | NOR615-1000/FX |
| NOR615 Plate | 2100mm | Plate only | NOR615-2100 |
| NOR615 with Fixings | 2100mm | Fixing kit included | NOR615-2100/FX |
The NOR615 can be used beneath:
The NOR615 provides a firm surface beneath a compatible automatic drop seal.
The selected seal must be suitable for:
After the NOR615 has been fitted, the automatic seal should be readjusted so that its gasket makes light and continuous contact across the threshold.
A firm threshold surface can improve acoustic sealing by helping a door-bottom gasket maintain consistent contact.
The NOR615 does not have a standalone Rw or decibel rating.
Final sound reduction depends on:
Do not advertise the NOR615 as independently achieving a particular acoustic rating.
Norseal states that the NOR615 complies with Approved Document M.
The threshold plate’s low profile can support accessible doorway design, but the compliance of the complete doorway depends on factors beyond the threshold plate itself.
These can include:
Check the complete installed doorway against the current project specification and applicable building requirements.
The NOR615 is an aluminium threshold plate and is not an intumescent fire seal.
Where it is proposed for use beneath a fire-resisting or smoke-control door:
Store the NOR615:
Support the profile properly while cutting and remove all sharp burrs before installation.
Norseal NOR615 Door Threshold Plate can be installed at the threshold of a doorset using suitable screw fixings or construction adhesive.
The threshold should be measured and cut to fit between the door jambs, positioned beneath the door-bottom gasket and fixed securely without preventing the door from opening, closing or latching correctly.
Always follow the current Norseal fitting instructions and any project-specific doorset requirements.
Inspect the door, frame, floor and associated door-bottom seal.
Check that:
Measure the door clearance at several points across the opening and through the complete swing path.
Measure the width between the two door jambs at the position where the NOR615 will be fitted.
Record the measurement as L.
Measure at floor level rather than assuming that the width is identical higher up the frame.
Where the threshold must fit around door stops or irregular frame details, measure these areas separately.
Transfer measurement L onto the NOR615 threshold plate.
Use a pencil or suitable marker to indicate:
Check the measurement before cutting.
Machine-cut the aluminium threshold plate to the required length using a suitable saw.
Support the profile properly while cutting to prevent vibration, movement or bending.
After cutting:
Place the NOR615 in its intended position beneath the door.
Check that:
Carefully open and close the door while the unsecured threshold is safely held in position.
The NOR615 may be installed using:
Select a method suitable for the floor construction, site conditions and doorset specification.
Screw fixing provides a mechanical connection but requires the floor to be drilled.
Adhesive bonding avoids visible screws but requires a clean, stable substrate and an adhesive compatible with both aluminium and the floor material.
Where screw fixing is required, mark fixing positions along the length of the threshold.
Norseal’s current fitting instructions specify that the fixing holes should be positioned approximately 200mm apart.
Distribute the holes evenly so that the threshold will be held securely along its complete length.
Drill the marked fixing holes through the aluminium using a 4mm drill bit.
Countersink every hole so that the finished screw heads can sit completely flush with the surface of the threshold plate.
Raised screw heads could:
Remove all drilling swarf and sharp edges.
Place the drilled threshold plate back into its final position.
Use the drilled holes as a guide to mark the fixing centres onto the floor.
Check the threshold position and gasket alignment before removing it for floor drilling.
Where fixing into a suitable concrete floor, Norseal specifies drilling the marked positions using a 6mm masonry drill bit.
Before drilling, confirm that:
Remove all drilling dust before inserting the plugs.
For timber, tile, screed or other substrates, use fixings specifically selected for that material.
Return the NOR615 to its final position and secure it using suitable screws and plugs.
Tighten the screws evenly along the plate.
Make sure each screw head sits completely flush within its countersunk hole.
Do not overtighten the screws, as this could:
The finished plate should be secure, fully supported and free from movement.
Where adhesive bonding is required, prepare the floor and underside of the threshold according to the adhesive manufacturer’s instructions.
The contact surfaces should normally be:
Do not bond the threshold directly onto loose carpet, unstable flooring or contaminated surfaces.
Run a continuous bead of suitable adhesive along the full length of the channel on the underside of the NOR615.
Use enough adhesive to secure and support the plate without allowing excessive material to spread beyond its edges.
The adhesive is not supplied with the standard NOR615 threshold plate.
Place the NOR615 carefully into its final position.
Press it firmly and evenly against the floor.
Check immediately that:
Correct the position before the adhesive begins to set.
Allow the adhesive to dry and cure in accordance with its manufacturer’s instructions.
Do not allow foot or wheeled traffic across the threshold until the adhesive has developed sufficient strength.
Curing time will depend on:
Once the threshold plate is securely fixed, adjust the associated automatic drop seal according to its own fitting instructions.
The flexible gasket should make light and continuous contact across the NOR615 when the door closes.
Check for:
Do not over-adjust the drop seal. Excessive compression can increase door-operating forces and cause unnecessary wear to the gasket and mechanism.
Open and close the door several times.
Confirm that:
The threshold plate must not impede the opening or closing of the door.
Inspect the NOR615 periodically as part of the door’s normal maintenance programme.
Check for:
Clean the threshold with a soft cloth and a suitable mild cleaning product.
Avoid abrasive pads, wire brushes and aggressive chemicals that could damage the satin-silver anodised finish.
Remove dust and debris from the sealing surface so the door-bottom gasket can continue to make consistent contact.
The NOR615 is a supporting threshold component. It does not provide complete acoustic, smoke or fire containment by itself.
Final performance depends on:
Where the door forms part of a certified acoustic, smoke or fire-resisting assembly, install only the threshold and sealing arrangement permitted by the relevant test evidence, assessment or doorset certification.
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