Edge detailing, intumescents & seals.

Door edges & lippings.



Hardwood lippings are generally appliedto vertical door edges, although they canalso be applied to top and bottom edges where required – for example where usedexternally. Timber species are usually selected to match veneers. Lippings provideprotection to the edge of the door and specifically its face, as well as covering the door core. Details of door edges for various situations are illustrated below/opposite.

 

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Astragals & angle stops.



For pairs of doors, astragals are required to cloak meeting stiles for sound reduction at 38 RwdB and radiation areas.

Where pairs of doors are used with an overpanel but without transom, steel angle stops are fitted for the doors to close against.

Astragals & angle stops.



For pairs of doors, astragals are required to cloak meeting stiles for sound reduction at 38 RwdB and radiation areas.

Where pairs of doors are used with an overpanel but without transom, steel angle stops are fitted for the doors to close against.

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Intumescents & smoke seals.



Perimeter fire seals are essential to performance and form an integral part of the doorset fire rating, irrespective of stop size. There are three types available: intumescent, intumescent and smoke seal combined, and concealed intumescent. The first two systems incorporate exposed intumescent strips to the frame jambs and head as standard, whereas the concealed method houses the intumescent strips
behind vertical door lippings but exposed on top – this provides 30 minutes fire resistance only.

Generally, exposed intumescents are 15mm x 4mm for 30 minute performance or 2 no 15mm x 4mm seals for 60 minutes. Intumescent colour is determined by veneer selection and will be either maple or light brown. If doorsets are primed for paint white intumescents
Where complete doorsets are being supplied, all necessary intumescent seals will be included to the frame as standard, in order to achieve the stated performance. In the case of pairs of fire-rated doors, a combined intumescent and smoke seal will be incorporated at the meeting stile of the primary leaf corresponding with a plain intumescent in the secondary leaf.

Where doors only are being supplied, seals need to be specified precisely if required. If intumescents are to be fitted by others, they must comply with our fire certification requirements under the BWF CERTIFIRE data sheet or Trada Q-Mark schemes.
To reduce friction and aid compliance with opening force requirements a PS01 compression seal is fitted in the stop to provide smoke protection in accordance with BS 476 Part 31.1, ‘Requirement for Cold Smoke Protection’,
providing the gap at the bottom of the door does not exceed 3mm. If it does, an additional threshold seal will be required.

The diagrams which follow indicate the positions of intumescents and seals for various fire ratings and configurations. FD90 and FD120 doors are supplied
as part of doorsets only, including the necessary intumescents.

Acoustic.



Doorsets are supplied with all the necessary seals fitted to either door or frame. With acoustic doors the gap
between door and threshold on the floor must also be sealed with contact seals or wiping seals, depending on performance requirements and floor finish.

Thresholds are needed and these must be level with the door. They should be bedded on mastic and screw-fixed direct to hard surfaces while carpet and textured flooring should stop either side. Low profile aluminium thresholds may be fixed on a hardwood packer so that the top of the threshold is 5mm above the floor finish.
Gaps between back of frame and wall must be fully packed with mineral wool, leaving only enough space for mastic pointing or Ecoguard where no architrave is used. Special care is needed to check that doors close correctly all around, noting a slight resistance when the door closes against its seals.

• A level floor is essential to threshold sealing
• Seal under the threshold and bottom of jambs, as well as back of frame
• Frame should be plumb square and level to ensure that seals contact fully all around
• Seals must not be cut for ironmongery
• Never paint seals or close a freshly painted door onto them
• Avoid damaging all seals, particularly on the bottom edge
• Periodic checks of seals will help maintain performance

It is possible to factory-fit recessed drop seals into the bottom of the door leaf to meet sound reduction criteria.

Drop seals.



Drop seals should be factory-fitted at the bottom of the door to close the gap with the floor when the door is closed using a mechanical system. This may be useful for smoke containment and low level acoustic control, particularly where the requirements for disabled accessibility call for an unimpeded floor surface. Where supplied and fitted by others, we must be informed early to adjust the door construction to accommodate this.

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Air pressure balacing, thresholds, meeting stiles, edge protection & Ecoguard™.



Air pressure balancing
Factory-fit recessed drop seals can be added into the bottom of the door leaf to meet air control criteria. Air leakage test results to BS 476 Part 31.1 under various
pressure differentials are available for air balancing calculations. Best practice on-site is critical, sound is
like water in that all gaps must be properly sealed to stop leakage.

Thresholds
Thresholds may be needed for acoustic and smoke control applications to restrict below-door gaps, working in conjunction with appropriate door-mounted seals.
Essential thresholds must be fixed parallel to the bottom of the door and may be screw-fixed directly to hard surfaces such as concrete or smooth vinyl.

For carpet or textured/profiled vinyl flooring, they can be fixed directly to floor screeds.

Aluminium thresholds for acoustic purposes should be located on a hardwood packer (to suit the floor finish depth) with mastic to threshold/packer and packer/
screed.

Note: Intumescent detail may vary from that shown
depending on performance and certification

Meeting stiles
Regardless of fire rating the meeting stile on door pairs have bladed seals to block the sightline.
Edge protection
Postformed impact resistant PVC edge protectors can be fitted to the leading edge of the door leaf. These match the kick and push plates ensuring total protection is provided to both the face and edge of the leaf.

Ecoguard™
The newly developed wedge-shaped Ecoguard® seal is designed for application between the gaps of a doorframe and the surrounding wall during installation to improve building safety. Its compressible nature ensures a precise and dry fit can be achieved in varying gap widths without the need for messy intumescent mastic.

Ecoguard® is a fully certified product tested in accordance with BS 476 part 22 and provides an even coverage around the frame that is guaranteed to meet all relevant fire safety regulations. Fire tested to BS standards with Ecoguard® fitted on either side of the door for 30 minutes and both sides for 60 minutes. Ecoguard® also meets BS smoke performance criteria without the application of any additional sealing and meets EN standards for acoustics.

These characteristics are printed on each strip so contractors can be reassured it will satisfy building control officers without the need for further investigation – where mastic has been used they have to invasively check it has been applied to the correct depth, causing additional repair work on-site.

Air pressure balacing, thresholds, meeting stiles, edge protection & Ecoguard™.



Air pressure balancing
Factory-fit recessed drop seals can be added into the bottom of the door leaf to meet air control criteria. Air leakage test results to BS 476 Part 31.1 under various
pressure differentials are available for air balancing calculations. Best practice on-site is critical, sound is
like water in that all gaps must be properly sealed to stop leakage.

Thresholds
Thresholds may be needed for acoustic and smoke control applications to restrict below-door gaps, working in conjunction with appropriate door-mounted seals.
Essential thresholds must be fixed parallel to the bottom of the door and may be screw-fixed directly to hard surfaces such as concrete or smooth vinyl.

For carpet or textured/profiled vinyl flooring, they can be fixed directly to floor screeds.

Aluminium thresholds for acoustic purposes should be located on a hardwood packer (to suit the floor finish depth) with mastic to threshold/packer and packer/
screed.

Note: Intumescent detail may vary from that shown
depending on performance and certification

Meeting stiles
Regardless of fire rating the meeting stile on door pairs have bladed seals to block the sightline.
Edge protection
Postformed impact resistant PVC edge protectors can be fitted to the leading edge of the door leaf. These match the kick and push plates ensuring total protection is provided to both the face and edge of the leaf.

Ecoguard™
The newly developed wedge-shaped Ecoguard® seal is designed for application between the gaps of a doorframe and the surrounding wall during installation to improve building safety. Its compressible nature ensures a precise and dry fit can be achieved in varying gap widths without the need for messy intumescent mastic.

Ecoguard® is a fully certified product tested in accordance with BS 476 part 22 and provides an even coverage around the frame that is guaranteed to meet all relevant fire safety regulations. Fire tested to BS standards with Ecoguard® fitted on either side of the door for 30 minutes and both sides for 60 minutes. Ecoguard® also meets BS smoke performance criteria without the application of any additional sealing and meets EN standards for acoustics.

These characteristics are printed on each strip so contractors can be reassured it will satisfy building control officers without the need for further investigation – where mastic has been used they have to invasively check it has been applied to the correct depth, causing additional repair work on-site.

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Talk to us to see how we can help you.

Our highly skilled team is always happy to share its technical expertise, whether over the phone or face-to-face.
Or call us on 01623 343111

Talk to us to see how we can help you.

Our highly skilled team is always happy to share its technical expertise, whether over the phone or face-to-face.

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