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

Fire Stopping in Alton

We carry out fire-rated and intumescent sealing of service penetrations and linear gaps in Alton and the surrounding area. Send details for a fixed quote.

  • Snag lists that include open service penetrations
  • Fire-rated sealant that has cracked or shrunk back
  • Openings left by services added after handover
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
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
CHAS accredited
£5m public liability

Fire stopping for businesses in Alton

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

Alton: questions and answers

Does your area include sites such as Kerridge Industrial Estate, near Alton?

Yes. We cover Alton and the area around it, including industrial estates, business parks and retail parks such as Kerridge Industrial Estate. To start, just phone 01277 525 020 or use the quote form with the unit, the joints involved and your access times.

Is hospital work, at somewhere like Alton Community Hospital, something you do?

Yes. Healthcare sites are among the places we work. We follow the site’s permits, sign-in and infection-control procedures in every area.

What happens if old sealant might contain asbestos?

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

How soon can the area be used again?

That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.

What about RAMS and site documents?

Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote.

Do you work in Scotland as well as England?

Our area runs from Greater London and the South East to every part of Scotland. In Scotland, clause 2.1.14 of the non-domestic Technical Handbook says service penetrations should keep at least the fire resistance of the wall or floor, with proprietary products tested for the end use.

Will fire-rated sealant work on every penetration?

No. Each fire-rated sealant is tested for particular services, gap sizes and substrates. If an opening falls outside, it needs another solution, specified by your designer.

How we handle fire stopping in Alton

For main contractors, our fire stopping package slots in after the M&E trades have finished in an area. To price a package, speak to us on 01277 525 020 or use the quote form with the schedule or marked-up drawings alongside the manufacturer’s details. Tell us what records you need and we will confirm with the quote. The enquiries we see most involve old intumescent sealant that has split away and hidden openings found during inspections, on pipe penetrations, service gaps in risers and small duct penetrations where the tested detail allows. For commercial sealant work in Alton, you deal with one contact from quote to sign-off, whether it’s one building or several.

In a town such as Alton, fire-rated sealing is often needed in schools, surgeries, care homes, offices and flats above shops. New cabling or pipework through a fire-resisting wall leaves a gap that has to be made good with the specified product.

What our 12-month guarantee covers is the way we did the job: preparation, application and finish. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

Location
Alton (GU34)
Region
Hampshire
Guarantee
12 months on our workmanship
Quote
A fixed quote before we start
Telephone
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

What sets the cost

What shapes the price:

  • Distance, for remote addresses
  • Specialist products, such as fire-rated or hygienic sealants
  • The size and state of each joint
  • Site requirements such as inductions and permits

Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Mention the access as part of your enquiry.

What we need to price the job

Whether it’s one area or a whole building, these details speed things up:

  • Your programme or deadline
  • The site address and postcode
  • Approximate linear metres or a joint schedule
  • Specification clauses that apply

Let us know the site, the scope and your timescale, and a fixed quote will follow. To get it moving, speak to us on 01277 525 020 or send photos by email.

Signs you need fire stopping in Alton

Mixing products or improvising a detail breaks the link with the test evidence. An oversized gap, too shallow a bead, missing backing or two makers’ products combined are the usual culprits.

These are often picked up first by site or facilities staff:

  • Open linear gaps along the top of fire-resisting walls
  • Builders’ foam or ordinary silicone in compartment walls
  • Fire sealant pulled out of the opening
  • Fire seals cut back for extra cables and never reinstated

In a hotel such as The Crown Hotel, which lies east of Alton, new pipework or cabling through bedroom and corridor walls needs sealing with the specified product.

What to look for in a quote

  • Will CSCS-carded applicators be on site?
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?
  • Will RAMS and insurance details be available?
  • Do they follow the manufacturer’s priming guidance?

Choosing a commercial sealant contractor

Looking after the joints

A few simple habits keep the new joints working:

  • Put resealing into every M&E and fit-out package
  • Check risers and ceiling voids after each round of works
  • Check with the data sheet before painting over fire sealant
  • Have penetrations checked while they can still be seen

Add risers, plant rooms and ceiling voids to routine fire-stopping checks. Watch for cracked sealant, new services with no seal and openings that have grown.

Looking at service areas on a regular cycle pays off. A cracked or disturbed seal found early is a small job compared with dozens found at once.

Our process

Working in a building that stays open takes some planning. The work area is signed and kept contained, with routes through the building left open and work section by section so the rest of the building stays in use. For a town like Alton, we try to group jobs for the same client into one visit. Tell us when the building is open and we’ll plan to suit.

  1. We read the specification, drawings or penetration schedule you send and raise any questions before we price.
  2. On site, each opening is checked against the tested detail it is meant to follow.
  3. Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
  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. If an opening needs something other than sealant, we tell you instead of improvising.

Before we start on site

  • Make sure the joints can be reached
  • Have the specification and drawings to hand
  • Tell us which areas need to stay in use

Quotes

Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price against exactly what is specified. For smaller jobs, photos and a description will do.

Get a quick quote

Related advice

Surface by surface

Risers and ceiling voids

Risers and ceiling voids hold most of a building’s service penetrations. Access is often tight, so we agree it with you in advance, including keys, permits and any isolations.

Drylining partitions

Drylined fire walls are tested in a particular build-up. We check that the product’s detail covers that partition type and board thickness first.

What sealant work can’t fix

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

  • Writing the fire-stopping specification
  • Openings that need collars, wraps, batts or boards rather than sealant
  • Fire doors, dampers or other fire safety equipment

If in doubt, call 01277 525 020 or email a schedule or drawings and we will say what we think before you book.

What we seal

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

Service penetrations in Alton buildings

In England, Approved Document B covers fire stopping of 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. What we install is set by the specification, and it goes in to the tested detail. There are several hotels within about 2 miles of Alton. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal.

Wherever services are added at a hospital such as Alton Community Hospital (0.9 miles south-west of Alton) the compartment line has to be made good with the specified product. For a unit at a site such as Kerridge Industrial Estate (less than half a mile north-east of Alton), new power or data runs between office and warehouse can breach a compartment wall.

Alton is about 10 miles south-east of Basingstoke, in Hampshire. Alton sits inside our coverage and the rest of Hampshire, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. 723 places across Hampshire fall within our area, including Alton. For work in that direction, see our Reading page (21 miles or so).

If you need fire stopping in GU34, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Among the streets we cover are High Street, Station Road and Goswell Square. Access to Alton is via the A339 and B3004 among other routes, so getting applicators and materials to site is simple. Just outside Alton, we also work in Chawton (1 mile south-west), Holybourne (2 miles north-east), Neatham (2 miles north-east), East Worldham (2 miles south-east) and Golden Pot (2 miles north). Nearby towns on our patch include Basingstoke (10 miles north-west), Farnborough (13 miles north-east), Fleet (10 miles north-east), Aldershot (11 miles north-east), Petersfield (10 miles south) and Yateley (14 miles north-east).

Around Alton

Around Alton, our work takes us to commercial buildings near Amery Hill School, Treloar School and The 'Baker's Arms' Public House, among other places. Alton has its own railway station: Alton station. Nearby you’ll also find Allen Gallery (less than half a mile east) and Alton Community Hospital (0.9 miles south-west). For a walk, there’s Holybourne Hill.

Map of Alton © OpenStreetMap contributors
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