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

Fire-rated sealing and fire stopping in Strand-on-the-Green, Greater London

Fire-rated and intumescent sealing of service penetrations and linear gaps in Strand-on-the-Green. CHAS accredited and fully insured, with a 12-month guarantee.

  • Expanding foam used as fire stopping
  • Improvised or mixed-product fire seals
  • Service penetrations left open after M&E works
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
Constructionline member
Fully insured: £5m PL

Fire stopping for businesses in Strand-on-the-Green

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Commercial clients in Strand-on-the-Green

We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Strand-on-the-Green can form part of a wider programme across Greater London.

Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.

Fire stopping in Strand-on-the-Green

Facilities managers in Strand-on-the-Green often find open service penetrations when ceilings come down for other work. Where the walls and floors already have a fire-stopping specification, we can work to it. Where there isn’t one, the designer or fire engineer needs to set one first. If you’re dealing with seals disturbed by maintenance and left open and openings left by services added after handover, we can help. Most enquiries from Strand-on-the-Green start with one failed joint and grow into a wider look at the building: we look at the rest while we’re there and tell you what we find.

In London, higher-risk residential buildings under the Building Safety Act bring extra scrutiny of fire-stopping records. We install what the designer or fire engineer has specified, and if you need records of the work, tell us and we’ll confirm with the quote.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.

The Mastic Doctor team standing beside their branded vans outside an office building
Place
Strand-on-the-Green (W4, TW9, TW8)
Region
Greater London
Cover
12 months on every job
Quote
Quoted before any work starts
Call
01277 525 020
Updated
3 November 2026

What we can’t put right

A few problems need another trade or a different fix, and we point that out rather than sealing over them:

  • Fire doors, dampers or other fire safety equipment
  • Signing off or certifying a building’s fire stopping
  • Writing the fire-stopping specification

If in doubt, phone 01277 525 020 or email the details over and we will say what we think.

What we seal

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

Keeping the joints sound

After handover, a little attention goes a long way:

  • Report damaged or disturbed seals as soon as they’re spotted
  • Settle who seals which penetrations at the start of a project
  • Arrange inspection before areas are covered up
  • Keep general-purpose fillers away from compartment walls

Store the specified product details somewhere the next contractor can find them. Anyone resealing later needs to know which product and detail were used.

Keep a register of where seals are and what they are made of. When a new service goes through, everyone knows which product and detail to match.

Should maintenance staff do it?

The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.

For a quick touch-up, site staff may be fine, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.

How the quote is worked out

To price the job, we consider:

  • How much existing material needs removing
  • Whether the work must be split into stages
  • Joint width, depth and condition
  • How accessible the joints are

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

Sending details for a quote

Good information means a firmer quote. When you get in touch, include:

  • Anything awkward about access or site hours
  • Rough lengths or quantities, or drawings if you have them
  • Where the site is, with the postcode
  • What the building is and how it’s used

Tell us about the building, the joints and when you need the work done, and we will put a fixed quote together. To get it moving, ring 01277 525 020 or send details through our quote form.

Fire stopping in Strand-on-the-Green: the local picture

With tenants changing and fit-outs following, London buildings see service routes altered again and again. Where fire-rated sealant is specified, we install it to the tested detail under the building’s permit-to-work arrangements. Approved Document B is the English guidance that covers fire stopping around openings and penetrations. 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.

Residences at universities like Richmond American University London (to the north of Strand-on-the-Green) have compartment walls that must be resealed whenever services change. For a unit at a site such as Kew Retail Park (0.5 miles south of Strand-on-the-Green), any new service through a fire-resisting wall should be sealed to the tested detail. Hotels like Clayton Hotel Chiswick (0.6 miles north of Strand-on-the-Green) are refurbished in phases, and each phase can open up compartment walls.

Strand-on-the-Green is about 2 miles south of Acton, in Greater London. Our applicators travel to Strand-on-the-Green for work on service penetrations, handled exactly as we handle every other area. Strand-on-the-Green is one of 764 places in Greater London on our list. Our London page has more on work in that area (8 miles or so).

We take on service penetrations across the W4, TW9 and TW8 postcode area, for business premises of every kind. For a building on Kew Road, Maze Road and Kent Road or nearby, send details and we’ll quote for service penetrations. With the A3000 nearby, Strand-on-the-Green is easy to get to with materials and equipment. If your building is just outside Strand-on-the-Green, we cover Kew (1 mile south), Grove Park (1 mile east), Gunnersbury (1 mile north), North Sheen (1 mile south) and Turnham Green (1 mile east). Nearby towns on our patch include London (8 miles east), City of Westminster (6 miles east), Marylebone (6 miles east), Kensington (3 miles east), St Pancras (7 miles north-east) and Shoreditch (9 miles east).

Local landmarks in Strand-on-the-Green

Around Strand-on-the-Green, our work takes us to commercial buildings near Chiswick School, Kew Green and Bull's Head pub, among other places. Nearby too are Library for Iranian Studies (1.6 miles north) and Kew College Prep (less than half a mile south-west). For rail, the closest station is Chiswick station, about 0.5 miles south-east. Nearby you will also find Livat Hammersmith (2.2 miles east) and Barnes Hospital (1.5 miles south-east). Not far away are Richmond Hill and Kew Gardens Lake.

Map of Strand-on-the-Green © OpenStreetMap contributors

How a job runs

Before any cutting starts, the area is protected: masking tape along the joint edges and sheeting over anything nearby. The work itself typically takes anything from one day to a planned run of visits, depending on the number of seals and the access, and we clear our waste as we work. For a job in Strand-on-the-Green, access comes first: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Send the building rules and access times with your enquiry.

  1. We start with your penetration schedule, drawings or specification.
  2. Access, permits and the order of areas are agreed with the site team.
  3. Each opening is checked for wall or floor type, service, gap and depth.
  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

  • Let building users know which areas are affected
  • Make sure the joints can be reached
  • Share your working hours and any access restrictions

Getting a fixed quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to give us a call on 01277 525 020 or email a schedule or drawings with what you know.

Get a quick quote

Advice

Common questions from Strand-on-the-Green clients

Do you take on jobs in Strand-on-the-Green where loading and access are tightly controlled?

Yes, we plan every London job around the building’s own access rules. Say when the building is occupied and when it’s quiet, and we will plan accordingly. The ULEZ covers the whole of Greater London, which we allow for

Is Kew Retail Park, near Strand-on-the-Green, within your area?

Yes. Estates, retail parks and business parks around Strand-on-the-Green, Kew Retail Park among them, are all within reach. A few photos and the unit address let us price the work.

What does an EI 60 rating mean?

BS EN 1366-3 covers penetration seals and BS EN 1366-4 covers linear joints. Classification follows BS EN 13501-2. That rating only holds when the product is installed to its tested detail.

How do you choose the sealant?

Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.

Will you come and look before quoting?

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

Do you work to architects’ specifications?

Yes. Include it with the drawings when you ask for a quote, and we’ll price the work to it.

Do the same rules apply to fire stopping in Scotland?

Our area runs from Greater London and the South East to every part of Scotland. Scotland’s non-domestic Technical Handbook, clause 2.1.14, expects service penetrations to be fire stopped to at least the wall or floor’s fire resistance, using products tested for their end use.

Accreditations

Trusted. Accredited. Insured.