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

Fire Stopping in Three Leg Cross

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

  • Fire-rated sealant that has cracked or shrunk back
  • Expanding foam used as fire stopping
  • Hidden openings found during inspections
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.
London, the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Need fire stopping in Three Leg Cross?

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

Why act early in Three Leg Cross

Open penetrations multiply: each new service adds to the list. A schedule that is dealt with regularly stays manageable. One visit to deal with every failing joint makes more sense than several trips to a place like Three Leg Cross. Photos of every joint help us quote for the whole job.

We don’t publish prices, because the scope varies so much from one building to the next. Call for a quote and we’ll price your job on its own details.

Why clients in Three Leg Cross choose us

  • 12 months’ guarantee on every job
  • One phone line for London, the South East and Scotland
  • CHAS accredited
  • Commercial sealant work since 2005

Take a look at our cost guide or our accreditations and insurance.

Fire stopping in Three Leg Cross, done properly

We are commercial sealant applicators, CHAS accredited and a Constructionline member, with CSCS-carded applicators on site. 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. Site teams most often ask us about unsealed penetrations discovered above suspended ceilings and fire-rated sealant that has cracked or shrunk back, across pipe penetrations, cable penetrations and linear gaps at wall heads. For commercial sealant work in Three Leg Cross, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.

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

We stand behind the joints we seal: 12 months, guaranteed. It covers how we prepared and applied the sealant, and we come back if anything isn’t right.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Three Leg Cross (TN5)
Wider area
East Sussex
Cover
12 months on our workmanship
Price
Quoted before any work starts
Phone
01277 525 020
Last updated
3 November 2026

When something else is needed

Being straight saves everyone time. New sealant won’t cure:

  • Approving the work on behalf of building control
  • Openings that need collars, wraps, batts or boards rather than sealant
  • Fire risk assessments, a job for a competent assessor

If in doubt, call 01277 525 020 or use the quote form and we’ll say what we think before you book.

Surfaces we seal

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

Common problems we fix in Three Leg Cross

Some service penetrations were never sealed at all, often hidden above suspended ceilings or behind boxing. Inspections, refurbishments and ceiling access usually bring them to light.

Typical triggers for a call:

  • Unsealed penetrations discovered above suspended ceilings
  • Penetration schedules that need working through
  • Fire sealant pulled out of the opening
  • Head-of-wall gaps with no fire seal

Theatres, wards and plant rooms at sites like Ticehurst House Hospital (0.5 miles south-west of Three Leg Cross) all have compartment walls crossed by services.

What to look for in a quote

  • Their plan for phasing and protecting the area
  • Whether their applicators hold CSCS cards
  • How long is the guarantee, and what does it include?
  • Is the sealant right for the movement and the substrate?

Questions to ask before you appoint anyone

Quoting for work in Three Leg Cross

To price the job, we consider:

  • How accessible the joints are
  • Location, for remote and island sites
  • Induction, permit and paperwork requirements
  • Whether old sealant has to be cut out first

Larger quantities, tricky access or phasing all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.

Sending details for a quote

A few photographs plus some basic facts will normally do. Please tell us:

  • The site address and postcode
  • Whether an asbestos survey exists
  • Drawings or a marked-up plan, if available
  • The type of building and who uses it

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, speak to us on 01277 525 020 or email drawings and photos.

Owners, agents and contractors

Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.

When you manage a building on behalf of an owner, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end, plus a 12-month guarantee.

On site: what to expect

Working in a building that stays open takes some planning. We sign and contain the area we’re in, keep walkways clear and work section by section so the rest of the building stays in use. Smaller jobs around Three Leg Cross can be grouped with others nearby. You will have a fixed quote before work starts.

  1. We ask for the product and detail your designer has specified.
  2. We sort the openings by the detail each one needs.
  3. Old or wrong materials are cut out.
  4. Where the detail needs backing, it goes in at the stated depth.
  5. Fire-rated or intumescent sealant goes in around the services and is tooled off.
  6. Completed areas are checked with you, with the records agreed when we quoted.

Getting the site ready

  • Agree which areas must stay open
  • Share your working hours and any access restrictions
  • Send asbestos survey details if the building is pre-2000

Ask for a quote

To get a fixed quote, call the office on 01277 525 020 or email drawings and photos, telling us the site location and the nature of the job. Our quote form is another easy route.

Ask for a quote

Read more

FAQs: Three Leg Cross

Would you work within a site like Ticehurst House Hospital?

Yes, healthcare and care buildings are part of our work. Each area is agreed with the ward or department and the estates team in advance.

Do you cover business parks and estates near Three Leg Cross, such as Parsonage Farm Business Centre?

Yes, sites like Parsonage Farm Business Centre are within our area, along with the rest of Three Leg Cross. To start, just speak to us on 01277 525 020 or use the quote form with the unit, the joints involved and your access times.

Can you reseal penetrations after our M&E works?

Yes, provided a specification covers them. New services after M&E works often breach existing seals and we close them with the specified product.

How long does a job like this take?

It depends on the scope, but the work typically takes anything from one day to a planned run of visits, depending on the number of seals and the access. Larger or phased jobs take longer, and we’ll give you a timescale with the quote.

How long before the joints can be used?

The product and site conditions decide that. Some products skin over quickly but need longer to cure fully, so we’ll confirm the curing time on the day.

Who decides which product is used?

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.

Can you follow the specification on our project?

Yes. The specification and the manufacturer’s installation guidance are what we work to.

Where services cross fire walls in Three Leg Cross

Approved Document B is the English guidance that covers fire stopping around openings and penetrations. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. Our part stays the same: the specified product, installed to its tested detail. Three Leg Cross lies roughly 38 miles out from central London. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls, and the gaps need sealing with the specified product.

Halls and meeting rooms at places like St Mary's Church sometimes gain new services, and any compartment wall crossed needs the specified seal. Hotels like The Bell Hotel, 0.6 miles to the south of Three Leg Cross, are refurbished in phases, and each phase can open up compartment walls.

Three Leg Cross is about 8 miles south-east of Royal Tunbridge Wells, in East Sussex. Businesses, contractors and managing agents in Three Leg Cross can call on us for service penetrations. Across East Sussex, 308 places are covered, including Three Leg Cross. Sites around Brighton have their own page, about 28 miles away.

Business premises anywhere in TN5 are within our area. Close to Three Leg Cross, our area also takes in Ticehurst (1 mile south-east), Stonecrouch (1 mile north-east), Flimwell (2 miles east), Kilndown (2 miles north) and Bedgebury Cross (3 miles north-east). A short drive away, we cover Hastings (15 miles south-east), Bexhill-on-Sea (15 miles south), Hailsham (15 miles south-west), Crowborough (10 miles west), St Leonards (15 miles south-east) and Uckfield (14 miles south-west).

Near you in Three Leg Cross

Recent enquiries here include premises near The Bull Inn Public House and the streets around them. The nearest railway station is Stonegate station, about 3 miles south-west of the centre. Well-known places in the area include Old Scotney Castle (2.5 miles north) and Finchcocks Musical Museum (3.4 miles north). Green spaces nearby include Bewl Water.

Map of Three Leg Cross © OpenStreetMap contributors
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