Norsound NOR615 Threshold Plate – 40 × 4.9mm is a low-profile aluminium plate designed for installation at the threshold of a suitable doorset.
The plate creates a firm, smooth and consistent surface beneath the door. This allows an automatic drop seal or other compatible door-bottom gasket to make more reliable contact when the door closes.
It can also bridge the junction between adjoining floor finishes, helping create a neater transition across the doorway.
The NOR615 is available in:
Both stocked versions have a Satin Silver aluminium finish and are supplied with mechanical fixings.
A threshold plate is a rigid profile installed across the floor beneath a door.
Its main purpose is to provide a suitable contact surface for a door-bottom seal.
Without a threshold plate, an automatic drop seal may need to close against:
These conditions can leave localised gaps beneath the gasket.
The NOR615 provides a continuous aluminium surface against which the door-bottom seal can close.
The NOR615 can be used beneath compatible automatic drop seals, including suitable products from the Norsound range.
An automatic drop seal lowers a flexible gasket as the door closes. The gasket must make continuous contact across the full width of the doorway to achieve its intended performance.
The threshold plate can help by providing:
The drop seal must be adjusted after the plate has been installed.
The NOR615 is a threshold plate rather than a flexible door seal.
It does not independently close the gap beneath the door.
For acoustic, draught or smoke-control applications, it normally needs to be used with a compatible product such as:
The plate provides the contact surface; the flexible gasket provides the seal.
The gap beneath a door is often the largest untreated opening in an otherwise sealed doorset.
Sound can pass readily through this air path.
The NOR615 can support an acoustic door-sealing system by helping the door-bottom gasket maintain continuous threshold contact.
Final acoustic performance depends on the complete assembly, including:
The NOR615 does not have a standalone decibel rating.
Any numerical acoustic rating must apply to the complete tested doorset rather than the aluminium plate alone.
A smooth threshold plate can help a compatible smoke-control drop seal make continuous contact across the bottom of a closed door.
The NOR615 itself is not a flexible smoke seal.
Where smoke control is required, confirm:
Do not assign a standalone smoke classification to the threshold plate.
The NOR615 is manufactured from aluminium and does not contain an intumescent fire-sealing element.
It does not independently provide an FD30, FD60 or other fire-resistance period.
Where it is installed beneath a fire-resisting door:
The NOR615 measures:
Its low profile is designed to create a gradual transition across the doorway while providing sufficient width for the door-bottom gasket to contact.
The 40mm plate may be suitable where:
Wider Norseal threshold profiles are available where a broader transition or contact area is required.
Norseal describes the NOR615 as compliant with the relevant requirements of Approved Document M.
Its low-profile design is intended to support accessible movement through the doorway, including suitable wheeled traffic.
Compliance still depends on the completed installation, including:
The product specification alone does not make an incorrectly installed threshold compliant.
The 4.9mm profile provides a low transition for suitable:
The plate must be firmly supported and securely fixed across its full length.
Loose edges, proud screws or an unsupported plate can create a trip or snagging hazard.
The NOR615 can cover a narrow junction between different floor materials.
Potential applications include transitions between:
The plate should not be used to span a large unsupported void.
Any underlying gap must be suitable for the plate and fixing method.
The threshold plate is manufactured from aluminium.
The material provides:
The plate should be supported by the underlying floor rather than being expected to carry loads across an unsupported gap.
The NOR615 has a Satin Silver aluminium appearance.
The manufacturer identifies the finish as:
AA10
This provides a clean neutral finish suitable for a wide range of:
Cut edges should be deburred carefully so that no sharp aluminium remains exposed.
The NOR615 can be installed using:
The stocked `/FX` versions are supplied with fixings.
Adhesive is not supplied.
Screw fixing provides positive mechanical retention, while adhesive fixing can provide an installation without exposed screw heads where the substrate and project requirements permit it.
The selected fixing method must be compatible with:
The current stocked lengths are:
Select a supplied length that is at least as long as the measured clear distance between the door jambs.
Yes. The aluminium profile can be machine cut to the required doorway width.
The plate should be:
Do not leave sharp or rough cut edges.
Subject to the applicable doorset specification, the NOR615 can provide a contact surface for suitable products such as:
The selected gasket must land fully on the 40mm-wide plate when the door is closed.
The NOR615 can be used within suitable doorsets in:
Before ordering, confirm:
The NOR615 should not be used to span a large unsupported floor gap or to compensate for a badly misaligned door.
Norsound NOR615 Threshold Plate is a low-profile Satin Silver aluminium plate for installation beneath suitable doorsets.
| Product Name | Norsound NOR615 Threshold Plate – 40 × 4.9mm |
| Brand | Norsound by Norseal |
| Manufacturer Product Reference | NOR615 |
| Supplier Product Reference | NOR6/15 |
| Product Type | Low-profile aluminium doorset threshold plate |
| Application | At the threshold of suitable doorsets |
| Primary Function | Provides an even contact surface for a compatible door-bottom seal |
| Secondary Function | Covers a suitable transition between adjoining floor finishes |
| Width | 40mm |
| Overall Height | 4.9mm |
| Profile Size | 40 × 4.9mm |
| Material | Aluminium |
| Colour | Satin Silver |
| Finish | AA10 finish |
| Available Lengths | 1000mm and 2100mm |
| Fixing Methods | Adhesive bonded or mechanically screw-fixed |
| Adhesive Supplied? | No |
| Fixings Supplied with Current Stocked Versions? | Yes — both stocked product codes carry the /FX suffix |
| Accessibility | Described by Norseal as compliant with Approved Document M |
| Suitable Traffic | Pedestrian and suitable wheeled traffic when correctly supported and installed |
| Automatic Drop Seal Included? | No |
| Flexible Gasket Included? | No |
| Standalone Acoustic Rating? | No — acoustic performance depends on the complete doorset and compatible door-bottom seal |
| Standalone Smoke Classification? | No — the threshold plate does not independently create a smoke seal |
| Standalone Fire Rating? | No — the plate does not independently provide a fire-resistance period |
| Intumescent Material | No |
| Length | Profile Size | Finish | Fixings | Product Code |
|---|---|---|---|---|
| 1000mm | 40 × 4.9mm | Satin Silver | Included | NOR6/15/1000/FX |
| 2100mm | 40 × 4.9mm | Satin Silver | Included | NOR6/15/2100/FX |
Norseal’s manufacturer literature uses the following general format:
The current supplied range uses the alternative stock-code format:
Both stock codes refer to the NOR615 40 × 4.9mm profile.
| Profile Size | Length Options | Finish Options | Total Combinations |
|---|---|---|---|
| 40 × 4.9mm | 1000mm and 2100mm | Satin Silver | 2 |
Select the supplied length according to the clear distance between the door jambs.
The 1000mm version is generally suitable for:
The 2100mm version is generally suitable for:
The supplied plate must be long enough to span the required threshold before cutting.
The selected door-bottom gasket should land fully on the plate when the door closes.
Before installation, check:
A 40mm-wide threshold may not suit every door-bottom gasket or floor transition.
The NOR615 can support acoustic performance by providing a continuous contact surface for the door-bottom seal.
It must not be assigned a standalone sound-reduction value.
Final acoustic performance depends on:
The aluminium plate itself does not form a flexible smoke seal.
Where smoke control is required:
The NOR615 is not an intumescent product and does not independently provide fire resistance.
Before installation beneath a fire door:
Norseal identifies the NOR615 as compliant with Approved Document M.
The final doorway should nevertheless be assessed for:
The fixing method must be appropriate for the underlying surface.
Potential substrates include:
Check for underfloor heating, electrical cables, pipework and other concealed services before drilling.
Store the NOR615:
Inspect the installed threshold periodically.
Check for:
Keep the plate clean so that the door-bottom gasket can make continuous contact.
Norsound NOR615 Threshold Plate can be mechanically screw-fixed or bonded using a suitable adhesive.
The plate must be cut to the clear distance between the door jambs and positioned so that the compatible door-bottom gasket lands fully on its upper surface.
Inspect the doorway, door and floor.
Confirm that:
Complete the final adjustment of the automatic drop seal only after the threshold plate has been fixed.
Measure the clear distance between the two door jambs at floor level.
Record this dimension as L.
Measure at the exact position where the threshold plate will be installed.
Do not assume that the opening is perfectly square or the same width at a higher point.
Close the door and identify where the automatic drop-seal gasket will land.
The threshold plate should be positioned so that:
Mark the intended plate position on the floor.
Place the NOR615 on a stable work surface.
Measure dimension L along the aluminium plate and mark the cutting line.
Use a square to ensure that the line is perpendicular to the length of the profile.
Check the measurement again before cutting.
Machine cut the aluminium plate to the required length using a suitable saw.
Support the profile firmly during cutting.
Use controlled cutting pressure to avoid:
Wear suitable eye and hearing protection.
Use a file or deburring tool to remove:
Clean the plate thoroughly after cutting.
No sharp aluminium should remain exposed at either jamb.
Place the cut threshold plate between the jambs.
Check that:
Correct the length or position before drilling or applying adhesive.
The NOR615 can be installed using:
Select the method required by:
The stocked `/FX` versions include mechanical fixings.
Adhesive is not supplied.
For screw fixing, mark fixing positions along the plate at approximately:
200mm centres
Keep the end holes suitably clear of the cut edges.
The hole spacing should provide firm and even retention across the complete plate.
Using a 4mm drill bit, drill the marked holes through the threshold plate.
Support the plate on a suitable backing surface while drilling.
Remove all metal swarf after each hole.
Countersink each fixing hole so that the supplied screw heads can finish flush with the upper face of the threshold.
Do not countersink so deeply that:
Trial fit one screw where necessary to confirm the correct countersink depth.
Return the drilled plate to its final position.
Mark the floor through each fixing hole.
Keep the plate aligned while marking.
Remove the plate after all floor positions have been transferred.
Before drilling the floor, confirm that the fixing positions will not damage:
Use an alternative approved fixing method where safe drilling cannot be confirmed.
Where the plate is being fixed to concrete, use a:
6mm masonry drill bit
Drill the marked positions to the depth required by the supplied plugs.
Keep the drill perpendicular to the floor.
Remove all dust from the drilled holes.
For timber or another substrate, use the drill and fixing method appropriate to that material.
Insert the supplied plugs into the prepared concrete holes.
The plugs should finish flush with the floor surface.
Do not leave a plug projecting above the floor, as it can prevent the threshold plate sitting flat.
Place the NOR615 in its final marked position.
Insert the supplied screws through the countersunk holes and tighten them progressively.
Work from one end towards the other while maintaining alignment.
The screws must finish:
Flush with the upper surface of the threshold plate
Do not leave proud screw heads.
Tighten each screw sufficiently to secure the plate without distorting it.
Overtightening can:
Check that the plate remains flat after all fixings have been installed.
Select an adhesive suitable for:
Follow the adhesive manufacturer’s instructions concerning:
The floor beneath the plate must be:
Clean the underside of the aluminium where required by the adhesive manufacturer.
Turn the NOR615 over and locate the adhesive channel on its underside.
Run a continuous bead of suitable adhesive along the complete length of this channel.
Avoid:
Place the threshold plate onto the prepared floor in its marked position.
Press it down evenly along the complete length.
Check that:
Allow the adhesive to dry or cure fully before subjecting the threshold to:
Use temporary restraint where required by the adhesive manufacturer.
After the chosen fixing method is complete, inspect the plate.
Confirm that:
Close the door and observe the door-bottom gasket.
Adjust the drop seal so that the gasket:
The threshold plate itself has no adjustment mechanism.
Operate the door several times.
Confirm that:
Inspect the NOR615 regularly.
Check for:
Clean the plate using a soft cloth and a mild product suitable for finished aluminium.
Avoid:
Correct measuring, cutting, fixing and drop-seal adjustment are essential.
The NOR615 does not independently create an acoustically rated, smoke-control or fire-resisting door.
Final performance depends on:
For certified or performance-rated doorsets, install the NOR615 only in accordance with the applicable test evidence, assessment and door-manufacturer instructions.
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