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

Fire-rated sealing and fire stopping in Upton, Greater London

Work needed on a service penetration in Upton? We look at it, seal it with the right product and hand it over with a 12-month guarantee.

  • Fire-rated sealant that has cracked or shrunk back
  • Openings left by services added after handover
  • Unsealed penetrations discovered above suspended ceilings
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
Constructionline member
Fully insured: £5m PL

Fire stopping for businesses in Upton

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Owners, agents and contractors

We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Sites in Upton can sit alongside others in a wider programme.

Blocks and communal areas make up much of the work for housing associations and agents. We phase the work so people keep access, with each stage agreed with your site contact.

How we handle fire stopping in Upton

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. Reproducing the tested arrangement on site is the part we take care of. If you have snag lists that include open service penetrations and unsealed penetrations discovered above suspended ceilings, we can help, on linear gaps at wall heads, joints between fire-resisting walls and floors and service gaps in risers alike. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in Upton it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.

In London, higher-risk residential buildings under the Building Safety Act bring extra scrutiny of fire-stopping records. Our part is installing the specified fire-rated sealant; tell us what records you need and we’ll confirm with the quote.

We stand behind the joints we seal: 12 months, guaranteed. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.

Place
Upton (DA6, DA7, DA16)
Region
Greater London
Cover
12 months on every job
Quote
Fixed quote, scope in writing
Phone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

What the job involves on each surface

Metal pipes

Metal pipes conduct heat, so their details often call for extra measures along the pipe, and some details add wrapping or a set length of insulation. We follow whatever the detail requires and flag anything we can’t match.

Linear joints

Head-of-wall joints often have to absorb slab deflection. The specified product and backing for that movement are what goes in.

Common problems we fix in Upton

A common fault is a product that was never fire-rated in the first place: expanding foam or a general-purpose sealant pushed into a gap to tidy it. The opening looks sealed but has no fire test evidence behind it and has to be removed.

Look out for the following:

  • Improvised or mixed-product fire seals
  • Damaged fire seals in risers and voids
  • Head-of-wall gaps with no fire seal
  • Old intumescent sealant that has split away

For an estates team at a campus like University of Greenwich Avery Hill Campus, which lies west of Upton, summer M&E works are typically followed by a round of penetration sealing.

Before you book anyone

  • How the joint faces will be prepared and primed
  • Who will actually carry out the work
  • How they’ll work around occupants
  • Which product they’ll use, and why it suits the joint

Choosing a commercial sealant contractor

Your questions answered

Do you take on jobs in Upton where loading and access are tightly controlled?

Yes. Inductions, permits and timed loading are routine for us in London. Send the building rules and access times with your enquiry. All of Greater London is inside the ULEZ, and our planning allows for it

Can work in a care setting near Upton go ahead while residents are there?

Yes, with the manager deciding the order and timing of rooms. Noise and disruption are kept to a minimum.

Will you come and look before quoting?

It depends on the job. Simple work can often be priced from photos, while larger or less clear jobs get a site visit first.

Is the work guaranteed?

Yes, for 12 months. If our installation fails in that time, we return and fix it.

Do you work in Upton?

Yes. We cover Upton, and you can give us a call on 01277 525 020 or email us to get started.

Do you have third-party installer accreditation for fire stopping?

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 are not the right fit for that package.

Will you write the fire-stopping specification?

No, that isn’t our role. With the designer’s details in hand, we can price the sealant elements.

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.

Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.

Compartment walls and floors in Upton

Every new tenant in a London building tends to bring new cabling, and with it new holes through compartment walls. We install fire-rated sealant where it is specified and work within the building manager’s permit system. The area within 2 miles of Upton holds several hotels. Bedroom-to-corridor walls in hotels are normally fire-resisting, so new cabling or pipework through them has to be sealed to the tested detail.

For a building at a site such as Old Bexley Business Park (1.3 miles south-east of Upton), a check of penetration seals after each fit-out is good practice. Hospital estates such as Erith and District Hospital (to the north-east of Upton) are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail.

Upton is about 1 mile east of Welling, in Greater London. Our applicators travel to Upton for work on service penetrations. Across Greater London, 764 places are covered, Upton among them. For work in that direction, see our London page.

Postcode districts covered here: DA6, DA7 and DA16. Streets here include Lion Road, Upton Road and Freta Road, and sites on any of them can send details for a fixed quote. If your building is just outside Upton, we cover Bexleyheath (1 mile east), Crook Log (1 mile west), Blendon (1 mile south-west), Bexley (1 mile south) and Welling (1 mile west). Nearby towns on our patch include London (10 miles west), City of Westminster (13 miles west), Marylebone (13 miles west), Kensington (15 miles west), St Pancras (12 miles north-west) and Shoreditch (10 miles north-west).

Local landmarks in Upton

Locally, jobs take us to sites close to St Catherine's Catholic School, Danson Park and Bexleyheath Academy, among other places. Upton has its own railway station: Bexleyheath station. A little further out are Bexley Hospital (less than half a mile south-west) and Broadway Shopping Centre (0.5 miles south-east). Not far away are Summer Hill and Wansunt Pit.

Map of Upton © OpenStreetMap contributors

What sets the cost

Your fixed quote is built from the real scope. It takes account of:

  • The product specified
  • Whether old sealant has to be cut out first
  • Any access equipment needed
  • Phasing around occupants

A quote for service penetrations depends on how many there are, their condition and the access. Ask us for a fixed quote.

What to include in your enquiry

For an accurate fixed quote, we need a clear picture of the site. Send us:

  • How the joints are reached, and at what height
  • The site address and postcode
  • Any specification or named product
  • Drawings or a marked-up plan, if available

Every quote starts with the facts: the joints involved, quantities, access and the product called for. Send what you have, and we’ll arrange a site visit if anything is unclear.

Diagnose, treat, sign off

Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Any old material is cut back to clean, sound faces, the manufacturer’s primer is applied where it’s called for, and each bead is tooled to a neat concave finish. For a job in Upton, access comes first. Send the building rules and access times with your enquiry.

  1. The specification and schedule come first, so we know which details apply.
  2. We plan the sequence of floors, risers and voids with you.
  3. We compare every service penetration with its tested detail before sealing.
  4. Unsuitable material is removed and the opening cleaned so the seal starts clean.
  5. Backing and fire-rated sealant are installed to the detail and tooled.
  6. We tell you about openings that need a different product.

Getting the site ready

  • Send any specification or drawings in advance
  • Warn occupants and staff about the work
  • Send your site hours and access windows

Ask for a quote

Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we’ll return a fixed quote you can plan around. If you have questions first, ring 01277 525 020 or send details through our quote form.

Ask for a quote

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