Fire Stopping in Dunton Green
Fire-rated and intumescent sealing of service penetrations and linear gaps in Dunton Green. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Unsealed joints where partitions meet the slab
- Non-fire-rated filler around services
- Improvised or mixed-product fire seals
Fire stopping near Dunton Green
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 Dunton Green
Opened ceilings and riser doors often reveal service openings nobody sealed. Where the walls and floors already have a fire-stopping specification, we can work to it, matching the product and detail it names. Where there isn’t one, the designer or fire engineer needs to set one first. We work on cable penetrations, joints between fire-resisting walls and floors and pipe penetrations, and the failures we’re asked to look at most are unsealed joints where partitions meet the slab and seals disturbed by maintenance and left open. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Dunton Green, that means joint design, primers and backing rod as standard.
Around smaller places like Dunton Green, penetration seals come up in schools, halls, pubs with rooms, care homes and farm buildings used as offices. Any service penetration through those walls should be closed with the specified product, set out as its test evidence shows.
Our workmanship is guaranteed for 12 months, in Dunton Green as everywhere else we work. If our installation lets you down in that time, we return and fix it.
- Location
- Dunton Green (TN13, TN14)
- Region
- Kent
- Guarantee
- 12 months on every job
- Price
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
When to call us in Dunton Green
Most open service penetrations are left by later work. A new cable pulled by an electrician, a pipe rerouted by a plumber or a data run drilled through a riser can leave the hole behind. Over a few years of fit-outs, a wall can collect a lot of these.
Most enquiries start with one or more of the following:
- Open linear gaps along the top of fire-resisting walls
- Improvised or mixed-product fire seals
- Fire-rated sealant that has cracked or shrunk back
- Openings found when ceilings come down for a refit
On a hospital site such as Sevenoaks Hospital (1.2 miles east of Dunton Green), fire-rated sealant goes in where the specification calls for it, with the work planned around the estates team’s permits.
Before you book anyone
- Can the work be phased to keep areas open?
- Do they follow the manufacturer’s priming guidance?
- How joint depth will be controlled
- How long is the guarantee, and what does it include?
FAQs: Dunton Green
How does the move away from BS 476 affect penetration seals in Dunton Green?
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. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.
Can you work at a site such as Sevenoaks Business Centre, by Dunton Green?
Yes, sites like Sevenoaks Business Centre are within our area, along with the rest of Dunton Green. Send details of the unit and the work through our quote form for a quick quote.
Do you offer coloured sealant?
That depends on the product. Some ranges offer many colours, others very few, so we will confirm the colours available for the specified product with the quote.
Are you insured?
Yes. Mastic Doctor is fully insured, public liability included.
When can you be on site?
The office is staffed Monday to Friday, from 8am until 5pm. Let us know your site hours and access windows, and the work will be planned around them.
How long does a typical visit take?
It depends on the scope, but the work usually takes a single visit for a short list of penetrations, or a phased programme for a whole building. For bigger or phased jobs, we will set out a timescale with the quote.
Can the building stay open while you work?
Yes, with some planning. We agree a sequence with your contact so just one area at a time is disrupted.
Building owners, agents and FMs in Dunton Green
Building owners and managing agents use us on everything from one building to a spread of sites. Several sites can go on one quote, so there’s one set of paperwork to deal with.
Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
Cost factors for service penetrations
What shapes the price:
- Removal of failed or old sealant
- Joint width, depth and condition
- Travel to remote or island sites
- Access and working height
The price depends on the quantity of joints, how much old material needs removing and the access. Call for a quote when you are ready.
Sending details for a quote
A good diagnosis starts with the right details. Tell us:
- How the joints are reached, and at what height
- Any specification or named product
- A wide shot and a close-up of the area
- Your programme or deadline
Specifications, drawings and tender packages are welcome with any enquiry, and we will price the work to it. Smaller jobs need nothing more than photos and a few notes.
General trades versus a specialist
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.
Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.
Aftercare for building managers
For the best life from the joints:
- Brief every trade that openings they make must be sealed
- File the specified details where the next contractor can find them
- Keep general-purpose fillers away from compartment walls
- Treat an open penetration as a priority repair
Give the sealant its full cure time before ceilings, boxing or decoration go over it. Not every fire-rated product can be painted.
Regular walk-rounds of service areas are worth the time. Catching a damaged seal early keeps the fix small compared with dozens found at once.
Our process
Where the site stays busy, we agree a sequence with your contact so the disruption stays in one area at once. Each area is protected, prepared and sealed, then handed back before we move to the next. Rural sites near Dunton Green may need directions, gate codes or a contact on site. Send that with the details and we will confirm the plan with the quote.
- We read the specification, drawings or penetration schedule you send and ask about anything unclear.
- Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
- 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
- Tell us your opening times and when work is allowed
- Make sure the joints can be reached
- Tell staff and tenants when we’ll be in
Get a fixed quote
Send us photos, drawings or a joint schedule and a fixed quote comes back to you. If the job needs a look first, we will arrange a site visit.
Advice
Service penetrations in Dunton Green buildings
Fire stopping of openings and penetrations in England falls under Approved Document B. From 2 September 2029, BS 476 references are being taken out of Approved Document B, leaving BS EN 13501-2 classification as the route, subject to the Government’s transitional arrangements. Either way, we install the specified product to its tested detail. Dunton Green lies roughly 18 miles out from central London. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls, and the gaps need sealing with the specified product.
Hotels such as Donington Manor Hotel (0.7 miles north-west of Dunton Green) rely on fire-resisting walls between bedrooms and corridors, and refits that add services leave penetrations to seal where fire-rated sealant is specified. For a school such as Dunton Green Primary School, penetration sealing fits best at the end of the summer works.
Dunton Green is about 1 mile north-west of Sevenoaks, in Kent. Across the TN13 postcode area, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Our Kent coverage takes in 931 places, large and small. Sites around London have their own page, about 18 miles away.
If you need fire stopping in TN13 and TN14, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Among the streets we cover are Station Road, Campion Square and London Road, and sites on any of them can send details for a fixed quote. Sites close to Dunton Green are covered too, including Riverhead (1 mile south), Chipstead (1 mile south-west), Bessels Green (1 mile south-west), Sevenoaks (1 mile south-east) and Chevening (2 miles west). Bigger towns within reach include Dartford (11 miles north), Royal Tunbridge Wells (12 miles south), Gravesend (13 miles north-east), Tonbridge (8 miles south-east), Northfleet (12 miles north-east) and Swanley (7 miles north).
What’s near Dunton Green
Recent enquiries here include premises near Montreal Park, The Miners Arms and Trinity School. Dunton Green has its own railway station: Dunton Green station. Other landmarks nearby include Otford Heritage Centre (1.5 miles north-east) and Kemsing Castle Bank (2.8 miles east). For a walk, there’s Dryhill Nature Reserve and Betsom's Hill.