Lorient LAS7001 si Perimeter Seal is a slimline, face-fixed door seal designed to improve acoustic and smoke containment around the head and jambs of single swing doors.
The seal combines an aluminium carrier with a flexible silicone rubber gasket. It is fixed directly onto the existing door stops, allowing the gasket to compress against the face of the closed door and reduce open gaps around the frame.
A decorative PVC cover strip conceals the fixing screws after installation, creating a neat and unobtrusive finish. The LAS7001 si can normally be installed without removing the door from its hinges, making it suitable for both new installations and upgrades to existing doors.
The LAS7001 si is used to seal the gaps around the top and sides of a single swing door.
Gaps between the door leaf and frame can allow sound, smoke, draughts, weather and light to pass between adjoining spaces. Installing a correctly adjusted perimeter seal helps create more consistent contact around the closed door.
It is commonly used for:
The LAS7001 si contains a flexible silicone rubber gasket held within a slim aluminium carrier.
When the door closes, the silicone gasket compresses against the face of the door. This helps close the gap between the door and its stops, reducing the open pathways through which sound, smoke, air and light can travel.
The fixing holes in the aluminium carrier are pre-drilled and slotted. This allows the position of the seal to be adjusted during installation so that the gasket makes firm and consistent contact without preventing the door from closing or latching correctly.
The LAS7001 si has been acoustically tested to BS EN ISO 10140-2:2010, with Lorient stating performance of up to Rw 33dB.
The quoted performance applies to the relevant tested door assembly and sealing arrangement. It should not be treated as a standalone 33dB rating for the perimeter seal itself.
Final acoustic performance will depend on:
The gap beneath the door must also be treated with a suitable threshold or drop seal to create an effective acoustic sealing system.
The LAS7001 si has been tested to BS EN 1634-3:2004 at ambient and medium temperatures.
Lorient states that the product provides an effective smoke seal up to 200°C and meets the smoke requirements referenced in BS 9999:2017.
Smoke performance depends on the complete door assembly, including the perimeter seals, threshold treatment, door construction and installation quality.
The LAS7001 si is not an intumescent fire seal and should not be treated as a replacement for any required intumescent strips or other fire-door components.
The LAS7001 si is designed for face-fixed installation onto the existing stops at the:
It is intended for single swing doors. The head and jamb lengths are cut and mitred at the upper corners to create a continuous and neat perimeter arrangement.
The LAS7001 si can be used in a wide range of residential, commercial and public buildings, including:
A face-fixed seal can be installed directly onto the existing door stops without machining a groove into the door leaf or frame.
This makes the LAS7001 si particularly useful for retrofit projects where improved sealing is required with relatively little disruption.
The door does not normally need to be removed from its hinges during installation.
Both products are face-fixed Lorient perimeter seals, but they use different gasket profiles.
The LAS7001 si uses a rounded silicone compression gasket and is designed primarily for acoustic and smoke containment around correctly aligned single swing doors.
The LAS7003 si uses a larger flexible compression profile designed to accommodate greater variation in the distance between the door face and the stop. It can therefore be useful where a door is slightly warped, unevenly hung or has inconsistent perimeter gaps.
The correct product should be selected according to the door condition, gap arrangement and required tested performance.
The LAS7001 si seals the head and jambs of the door only. The gap beneath the door must be treated separately.
Lorient recommends combining the LAS7001 si with either:
Lorient also states that the LAS7001 si can be used with practically any suitable threshold seal.
The correct door-bottom product will depend on the door material, available clearance, floor finish and required acoustic, smoke or weather performance.
Measure the height and width of the door stops before ordering.
Standard individual lengths are available in 1m and 2.1m sizes. A standard single doorset pack contains:
The seal should make firm and consistent contact with the closed door without creating excessive closing resistance or preventing the latch from engaging.
For acoustic applications, inspect the complete door assembly. Sound may also pass through:
Lorient LAS7001 si is a medium-duty, face-fixed aluminium perimeter seal with a flexible silicone rubber gasket. It is installed onto the existing head and jamb stops of single swing doors.
| Product Name | Lorient LAS7001 si Perimeter Seal |
| Manufacturer | Lorient |
| Product Reference | LAS7001 si |
| Product Type | Face-fixed compression perimeter seal |
| Duty Classification | Medium duty |
| Application | Sealing the head and jambs of single swing doors |
| Installation Position | Face-fixed to the existing door stops |
| Approximate Profile Width | 27mm |
| Approximate Profile Depth | 6mm |
| Carrier Material | Aluminium |
| Seal Material | Flexible silicone rubber |
| Cover Strip | PVC decorative cover strip supplied to conceal the fixing screws |
| Operating Method | The silicone gasket compresses against the door face when the door closes |
| Standard Lengths | 1m and 2.1m |
| Single Doorset Pack | 1 x 1m head length and 2 x 2.1m jamb lengths |
| Special Lengths | Other lengths may be available to special order |
| Standard Finish | Silver anodised aluminium with grey cover strip and grey silicone rubber gasket |
| Bronze Finish | Bronze anodised aluminium with black cover strip and black silicone rubber gasket |
| Other Finishes | Powder-coated carrier finishes may be available subject to minimum order quantities, non-standard charges and additional lead times |
| Fixings for Timber | Self-tapping wood screws supplied |
| Fixings for Metal | Self-drilling and self-tapping screws available on request |
| Fixing Holes | Pre-drilled and slotted to allow accurate positioning and adjustment |
| Acoustic Test Standard | BS EN ISO 10140-2:2010 |
| Acoustic Test Evidence | Up to Rw 33dB within the relevant tested door assembly |
| Smoke Test Standard | BS EN 1634-3:2004 at ambient and medium temperatures |
| Maximum Stated Smoke-Sealing Temperature | Effective smoke seal up to 200°C |
| BS 9999 Requirement | Lorient states that the seal meets the smoke requirement referenced in BS 9999:2017 |
| Durability | Tested to 100,000 operating cycles |
| Containment Characteristics | Protects against sound, smoke, weather, draught and light as part of a suitable door assembly |
| Threshold Compatibility | Can be used with practically any suitable threshold seal |
| Recommended Door-Bottom Seals | Lorient LAS8001 si or LAS8004 drop seal |
| Certifire Certification | CF5179 |
| Fire Seal? | No — this is an acoustic and smoke perimeter seal and does not replace any required intumescent fire seal |
| Option | Contents | Typical Use |
|---|---|---|
| LAS7001 si 1m | One 1m perimeter-seal length | Door heads, smaller openings, repairs and custom installations |
| LAS7001 si 2.1m | One 2.1m perimeter-seal length | Standard-height door jambs and custom perimeter arrangements |
| Single Doorset Pack | 1 x 1m length and 2 x 2.1m lengths | One standard single swing door head and two jambs |
| Finish | Carrier | Cover Strip | Silicone Gasket |
|---|---|---|---|
| Silver | Silver anodised aluminium | Grey | Grey |
| Bronze | Bronze anodised aluminium | Black | Black |
| Special Finish | Powder-coated aluminium subject to availability | Confirm when ordering | Confirm when ordering |
The LAS7001 si is designed for the head and jambs of single swing doors.
Suitable applications may include:
Lorient states acoustic test evidence of up to Rw 33dB in accordance with BS EN ISO 10140-2:2010.
This performance applies to the complete tested door assembly and should not be interpreted as a standalone rating for the LAS7001 si.
Installing the perimeter seal onto an existing door does not automatically give that door an Rw 33dB rating.
Final performance will depend on:
The LAS7001 si has been tested to BS EN 1634-3:2004 at ambient and medium temperatures.
Lorient states that the product provides effective smoke sealing up to 200°C and meets the smoke requirement referenced in BS 9999:2017.
The final smoke performance depends on the complete door assembly and specified component arrangement.
The LAS7001 si should not be treated as a replacement for:
The LAS7001 si treats the head and jambs of the door only.
Lorient recommends using it with the LAS8001 si or LAS8004 drop seal, although it can be used with practically any suitable threshold seal.
Where a specific tested acoustic or smoke performance is required, use the component arrangement covered by the relevant test evidence or doorset certification.
Store the LAS7001 si:
Keep the decorative cover strips with their corresponding carrier lengths and avoid twisting or crushing the silicone gasket before installation.
Lorient LAS7001 si Perimeter Seal is face-fixed onto the existing stops at the head and jambs of a single swing door.
The head and jamb lengths should be cut with mitred upper corner joints. The pre-slotted fixing holes allow the position of the seal to be adjusted until firm and consistent gasket contact is achieved.
The door does not normally need to be removed from its hinges.
Always check the current Lorient fitting guide and the requirements of the complete doorset before beginning installation.
Inspect the door and frame before installing the perimeter seal.
Check that:
Correct serious door-alignment, hinge or hardware problems before fitting the seal.
The LAS7001 si can be adjusted to achieve consistent gasket contact, but it should not be used to compensate for a door that is unsafe, severely distorted or unable to close correctly.
Remove the seal from its packaging and measure:
Allow for mitred corner joints where the head length meets the two jamb lengths.
Measure each section individually. Do not assume that both jambs are exactly the same length or that the frame is perfectly square.
Remove the decorative PVC cover strip from each aluminium carrier before cutting or fixing the seal.
Place the cover strips somewhere clean and protected so they do not become scratched, twisted or contaminated.
Keep each cover strip with its corresponding carrier length.
Pull the silicone gasket back from the section of aluminium carrier that needs to be cut.
This prevents the gasket from being damaged by the saw and allows the carrier to be cut accurately.
Do not pull or stretch the gasket excessively.
Cut the aluminium carriers to the measured lengths using a suitable hand saw or power saw.
Allow for mitred joints at the upper corners where the head and jamb sections meet.
Use a suitable mitre box or cutting guide to create clean and accurate corner joints.
Support the carrier during cutting to avoid:
Remove any sharp burrs after cutting.
Measure and cut the decorative cover strips to correspond with the finished aluminium carrier lengths.
Cut the strips carefully so that they fit neatly within the carriers and do not overlap at the mitred corners.
Do not fit the cover strips permanently at this stage.
Slide the silicone gasket back into its correct position within each aluminium carrier.
Cut the gasket to the required finished length using a sharp knife.
Make sure the gasket reaches the ends of each carrier without being stretched, compressed or left short.
The upper corner gaskets should meet neatly when the head and jamb lengths are installed.
Position the cut lengths against the existing door stops at the top and sides of the frame.
Check that:
Use the pre-slotted holes as a guide and mark the pilot-hole positions onto the door stops with a pencil.
Remove or hold back the seal and drill appropriate pilot holes at the marked fixing positions.
Select the pilot-hole size according to:
Take care not to drill into concealed wiring, hardware or other services.
For metal construction, use suitable self-drilling and self-tapping screws. Lorient states that these are available on request.
Position the aluminium carriers back against the door stops.
Lightly secure each length through the pre-slotted holes using the supplied screws.
Do not fully tighten the screws at this stage.
The slotted holes allow the carrier to be moved towards or away from the door face until the correct gasket compression is achieved.
Close the door and check for uniform contact between the silicone gasket and door face.
Lorient recommends placing a sheet of paper between the gasket and the door, then closing the door.
Pull the paper gently.
Resistance should feel firm and reasonably consistent around:
If the paper pulls out too easily, move the carrier slightly towards the door to increase gasket compression.
If the gasket is excessively compressed or prevents the door from closing correctly, move the carrier slightly away from the door.
Repeat the test at several points until consistent contact has been achieved.
Once the position of the seal is correct, open the door and tighten all fixing screws.
Tighten the screws sufficiently to secure the aluminium carrier, but do not overtighten them or distort the profile.
Close the door again after tightening and repeat the paper test to confirm that the adjustment has not moved.
Fit the decorative PVC cover strips into the aluminium carriers to conceal the screws.
Press each strip fully into position along its complete length.
Check that the cover strips are:
If a cover strip later needs to be removed, Lorient advises drilling a small hole at the bottom of the strip and pulling it out with a wire hook or another suitable tool.
Open and close the door several times.
Confirm that:
The installation must not prevent the door from opening, closing or latching correctly.
Lorient recommends combining the LAS7001 si with either:
The LAS7001 si seals the head and jambs, while the drop seal treats the gap beneath the door.
Install and adjust the selected drop seal in accordance with its separate fitting instructions.
The perimeter and threshold seals should create continuous contact without interfering with each other or making the door difficult to operate.
Where the LAS7001 si is being combined with a face-fixed threshold seal, Lorient states that the perimeter seal must be fitted to the door frame first.
Once the head and jamb seals have been installed and adjusted, fit the face-fixed threshold seal according to its separate installation instructions.
Inspect the LAS7001 si periodically as part of the door’s normal inspection and maintenance programme.
Check for:
Clean the seal carefully using a soft cloth and a suitable mild cleaning product.
Avoid abrasive tools or aggressive chemicals that could damage the silicone gasket, aluminium finish or PVC cover strip.
If the door drops on its hinges or its alignment changes, readjust the perimeter seal so that consistent contact is maintained without creating excessive closing resistance.
Correct installation and adjustment are essential to achieving useful acoustic and smoke containment.
The silicone gasket should make continuous contact around the head and jambs, but it must not prevent the door from operating correctly.
Final performance will also depend on:
For certified acoustic, smoke or fire-resisting doorsets, follow the relevant doorset evidence and project specification in addition to the general fitting guidance above.
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