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

Fire-rated sealing and fire stopping in Kentsboro, Hampshire

Commercial sealant work in Kentsboro for contractors, FMs and building owners: fire-rated and intumescent sealing of service penetrations and linear gaps, with a fixed quote first.

  • Fire stopping installed outside its tested range
  • Hidden openings found during inspections
  • Fire-rated sealant that has cracked or shrunk back
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.
Covering the South East & Scotland
CHAS accredited
£5m public liability

Fire stopping in Kentsboro

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

Fire stopping in Kentsboro

It helps to set out our role at the start. Deciding the specification sits with the designer, the fire engineer and building control. We fit the specified fire-rated sealant following that specification and the maker’s installation guidance on buildings around Kentsboro. The enquiries we see most involve openings left by services added after handover and seals that don’t match their tested detail, on linear gaps at wall heads, cable penetrations and joints between fire-resisting walls and floors. Whoever orders the work in Kentsboro, the brief is typically the same: a clear scope, tidy work and joints that don’t fail again.

Barn and farm-building conversions near places like Kentsboro often combine new partitions with old walls. Where a pipe or cable passes through a fire-resisting wall, the seal must match the tested detail: product, substrate, gap and depth.

Whoever the client is, the cover is the same: a 12-month guarantee on our workmanship. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.

Place
Kentsboro (SO20)
Wider area
Hampshire
Guarantee
A 12-month guarantee
Price
Quoted before any work starts
Telephone
01277 525 020
Page updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

What happens if it’s left?

Leave a penetration open and smoke and fire can cross into the next compartment far earlier than intended. Putting it right is typically a modest job when the openings are accessible. Left until ceilings are closed or a tenant moves in, the same work costs more access and more disruption. Converted and older buildings near places like Kentsboro tend to move, and aged sealant cracks. A sealant with the right movement capability, correctly sized, lasts far better.

Cost follows what’s involved: stripping out, preparation, sealing, access and phasing. Call for a fixed quote and we will explain how it’s made up.

Why us?

  • Old sealant cut out, never sealed over
  • Over 20 years of commercial sealing
  • Constructionline member
  • Products installed to the manufacturer’s instructions

Take a look at what affects the cost or our accreditations.

Questions we’re asked in Kentsboro

How does the move away from BS 476 affect penetration seals in Kentsboro?

References to BS 476 classes are being removed from Approved Document B from 2 September 2029, after which BS EN 13501-2 classification is the route, subject to transitional arrangements. The designer or fire engineer sets the specification, and we install the product to the manufacturer’s tested detail.

Is Kentsboro too far out for you?

Not at all: smaller places are covered as well as towns. We work across Greater London and the South East. Send photographs and a list of what needs doing, and we’ll plan the job to need as few trips as possible.

What hours do you work?

We are in the office from 8am until 5pm, Monday to Friday. Tell us your site hours and access windows and the work will be fitted around them.

Can weather delay the job?

It can, when the joints are outside. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so we watch the forecast and rearrange outside work if we have to. Internal work is far less affected.

Is colour matching possible?

That depends on the product specified. Some ranges are wide, others limited, so the available colours are confirmed with the quote.

Is any job too small?

We quote for single jobs as well as large packages and programmes. Photos and a description are enough to start.

How long before the joints can be used?

We will confirm how long the chosen product needs to cure.

What affects the price in Kentsboro

The price varies from site to site. Expect it to depend on:

  • Specialist products, such as fire-rated or hygienic sealants
  • Any access equipment needed
  • Location, for remote and island sites
  • Removal of failed or old sealant

Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you’ll have a fixed figure to work with.

What we need to price the job

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

  • Drawings or a marked-up plan, if available
  • How the joints are reached, and at what height
  • Whether an asbestos survey exists
  • Photos of the joints, close up and from further back

For a fixed quote, give us a call on 01277 525 020 or email us, telling us the site location and the nature of the job. You can also send details through our quote form.

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 along with any permits your site needs.

Plastic pipes

In a fire, plastic pipework melts away and leaves an opening. Some intumescent sealants are tested on smaller plastic pipes. We confirm material and size first and tell you if sealant isn’t the right product.

Looking after the joints

Cleaning and maintenance staff play a part too. Share these points with them:

  • Get seals inspected before ceilings and boxing close
  • Leave fire sealant to cure fully before covering it
  • File the specified details where the next contractor can find them
  • Settle who seals which penetrations at the start of a project

After every round of M&E works, check that the openings created have been sealed. A short check at the end of each job saves a long hunt later.

Regular walk-rounds of service areas are worth the time. A cracked or disturbed seal found early is a small job.

Site staff or a sealant specialist?

For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.

On site: what to expect

We schedule the visit to fit the site hours and access windows you give us. 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. For a building around Kentsboro, tell us how to find it and who will meet us. Add it to your enquiry and we’ll build it into the plan.

  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.

What we need from you

  • Let us know about inductions and permits
  • Send any specification or drawings in advance
  • Clear stock, furniture or equipment away from the joints

Quotes

Pricing a project or setting a maintenance budget? We’ll quote against your scope and drawings you can plan around. If you have questions first, speak to us on 01277 525 020 or email drawings and photos.

Ask for a quote

Related advice

Compartment walls and floors in Kentsboro

Kentsboro lies roughly 68 miles out from central London. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls. In England, Approved Document B covers fire stopping of openings and penetrations. The national BS 476 classes are due to drop out of it from 2 September 2029, leaving the European BS EN 13501-2 route, subject to transitional arrangements. We install whatever has been specified, to the product’s tested detail.

For buildings in and around Kentsboro, fire-rated sealant is installed where it is specified, to the manufacturer’s tested detail. At a healthcare site like Andover War Memorial Hospital (5 miles north-east of Kentsboro), new services through compartment walls are a constant, and each needs the specified seal.

Kentsboro is about 5 miles south-west of Andover, in Hampshire. We cover Kentsboro, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Across Hampshire, 723 places are covered, Kentsboro among them. Sites around Southampton have their own page, about 18 miles away.

Business premises anywhere in SO20 are within our area for service penetrations. Buildings on Mead Park Square, Upper Mead and Lower Mead are within our area. Sites close to Kentsboro are covered too, including Over Wallop (2 miles south-west), Middle Wallop (2 miles south-west), Nether Wallop (2 miles south), Fox (2 miles north) and Red Rice (2 miles north-east). A short drive away, we cover Winchester (13 miles south-east), Andover (5 miles north-east), Chandler's Ford (14 miles south-east), Romsey (12 miles south), Hyde (12 miles south-east) and Tidworth (7 miles north-west).

Around Kentsboro

The nearest railway station is Grateley station, roughly 2.6 miles west. Well-known places in the area include Andover War Memorial Hospital (5 miles north-east). For a walk, there’s Quarley Hill and Mill Lake.

Map of Kentsboro © OpenStreetMap contributors
Accreditations

Trusted. Accredited. Insured.