Fire-rated sealing and fire stopping in Addington, Kent
Fire stopping for Addington, from a contractor working since 2005. Fully insured and CHAS accredited.
- Hidden openings found during inspections
- Old intumescent sealant that has split away
- Improvised or mixed-product fire seals
Fire stopping for Addington sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
About our fire stopping in Addington
Most of our fire stopping work happens after the building is up. New cable runs, replaced pipework and extra data routes all punch holes in compartment walls. We close the openings listed on your schedule, using the specified sealant and detail. If you have snag lists that include open service penetrations and service penetrations left open after M&E works, we can help, on joints between fire-resisting walls and floors, cable penetrations and small duct penetrations where the tested detail allows alike. Most enquiries from Addington start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Rural conversions around Addington can put new fire-resisting partitions inside older structures. A penetration seal only performs as tested if product, substrate, service, gap and depth all match the detail.
Whoever the client is, the cover is the same: a 12-month guarantee on our workmanship. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.
- Location
- Addington (ME19)
- Wider area
- Kent
- Cover
- 12 months on every job
- Quote
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Updated
- 3 November 2026
Maintenance after handover
Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. Our advice:
- Don’t let anyone top up a fire seal with the wrong product
- Make fire stopping part of every scope that crosses a fire-resisting wall
- Leave fire sealant to cure fully before covering it
- Include service cupboards in routine inspections
After every round of M&E works, check that the openings created have been sealed. A short check at the end of each job saves a long hunt later.
A simple record of seal locations and products helps. When a new service goes through, everyone knows which product and detail to match, and it helps at inspections.
Nearby places to Addington
More services for Addington
For managing agents and facilities managers
Hospitality, education, healthcare, office and retail clients come to us directly as well. We plan around the way the building is used, so the building keeps working while we do.
CHAS accredited and a Constructionline member, we are straightforward to vet for your supplier list. We are fully insured, and our insurance certificate can go with the quote.
Why act early in Addington
Fire stopping is a regular point raised at inspections and handover. Finding unsealed or improvised openings late can hold up a programme which is why earlier is better. Halls, stores and units around places like Addington may not be checked every day, so a failed joint can leak for a while before anyone sees it. Renewing joints in good time avoids the problem.
The work involved drives the cost: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote.
Why choose Mastic Doctor in Addington
- A Constructionline member, so easy to vet
- CHAS accredited contractor
- Commercial sealant work since 2005
- One number for every site we cover
Take a look at how commercial sealant jobs are priced or our accreditations.
Common questions from Addington clients
Is Kings Hill Business Park, near Addington, within your area?
Yes, sites like Kings Hill Business Park are within our area, along with the rest of Addington. A few photos and the unit address let us price the work.
How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Addington?
References to BS 476 classes are being removed from Approved Document B from 2 September 2029, after which BS EN 13501-2 classification is the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.
How soon can the area be used again?
That comes down to the sealant and the temperature. Some products skin over quickly but need longer to cure fully, so we will confirm the curing time on the day.
Can you work to our specification?
Yes. Send it with your enquiry, and we will price the work to it, flagging anything that needs clarifying.
When is resealing likely to be due?
It depends on movement, UV and weather, cleaning, traffic and the product. Sealant joints are maintenance items, so inspect them regularly.
Do you have public liability insurance?
Yes. Mastic Doctor is fully insured, public liability included.
Can weather delay the job?
For external joints, yes. Sealant needs a dry joint and a temperature within the product’s range, so damp, frosty or very cold days can stop external work. Internal work is rarely affected.
Fire-rated sealing for Addington buildings
Addington lies roughly 25 miles out from central London. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls; the gaps need the specified seal. In England, Approved Document B covers fire stopping of openings and penetrations. References to the older BS 476 classes are being removed from it from 2 September 2029, after which the European classification, BS EN 13501-2, is the route, subject to transitional arrangements. We install whatever has been specified, to the product’s tested detail.
Hotels like Bear Hotel (to the south-east of Addington) are refurbished in phases, and each phase can open up compartment walls. Wherever services are added at a hospital such as Maidstone Hospital, 4.9 miles south-east of Addington, the compartment line has to be made good with the specified product.
Addington is about 7 miles north-west of Maidstone, in Kent. If you’re looking for fire stopping in Addington, we can help. Addington is one of 931 places we cover in Kent for service penetrations. London is covered too, around 25 miles from Addington.
We take on service penetrations across the ME19 postcode area. Streets here include London Road, The Links and Trottiscliffe Road. Nearby places we also cover include Ryarsh (1 mile north-east), Trottiscliffe (1 mile north-west), Vigo Village (2 miles north-west), Culverstone Green (3 miles north-west) and Harvel (3 miles north). Further afield, our area takes in Maidstone (7 miles south-east), Sittingbourne (15 miles east), Dartford (12 miles north-west), Sevenoaks (9 miles west), Royal Tunbridge Wells (13 miles south-west) and Gravesend (9 miles north).
Near you in Addington
Around Addington, our work takes us to commercial buildings near The Angel Inn, The Malling School and Manor Park Country Park. Addington’s nearest station is West Malling station, roughly 1.8 miles south-east of the centre. A little further out are Coldrum Long Barrow (1.2 miles north) and Leybourne Castle (1.7 miles east).
Doing it in-house
Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
What we’re called out for in Addington
Linear gaps fail where a fire-resisting wall meets a slab, soffit or another wall. Deflection and building movement can open these gaps. Linear joint details set a width range and movement capability, and the seal has to sit within them.
These are often picked up first by site or facilities staff:
- Seals disturbed by maintenance and left open
- Builders’ foam or ordinary silicone in compartment walls
- Unsealed openings around new pipes and cables
- Unsealed joints where partitions meet the slab
For a school such as Offham Primary School, penetration sealing fits best at the end of the summer works.
What your quote should include
- Whether their applicators hold CSCS cards
- How they handle RAMS and site documents
- Proof of insurance
- Their pre-qualification and accreditations
Diagnose, treat, sign off
Tell us your site hours and access windows and we will plan around them. On the day, the work area is kept contained and tidy, and we check in with your contact before moving on to each new area. Smaller jobs around Addington can be grouped with others nearby. You will have a fixed quote before work starts.
- First we go through the drawings, schedule or specification for the seals and ask about anything unclear.
- On site, each opening is checked against the tested detail it is meant to follow.
- Unsuitable fillers and loose debris are taken out of each opening.
- Mineral wool or other backing goes in wherever the detail asks.
- Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
- If an opening needs something other than sealant, we tell you instead of improvising.
Preparing the site
- Move anything stored against the joints
- Warn occupants and staff about the work
- Arrange parking or a loading space
Getting a fixed quote
Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. The easiest way is to give us a call on 01277 525 020 or send photos by email.