The Mastic Doctor team standing beside their branded vans outside an office building
Buckinghamshire · England

Fire-rated sealing and fire stopping in Coombe, Buckinghamshire

Fire-rated and intumescent sealing of service penetrations and linear gaps in Coombe. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Damaged fire seals in risers and voids
  • Improvised or mixed-product fire seals
  • Fire-stopping items raised at inspection or handover
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
South East, London & Scotland
CHAS accredited
Fully insured: £5m PL

Need fire stopping in Coombe?

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Building owners, agents and FMs in Coombe

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, with each stage agreed with your site contact.

Building owners and managing agents use us on sealant work across single buildings or whole portfolios around Coombe. One quote can cover more than one site, so there’s one set of paperwork to deal with.

How we handle fire stopping in Coombe

No fire sealant works on its own: the evidence covers a specific product, wall or floor type, service, gap, depth and backing. We match each opening to that detail before any sealant goes in, and raise it with you if it falls outside. We work on cable penetrations, service gaps in risers and linear gaps at wall heads, and the usual reasons a site gets in touch are old intumescent sealant that has split away and head-of-wall gaps with no fire seal. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Coombe, that means joint design, primers and backing rod as standard.

For a smaller site near Coombe, we plan to do all the penetrations in one go, so send the specification and photos first. Design and sign-off belong to the designer or building control; we install what’s specified.

Our 12-month guarantee is about workmanship, not wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we spell out the cover before we begin.

Location
Coombe (HP17)
Region
Buckinghamshire
Cover
12 months on our workmanship
Quotes
Quoted before any work starts
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Keeping the joints sound

Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. We suggest:

  • Get seals inspected before ceilings and boxing close
  • Record which product was used where
  • Flag new cables with no seal around them
  • Settle who seals which penetrations at the start of a project

Once the seals are in, tell other trades they exist and must not be disturbed. Any seal cut back for a new service needs reinstating to its tested detail using the same product.

Specify fire stopping early on refits, not as an afterthought. Details can then be picked to suit the actual pipes, cables and ducts.

General trades versus a specialist

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.

Putting right a botched joint often costs more than sealing it well at the start, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.

Fire-rated sealing for Coombe buildings

At about 34 miles from central London, Coombe is within reach of the capital. 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. The area within 2 miles of Coombe holds several hotels. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal.

Hospital estates such as The Paddocks Hospital, 2.5 miles south-west of Coombe, are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail. Offices at parks like Station Approach Business Park (to the north-east of Coombe) are re-cabled with each new tenant, and compartment walls need sealing afterwards to the tested detail. In a building such as Church of St Peter and St Paul, any service penetration through a fire-resisting wall should be sealed to the specified detail.

Coombe is about 5 miles south of Aylesbury, in Buckinghamshire. Businesses, contractors and managing agents in Coombe use us for work on service penetrations. Coombe is one of 308 places we cover in Buckinghamshire for service penetrations. Sites around Oxford have their own page, about 19 miles away.

Commercial sites across HP17 are covered. If your building is just outside Coombe, we cover Butler's Cross (1 mile north), Ellesborough (1 mile north-west), Chalkshire (1 mile north), Terrick (1 mile north) and Nash Lee (1 mile north). Nearby towns on our patch include Aylesbury (5 miles north), High Wycombe (8 miles south), Chesham (8 miles east), Marlow (12 miles south), Amersham (9 miles south-east) and Beaconsfield (11 miles south-east).

Near you in Coombe

In Coombe, that means premises near John Colet School and The Russell Arms, among other places. The nearest railway station is Little Kimble station, about 1.3 miles west. Nearby you will also find Little Kimble Motte (1 mile west) and Trenchard Museum (3.1 miles north-east). Open spaces near Coombe include Brush Hill Local Nature Reserve and Coombe Hill.

Map of Coombe © OpenStreetMap contributors

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 before we move to the next. If others near Coombe need work, visits can be combined. You’ll have a fixed quote before work starts.

  1. We read the specification, drawings or penetration schedule you send and raise any questions before we price.
  2. Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
  3. Unsuitable fillers and loose debris are taken out of each opening.
  4. We fit the backing the detail asks for, to the stated depth.
  5. Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
  6. Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.

Before we start on site

  • For older buildings, check the asbestos register before work
  • Agree which areas must stay open
  • Let building users know which areas are affected

Quotes

Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, phone 01277 525 020 or use the quote form.

Ask for a quote

Related advice

What the job involves on each surface

Cables and cable bundles

Single cables and small bundles are often within a fire-rated sealant’s tested detail. The detail limits bundle size and the gaps between and around cables.

Linear joints

Head-of-wall gaps, slab edges and wall junctions are linear joints. Their tested detail, under BS EN 1366-4, sets the width, depth, backing and movement allowed.

Questions about Coombe

Does your area include sites such as Station Approach Business Park, near Coombe?

Yes. We cover Coombe and the area around it, including industrial estates, business parks and retail parks such as Station Approach Business Park. Photos and a short description are enough for a first look.

What happens to BS 476 references for fire stopping in Coombe?

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. The designer or fire engineer sets the specification, and we install the product to the manufacturer’s tested detail.

Are you insured?

Yes. We are fully insured, and the certificate can go with your quote.

Will your applicators have CSCS cards?

Yes. Should the site need card details in advance, tell us and we will confirm them with the quote.

Will you come and look before quoting?

Photos, drawings or a schedule are often enough to quote. If the job needs a look first, we will arrange a visit.

Can you work while the building is occupied?

Yes, with some planning. Tell us your site hours and access windows and we will plan around them.

What happens if old sealant might contain asbestos?

The duty to manage asbestos sits with the building’s dutyholder, so we will ask for the register before work on an older building. If anything suspect turns up, we stop until it’s tested.

When it isn’t the sealant

Before quoting, we check that sealant is the right answer. It isn’t the answer for:

  • Issuing fire ratings or certificates for seals
  • Large openings beyond what any sealant detail covers
  • Writing the fire-stopping specification

If in doubt, speak to us on 01277 525 020 or send details through our quote form and we’ll say what we think before you book.

Surfaces we seal

  • Small duct penetrations where the tested detail allows
  • Cable penetrations
  • Pipe penetrations
  • Joints between fire-resisting walls and floors
  • Linear gaps at wall heads
  • Service gaps in risers
Accreditations

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