Dunn Street fire stopping
Our CSCS-carded applicators take on fire-rated and intumescent sealing of service penetrations and linear gaps in Dunn Street. Send details for a fixed quote.
- Fire-rated sealant that has cracked or shrunk back
- Openings left by services added after handover
- Openings found when ceilings come down for a refit
Fire stopping for businesses in Dunn Street
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Fire stopping in Dunn Street
Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member. We don’t hold a third-party fire-stopping installer certificate. We install the specified fire-rated sealant to its tested detail, and our workmanship carries a 12-month guarantee. If you’re dealing with penetration schedules that need working through and open linear gaps along the top of fire-resisting walls, we can help. Searching for sealant specialists in Dunn Street? Mastic Doctor has worked for contractors, FMs and building owners since 2005, with CSCS-carded applicators.
Around smaller places like Dunn Street, penetration seals come up in schools, halls, pubs with rooms, care homes and farm buildings used as offices. If sealant is what the specification names, we install it around the services exactly as the maker’s detail sets out.
A 12-month guarantee applies to all our work in Kent. If an installation problem shows up, call the office on 01277 525 020 or send details through our quote form and we’ll arrange a return visit.
- Place
- Dunn Street (ME7)
- Region
- Kent
- Cover
- A 12-month guarantee
- Price
- Quoted before any work starts
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
What sets the cost
These are the things that shape the price:
- Joint width, depth and condition
- Specialist products, such as fire-rated or hygienic sealants
- The total length or number of joints
- Working within restricted access windows
Access can matter as much as the joints themselves: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.
Sending details for a quote
Whether it’s one area or a whole building, the same details help:
- Any dates the work must fit around
- Asbestos survey details if the building is older
- How the joints are reached, and at what height
- Specification clauses that apply
To get a fixed quote, phone 01277 525 020 or send photos by email, telling us the site location and the nature of the job. You can also send details through our quote form.
Common problems we fix in Dunn Street
Some seals fail because the wrong product went in: builders’ foam or ordinary silicone used to fill a hole. The opening looks sealed but has no fire test evidence behind it, so it has to come out.
If one of these sounds familiar, it’s time for a closer look:
- Unsealed penetrations discovered above suspended ceilings
- Snag lists that include open service penetrations
- Head-of-wall gaps with no fire seal
- Fire sealant pulled out of the opening
Campus buildings at universities such as University for the Creative Arts - Rochester, 4.4 miles to the north-west of Dunn Street, see constant changes to data and services, and fire-rated sealant goes in around new penetrations where it is specified.
Before you book anyone
- Do they follow the manufacturer’s priming guidance?
- What site paperwork they can supply
- Will failed sealant be removed rather than covered?
- Their plan for phasing and protecting the area
Fire stopping around Dunn Street: what changes locally
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. Dunn Street is about 31 miles from central London. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls; the gaps need the specified seal.
For a hospital such as Spire Alexandra Hospital, 1.9 miles west of Dunn Street, penetration sealing is normally phased ward by ward, with infection-control rules agreed first. In a building such as Church of St Peter, any service penetration through a fire-resisting wall should be sealed to the specified detail.
Dunn Street is about 3 miles south-east of Chatham, in Kent. Commercial clients in Dunn Street can call on us for service penetrations. Across Kent, 931 places are covered, Dunn Street among them. We also cover London, around 31 miles from Dunn Street.
Anyone looking for fire stopping in ME7 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. Close to Dunn Street, our area also takes in Lidsing (1 mile north-west), Bredhurst (1 mile north-east), Scragged Oak (1 mile south-east), Kemsley Street (1 mile north-east) and Lower Cox Street (1 mile south-east). Further afield, our area takes in Maidstone (5 miles south-west), Sittingbourne (7 miles east), Gravesend (11 miles north-west), Tonbridge (15 miles south-west), Faversham (14 miles east) and Northfleet (12 miles north-west).
Near you in Dunn Street
Around Dunn Street, our work takes us to commercial buildings near South Wood and The Harrow pub. The closest station to Dunn Street is Rainham (Kent) station, about 3.3 miles north-east. Nearby you will also find Medway megaliths (3.1 miles west) and KIMS hospital (2.8 miles south). Open spaces near Dunn Street include Burham Down and Boxley Hills.
Dunn Street: questions and answers
Does your area include sites such as Hempstead Valley Shopping Centre, near Dunn Street?
Yes. We cover Dunn Street and the area around it, including industrial estates, business parks and retail parks such as Hempstead Valley Shopping Centre. To start, just ring 01277 525 020 or use the quote form with the unit, the joints involved and your access times.
Is Dunn Street off your patch?
No. Small places get the same service as large ones. London and every South East county are within our area. We plan jobs in smaller places so return trips are kept to a minimum.
Will fire-rated sealant work on every penetration?
No. Each fire-rated sealant is tested for particular services, gap sizes and substrates. Outside that, a different product is needed, specified by your designer.
How do you choose the sealant?
If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
Is your workmanship covered by a guarantee?
Yes. Workmanship is guaranteed for 12 months.
Can one quote cover more than one building?
Yes. Several buildings can share a single quote, with one point of contact.
Are you members of a third-party fire-stopping installer scheme?
No. We don’t hold a third-party fire-stopping installer certificate. Our credentials are CHAS accreditation, Constructionline membership and CSCS-carded applicators, and we are fully insured. If your contract requires third-party installer certification, we’re not the right fit for that package.
Why it’s worth doing now in Dunn Street
The longer openings stay, the more there tend to be: each new service adds to the list. Keeping on top of it after each round of works keeps the job small, rather than turning into a full building survey and reseal. Older rural buildings around Dunn Street move with the seasons, and rigid or tired sealant can’t keep up. A sealant with the right movement capability, correctly sized, lasts far better.
We don’t publish prices, since every building and every scope is different. For a fixed figure, call for a quote.
What you get with us
- Constructionline member
- Over 20 years of commercial sealing
- Work to your specification and the manufacturer’s guidance
- 12-month guarantee on workmanship
Take a look at what affects the cost and our accreditations and insurance.
Also near Dunn Street
Also in Dunn Street
On site: what to expect
Diagnose, treat, sign off: that’s the shape of every visit. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and the job ends with a walk round and sign-off. Jobs in and around smaller places like Dunn Street are usually planned as a single visit, so photos and measurements up front really help. That way the right products come on the day.
- We start with your penetration schedule, drawings or specification.
- Access, permits and the order of areas are agreed with the site team.
- We compare every service penetration with its tested detail before sealing.
- Foam, ordinary sealant and debris come out first.
- The specified backing and sealant go in to depth and are finished neatly.
- Anything outside the detail is reported to you rather than sealed.
Getting the site ready
- Move anything stored against the joints
- For older buildings, check the asbestos register before work
- Let building users know which areas are affected
Getting a fixed quote
Need a figure for a tender or a budget? Send the scope and any drawings, and we’ll return a fixed quote that you can work with. For a chat about it beforehand, give us a call on 01277 525 020 or email drawings and photos.
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Commercial clients in Dunn Street
Facilities managers want contractors who arrive with the paperwork sorted. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we will confirm them with the quote.
CHAS accredited and a Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.
After the work
A few simple habits keep the new joints working:
- File the specified details where the next contractor can find them
- Ask which product is in place before decorating
- Don’t let anyone top up a fire seal with the wrong product
- Agree the fire-stopping specification before services go in
New services after handover are a common way fire stopping gets breached. A short check at the end of each job saves a long hunt later.
Make reporting new openings part of every permit to work in service areas. Small habits like this stop openings building up.