Norsound NOR711 Acoustic Perimeter Seal – 11 × 5mm × 2100mm is a kerf-fit and self-adhesive door-frame seal designed to reduce sound, cold smoke, draughts and uncontrolled airflow through the gaps around a closed door.
The profile is designed for installation around the head and jambs of suitable acoustic and smoke-control doorsets.
Its semi-rigid mounting section is retained within a prepared kerf in the door stop, while the integral self-adhesive backing provides additional fixing security.
Two flexible blades project from the profile and are compressed between the face of the closed door and the door stop.
This compression action helps create continuous sealing contact around the three sides of the door opening.
Each seal is supplied in a fixed 2100mm length and is available in:
The current supplied product range identifies this seal using the reference NOR711 and the nominal dimensions 11 × 5mm.
Norseal’s published technical information identifies the corresponding profile as NOR710STOP or NOR710ST.
The manufacturer’s dimensional information describes the profile as approximately:
The 11 × 5mm description used within this product range should therefore be treated as the supplier’s nominal size description.
The seal is designed to treat the operating gaps around:
It can help restrict:
The threshold beneath the door must be treated separately where acoustic or smoke containment is required.
The profile contains two flexible sealing blades.
When the door closes, the blades are compressed between the door-leaf face and the door stop.
This creates two flexible points of contact rather than leaving an open air path around the perimeter.
The compression arrangement differs from a swiping seal, where the edge of the door passes across and bends the sealing blades sideways.
The stop-mounted NOR711 arrangement is designed so that the door closes directly against the blades.
Correct compression can help:
The blades should compress sufficiently to create contact but must not be completely crushed.
The NOR711 combines two fixing methods:
The kerf provides mechanical support and helps maintain the position of the profile during repeated door operation.
The adhesive backing helps secure the profile along its length and reduce movement within the groove.
The fixing surface must be:
The profile is designed for stop-mounted compression.
It should be installed so that:
The precise position should be established by trial fitting before machining and installing all three sides.
The corresponding Norsound profile has been acoustically tested in accordance with:
BS EN ISO 10140-2
The two flexible blades help reduce sound transmission by closing the direct air path between the door leaf and frame.
The seal does not have a universal standalone decibel rating.
Final sound reduction depends on the complete doorset, including:
Any stated acoustic figure must be attributed to the complete tested door assembly rather than to one length of perimeter seal.
The corresponding Norsound profile has been smoke tested in accordance with:
BS 476-31.1
When correctly installed, the flexible blades help restrict cold smoke passing through the operating gap around the door head and jambs.
Effective smoke control also depends on:
Cold-smoke performance is not the same as fire resistance.
The NOR711 is an acoustic and cold-smoke perimeter seal.
It does not contain an intumescent fire-sealing element and must not replace any intumescent strip required by a fire-door specification.
Where it is used on a fire-resisting doorset:
The seal does not independently provide an FD30, FD60 or other fire-resistance period.
The corresponding Norsound profile has been tested to:
1,000,000 operating cycles
This makes it suitable for frequently used doors in environments such as:
Cycle testing does not remove the need for routine inspection and replacement where the blades become damaged or permanently deformed.
The seal is manufactured from flexible and rigid PVC components.
The semi-rigid section provides:
The flexible blades provide:
The profile uses two flexible blades rather than one.
When compressed correctly, the blades form separated contact zones between the door and stop.
This can provide improved sealing compared with an untreated gap while maintaining relatively low operating resistance.
The two blades must remain:
The NOR711 may be used around suitable:
Meeting-stile sealing on double doors must be treated using the profile and arrangement specified by the doorset evidence.
This product is available in:
Grey is not included within this product range.
Colour changes the visible appearance but does not alter the nominal dimensions or intended function.
Each seal is supplied as one:
2100mm length
The profile can be cut to suit the head and jamb dimensions.
A typical single-leaf doorset normally requires separate sections for:
The number of lengths required depends on the height and width of the opening.
Measure all three sections before calculating the required quantity.
The NOR711 does not seal beneath the door.
It can be combined with a suitable door-bottom product such as:
The complete combination must be compatible with the acoustic, smoke or fire doorset evidence.
The NOR711 arrangement differs from the standard NOR710.
| Feature | NOR711 / NOR710STOP Profile | NOR710 |
|---|---|---|
| Nominal profile | 11 × 5mm supplier description | 10 × 10.2mm |
| Fixing | Kerf-fit and self-adhesive | Self-adhesive surface fixing |
| Installation position | Within the door stop | Surface mounted to frame or stop |
| Blade action | Compression against the door face | Flexible perimeter contact |
The profiles should not be substituted without checking the intended frame detail and doorset evidence.
The NOR720 is a smaller TPE kerf-fit profile commonly used around smoke-control doors or at acoustic meeting stiles.
The NOR711 uses flexible and rigid PVC, incorporates two compression blades and includes both kerf retention and self-adhesive fixing.
Use the exact profile specified for the doorset rather than choosing solely by colour or length.
Before ordering, confirm:
Do not use the seal to compensate for a warped door, loose hinges, a damaged stop or excessive and inconsistent perimeter gaps.
Norsound NOR711 Acoustic Perimeter Seal is a kerf-fit and self-adhesive dual-blade PVC profile for suitable acoustic and cold-smoke door-perimeter applications.
| Product Name | Norsound NOR711 Acoustic Perimeter Seal – 11 × 5mm × 2100mm |
| Brand | Norsound by Norseal |
| Supplier Product Reference | NOR711 |
| Corresponding Manufacturer Profile | NOR710STOP / NOR710ST |
| Product Type | Kerf-fit and self-adhesive acoustic and cold-smoke perimeter seal |
| Application | Around the head and jambs of suitable acoustic and smoke-control doorsets |
| Primary Functions | Acoustic, cold-smoke, draught and airflow sealing |
| Supplier Nominal Size | 11 × 5mm |
| Manufacturer Drawing Dimensions | Approximately 11mm overall width × 4.2mm blade projection |
| Standard Length | 2100mm |
| Available Colours | Black, Brown and White |
| Grey Available? | No — Grey is not included within the supplied NOR711 range |
| Material | Flexible and rigid PVC |
| Number of Flexible Blades | Two |
| Blade Action | Compression between the door-leaf face and door stop |
| Fixing Method | Kerf-fit and integral self-adhesive backing |
| Installation Position | Within a prepared groove in the door stop |
| Acoustic Test Standard | BS EN ISO 10140-2 |
| Smoke Test Standard | BS 476-31.1 |
| Durability | Tested to 1,000,000 operating cycles |
| Intumescent Fire Seal | No — this product does not replace any required intumescent strip |
| Standalone Acoustic Rating? | No — acoustic performance depends on the complete tested doorset |
| Standalone Fire Rating? | No — the seal does not independently provide a fire-resistance period |
| Colour | Supplier Nominal Size | Length | Product Code |
|---|---|---|---|
| Black | 11 × 5mm | 2100mm | NOR711/2100/BLK |
| Brown | 11 × 5mm | 2100mm | NOR711/2100/BRN |
| White | 11 × 5mm | 2100mm | NOR711/2100/WHT |
The corresponding Norsound profile has previously been documented using the following manufacturer codes:
| Colour | Current Supplied Code | Legacy Manufacturer Reference |
|---|---|---|
| Black | NOR711/2100/BLK | NOR710ST-2100/BLK |
| Brown | NOR711/2100/BRN | NOR710ST-2100/BRN |
| White | NOR711/2100/WHT | NOR710ST-2100/WHT |
Confirm current compatibility before using the legacy reference for procurement or specification purposes.
A standard single-leaf door normally requires separate seal sections for:
A 2100mm length will typically cover one full-height jamb.
Additional material will normally be required for the opposite jamb and head.
The exact quantity depends on:
Measure the complete opening before calculating the quantity.
The corresponding manufacturer profile combines:
The kerf dimensions should be confirmed against:
Do not machine every door stop until the seal has been trial fitted successfully.
The NOR711 should be positioned so the flexible blades are compressed between the door face and stop.
The blades should:
Excessive compression can increase closing resistance and permanently deform the blades.
Insufficient compression can leave an air and smoke leakage path.
The corresponding profile has been acoustically tested in accordance with BS EN ISO 10140-2.
No universal standalone decibel rating should be assigned to one seal length.
Final sound reduction depends on:
The corresponding profile has been smoke tested in accordance with BS 476-31.1.
Effective cold-smoke sealing requires:
The profile should not be treated as the only smoke-control component within a complete doorset.
The NOR711 is an environmental acoustic and smoke seal rather than an intumescent fire seal.
Where it is installed on a fire-resisting doorset:
The adhesive contact surface must be:
Poor surface preparation may cause the adhesive section to lift from the stop.
Store the NOR711:
Inspect the installed seals regularly.
Replace the specified profile where it is:
Do not replace the NOR711 with a differently sized or differently mounted seal without confirming compatibility with the doorset specification.
Norsound NOR711 Acoustic Perimeter Seal is installed into a prepared kerf within the door stop.
The self-adhesive mounting surface provides additional retention, while the two flexible blades are compressed between the closed door-leaf face and the stop.
The profile should be trial fitted before all three stop sections are machined.
Inspect the complete door and frame.
Confirm that:
Correct substantial alignment, gap or door-operation defects before installing the seal.
Close the door and identify where the door-leaf face meets the stop.
The seal must be positioned so that the two flexible blades are compressed between:
The blades should not be positioned for a sideways swiping action unless the applicable doorset evidence specifically requires a different arrangement.
Mark the intended seal position along both jambs and the head.
Hold a short sample of the profile against the proposed position.
Close the door slowly and inspect the blades.
The sample should demonstrate:
Adjust the proposed position before machining if the compression is unsuitable.
Use the physical mounting section as the reference for the kerf.
The groove should:
Do not assume the kerf dimensions solely from the product’s nominal 11 × 5mm description.
Test the proposed saw or router setting on a suitable timber offcut before machining the installed door stop.
Confirm whether the door stop is:
A loose, split or inadequately fixed planted stop must be repaired or replaced before installation.
Use a straight edge to mark a continuous groove line along:
The marked lines should maintain the same relative position around all three sides.
Check the lines with the door closed before machining.
Open and secure the door so it cannot move during machining.
Protect:
Remove the door where necessary to achieve safe and accurate access.
Before machining the complete stop, cut a short trial section in a non-critical or representative area.
Check that:
Adjust the tool setting where required.
Machine the prepared groove along the full length of each vertical stop.
Maintain:
Work carefully around hinge and latch positions.
Do not machine into structural fixings or required fire-door components.
Machine the corresponding groove across the head stop.
Ensure the head kerf meets both jamb grooves accurately.
The profile positions should allow the head and jamb pieces to form closely fitted corner joints.
Remove all machining dust, chips and loose fibres.
Use a brush, vacuum and clean cloth as required.
The groove and adhesive contact area must be:
Allow any cleaning product to dry fully.
Measure the first jamb from the head joint down to the required finishing point.
Transfer the measurement onto the NOR711 without stretching the profile.
Allow for the intended corner-joint arrangement.
Cut the profile cleanly using a sharp knife or another suitable cutting tool.
Support the rigid mounting section during cutting.
Avoid:
Use an appropriate mitred or accurately butted joint according to the frame detail.
Insert the mounting section into the groove without fully exposing the adhesive.
Check that:
Close the door carefully and confirm the blade compression.
Remove the trial-fitted profile carefully.
Peel back a short section of the adhesive release liner.
Do not remove the complete liner at once.
Progressive removal helps:
Starting at the upper end, insert the mounting section into the kerf and press the adhesive face firmly against the prepared stop.
Work downwards while progressively removing the release liner.
Apply even pressure along the complete profile.
Do not:
Repeat the same process on the second jamb.
Maintain:
Check that neither profile interferes with the hinges or latch.
Measure the distance between the installed jamb profiles.
Cut the head section accurately.
Dry fit it before exposing the adhesive.
Install the head seal into the prepared kerf and press the adhesive face firmly against the stop.
The ends should meet the jamb pieces without large open gaps.
Inspect both head-to-jamb joints.
The joints should:
Re-cut inaccurate sections rather than forcing them together.
Press along the complete adhesive mounting surface of all three profiles.
Pay particular attention to:
Confirm that no section is lifting from the stop.
Close the door carefully and observe the two flexible blades.
They should:
Stop and correct any profile that folds or becomes trapped.
Open and close the door several times.
Confirm that:
Adjust the door or seal position where the door no longer closes correctly.
The NOR711 treats only the head and jambs.
Where acoustic or smoke containment is required, confirm that the threshold is treated using an appropriate:
The lower ends of the jamb seals should meet the threshold-sealing zone without leaving open corner gaps.
Inspect the NOR711 regularly as part of the doorset-maintenance programme.
Check for:
Clean the profile using a soft cloth and a mild cleaning product suitable for PVC.
Avoid:
Replace damaged sections using the same specified product and colour.
Correct kerf preparation, surface cleaning, profile alignment and blade compression are essential to the performance of the NOR711.
The seal does not independently create an acoustically rated, smoke-control or fire-resisting door.
Final performance depends on:
For certified doorsets, install the seal only in accordance with the applicable test evidence, assessment and door-manufacturer instructions.
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