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

Fire-rated sealing and fire stopping in Calshot, Hampshire

Commercial sealant work in Calshot for contractors, FMs and building owners: fire-rated and intumescent sealing of service penetrations and linear gaps, quoted at a fixed price.

  • Penetration schedules that need working through
  • Openings found when ceilings come down for a refit
  • Openings left by services added after handover
1
Send details
Send the specification, photos or a marked-up plan.
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
12-month guarantee on our workmanship.
London, the South East & Scotland
CHAS & Constructionline
£5m PL insurance

Fire stopping across Calshot

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

What we are called out for in Calshot

Linear gaps fail where a fire-resisting wall meets a slab, soffit or another wall. Movement in the frame or slab can open the joint, and the wrong product can split as a result. The tested detail for a linear joint states the width and movement it covers.

Site and facilities staff are often the first to spot these:

  • Open linear gaps along the top of fire-resisting walls
  • Penetration schedules that need working through
  • Builders’ foam or ordinary silicone in compartment walls
  • Hidden openings found during inspections

In a building such as St George, any service penetration through a fire-resisting wall should be sealed to the specified detail.

What your quote should include

  • What site paperwork they can supply
  • Their public liability cover
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?
  • What the guarantee covers, and for how long

Our contractor checklist

Fire stopping in Calshot, done properly

Sealant is the specified answer for plenty of openings, such as metal pipes, cables and some small ducts where the detail covers them. Other openings need collars, wraps, batts, pillows or boards. We use sealant where it is the specified product, and we tell you when a detail calls for something else. If you have hidden openings found during inspections and old intumescent sealant that has split away, we can help, whatever the surface. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Calshot, preparation and product choice get the time they need.

Smaller places such as Calshot still have buildings with fire-resisting walls and floors: schools, halls, care homes and commercial conversions. If sealant is what the specification names, we install it around the services exactly as the maker’s detail sets out.

The 12-month guarantee is for workmanship rather than 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.

The Mastic Doctor team standing beside their branded vans outside an office building
Where
Calshot (SO45)
Wider area
Hampshire
Guarantee
12 months on every job
Quotes
Quoted before any work starts
Telephone
01277 525 020
Updated
3 November 2026

On site: what to expect

Tell us your site hours and access windows and we will plan around them. On the day, the work area is kept contained and tidy, and we check in with your contact before moving on to each new area. Rural sites near Calshot may need directions, gate codes or a contact on site. Send that with the details and we’ll confirm the plan with the quote.

  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. Foam, ordinary sealant and debris come out 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.

Preparing the site

  • Point out any areas we must not close
  • Let us know about inductions and permits
  • Confirm the product named in the specification

Getting a fixed quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, ring 01277 525 020 or email a schedule or drawings.

Ask for a quote

Read more

Maintenance after handover

Keep the joints in good shape with a few simple steps:

  • Don’t let anyone top up a fire seal with the wrong product
  • Include service cupboards in routine inspections
  • Ask which product is in place before decorating
  • Report damaged or disturbed seals as soon as they’re spotted

Keep the product data and installation details with the building’s fire safety information. It makes later repairs much easier to match.

Looking at service areas on a regular cycle pays off. Catching a damaged seal early keeps the fix small.

Fire stopping around Calshot: how the place shapes the job

In England, Approved Document B covers fire stopping of openings and penetrations. References to the older BS 476 classes are being removed from it from 2 September 2029, after which the European classification, BS EN 13501-2, is the route, subject to transitional arrangements. What we install is set by the specification, and it goes in to the tested detail.

For a hospital such as Coldeast (4.5 miles north-east of Calshot), penetration sealing is normally phased ward by ward, with infection-control rules agreed first. For a hotel such as Falcon Hotel, 1.4 miles north-west of Calshot, penetration seals are worth checking after any refit or services upgrade.

Calshot is about 4 miles north of Cowes, in Hampshire. If you’re looking for fire stopping in Calshot, we can help, as we do across Hampshire. Our Hampshire coverage takes in 723 places, large and small. Our Southampton page has more on work in that area.

We take on service penetrations across the SO45 postcode area, for business premises of every kind. Among the streets we cover are Bus Drove, Elmfield Lane and Tristan Close. Just outside Calshot, we also work in Hillhead (1 mile south-east), Sprat's Down (1 mile west), Stanswood (1 mile south-west), Stonehills (1 mile north-west) and Ashlett (1 mile north-west). Nearby towns on our patch include Gosport (8 miles east), Havant (15 miles east), Eastleigh (11 miles north), Fareham (6 miles north-east), Horndean (15 miles north-east) and Totton (11 miles north-west).

Near you in Calshot

The closest station to Calshot is Hamble station, roughly 4.1 miles north of the centre. Well-known places in the area include Calshot Castle (1.1 miles north-east) and Coldeast (4.5 miles north-east). For a walk, there’s Mercury Marshes and Mill Hill.

Map of Calshot © OpenStreetMap contributors

Site staff or a sealant specialist?

There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we will confirm the paperwork you need with the quote.

For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class.

Calshot: questions and answers

Is Calshot off your patch?

No. Small places get the same service as large ones. We work across Greater London and the South East. Send photographs and a list of what needs doing, and we will plan the job to need as few trips as possible.

Would you work within a site like Coldeast?

Yes, provided the work is planned with the site’s estates team. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Do you certify or sign off fire stopping?

No. Approval sits with the designer, principal designer or building control. We will confirm the products and details used.

Can you quote from photos?

Photos, drawings or a schedule are often enough to quote. Where they aren’t, we arrange a site visit.

How long will the new sealant last?

There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.

How long does a job like this take?

That varies with the scale of the job, 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.

Is it fine to apply new sealant on top of old?

No, never. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.

Building owners, agents and FMs in Calshot

Housing associations and managing agents often need work done across blocks and communal areas. We phase the work so people keep access, and each stage is agreed with your contact.

If you look after buildings for someone else, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.

Quoting for work in Calshot

Quotes vary with the job. It mainly depends on:

  • Quantities, in metres or numbers
  • Working within restricted access windows
  • Whether old sealant has to be cut out first
  • Specialist products, such as fire-rated or hygienic sealants

Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you will have a fixed figure to work with.

Before you send an enquiry

Diagnosis starts before we arrive. Let us know:

  • Where the site is, with the postcode
  • Approximate linear metres or a joint schedule
  • The product your specification calls for
  • Anything awkward about access or site hours

Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. The easiest way is to ring 01277 525 020 or send details through our quote form.

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