Fire-rated sealing and fire stopping in Key's Green, Kent
Fire-rated and intumescent sealing of service penetrations and linear gaps in Key's Green and across Kent. CHAS accredited and fully insured, with a 12-month guarantee.
- Snag lists that include open service penetrations
- Hidden openings found during inspections
- Service penetrations left open after M&E works
Fire stopping near Key's Green
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Fire stopping in Key's Green, done properly
The test standards are BS EN 1366-3 for penetration seals and BS EN 1366-4 for linear joints, with results classified under BS EN 13501-2. A rating such as EI 60 only holds when the product is installed as it was tested. So our job is to reproduce that arrangement faithfully. Most enquiries involve old intumescent sealant that has split away and openings left by services added after handover, across linear gaps at wall heads, pipe penetrations and small duct penetrations where the tested detail allows. Most enquiries from Key's Green start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.
Barn and farm-building conversions near places like Key's Green often combine new partitions with old walls. Where a pipe or cable passes through a fire-resisting wall, the seal must match the tested detail: product, substrate, gap and depth.
Guaranteed is the last step of every job. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.
- Where
- Key's Green (TN12)
- Region
- Kent
- Cover
- 12 months on every job
- Quote
- A fixed quote before we start
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
Common questions from Key's Green clients
How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Key's Green?
From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.
Is hospital work, at somewhere like Tunbridge Wells Hospital at Pembury, something you do?
Yes, provided the work is planned with the site’s estates team. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.
Do you seal on top of existing sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, since fresh sealant will not bond reliably to aged material.
How much does the work cost?
There isn’t a price list, as every site differs. With photographs or drawings, we can give you a fixed quote.
Does the weather affect the work?
For external joints, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Inside work is seldom held up.
How do I request a quote?
There are four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. The first step only needs photographs and a postcode.
Do your applicators hold CSCS cards?
Yes. Our applicators hold CSCS cards, as many construction sites ask for.
Places near Key's Green
Other services in Key's Green
When something else is needed
Being straight saves everyone time. New sealant won’t cure:
- Fire doors, dampers or other fire safety equipment
- Deciding what a wall or floor needs, which belongs to the designer
- Openings that need collars, wraps, batts or boards rather than sealant
Not sure which it is? You can call 01277 525 020 or email drawings and photos and we will tell you honestly before you book.
Joints and surfaces we work on
- Cable penetrations
- Linear gaps at wall heads
- Joints between fire-resisting walls and floors
- Service gaps in risers
- Small duct penetrations where the tested detail allows
- Pipe penetrations
Service penetrations in Key's Green buildings
For England, the fire stopping of penetrations is dealt with in Approved Document B. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. We install whatever has been specified, to the product’s tested detail. Key's Green lies roughly 32 miles out from central London. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls; the gaps need the specified seal.
At a healthcare site like Tunbridge Wells Hospital at Pembury, 2.4 miles north-west of Key's Green, new services through compartment walls are a constant, and each needs the specified seal. Halls and meeting rooms at places like Chapel Of Ease Of St Luke sometimes gain new services, and any compartment wall crossed needs the specified seal.
Key's Green is about 4 miles east of Royal Tunbridge Wells, in Kent. Any commercial site in Key's Green is covered, whether it’s a single job or part of a planned programme. 931 places across Kent fall within our area, Key's Green among them. There’s a separate page for Brighton, roughly 30 miles from Key's Green.
Work on service penetrations is covered throughout TN12, for business premises of every kind. Buildings on Cryals Road and Beech Lane are within our area. Nearby places we also cover include Lamberhurst Quarter (1 mile south), Petteridge (1 mile north-east), Pembury (2 miles north-west), Matfield (2 miles north-east) and Brenchley (2 miles north-east). A short drive away, we cover Maidstone (12 miles north-east), Sevenoaks (13 miles north-west), Royal Tunbridge Wells (4 miles west), Tonbridge (6 miles north-west), Kings Hill (10 miles north) and Foley Park (13 miles north-east).
Around Key's Green
Recent enquiries here include premises near Brenchley Wood and The Blue Boys Inn, among other places. Key's Green’s nearest station is Frant station, about 3.5 miles south-west of the centre. Other landmarks nearby include Pembury Hospital (2.4 miles north-west) and Old Scotney Castle (3.7 miles south-east). For a walk, there’s Bewl Water and Tudeley Woods RSPB reserve.
Quoting for work in Key's Green
Your fixed quote is built from the real scope. It allows for:
- Whether old sealant has to be cut out first
- Quantities, in metres or numbers
- Joint width, depth and condition
- How accessible the joints are
What a job costs comes down to the quantity of joints, how much old material needs removing and the access. Call for a fixed quote when you’re ready.
Before you send an enquiry
To price the job accurately, we need a clear picture of the site. Useful things to include:
- What the building is and how it’s used
- Any dates the work must fit around
- Specification clauses that apply
- Approximate linear metres or a joint schedule
Specifications, drawings and tender packages are welcome with any enquiry, and we will price the work to it. For smaller jobs, photographs and a description will do.
Why deal with it now?
The longer openings stay, the more there tend to be: each new service adds to the list. A schedule that is dealt with regularly stays manageable. Around Key's Green, it’s better to renew all the failing joints at once, rather than one at a time. Send photos of each area and we’ll quote for the lot.
The specified product makes a difference, and so does the preparation. Access, phasing and site requirements come into it too.
Why choose Mastic Doctor in Key's Green
- Sealing commercial buildings since 2005
- A Constructionline member, so easy to vet
- CSCS-carded applicators
- Old sealant cut out, never sealed over
See our cost guide or our accreditations.
Our process
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Joint faces are cleaned back to sound, dry surfaces, primer goes on where the manufacturer specifies it, and the sealant is tooled off neatly. Jobs in and around smaller places like Key's Green are usually planned as a single visit, so photographs 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.
- Each opening is checked for wall or floor type, service, gap and depth.
- Foam, ordinary sealant and debris come out.
- The specified backing and sealant go in to depth and are finished neatly.
- Anything outside the detail is reported to you rather than sealed.
Preparing the site
- Tell staff and tenants when we’ll be in
- Have the specification and drawings to hand
- Clear stock, furniture or equipment away from the joints
Get a fixed quote
The quickest route to a quote is a few photographs and the site postcode. Send them through the quote form, or speak to us on 01277 525 020 or send details through our quote form if you’d rather talk the job through.
Related advice
What the job involves on each surface
Drylining partitions
Plasterboard partitions are tested as a specific construction. The sealant detail has to be tested in that wall type, with the stated board layers before sealing.
Metal pipes
Sealant details often cover copper and steel pipework. Pipe diameter, annular gap, sealant depth and any pipe insulation all have to match the detail, so we check each one.
For managing agents and facilities managers
We work for building owners and managing agents on everything from one building to a spread of sites. Several sites can go on one quote, which keeps the paperwork simple.
Blocks and communal areas make up much of the work for housing associations and agents. We phase the work so people keep access, and each stage is agreed with your contact.