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

Fire-rated sealing and fire stopping in Otterbourne, Hampshire

Fire-rated and intumescent sealing of service penetrations and linear gaps throughout Otterbourne and nearby, by CSCS-carded applicators. CHAS accredited and fully insured.

  • Non-fire-rated filler around services
  • Openings found when ceilings come down for a refit
  • Old intumescent sealant that has split away
1
Send details
Tell us about the site, with photos if you have them.
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 accredited
£5m PL insurance

Fire stopping in Otterbourne

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

Fire stopping for commercial buildings in Otterbourne

It helps to set out our role at the start. Deciding the specification sits with the designer, the fire engineer and building control. What we bring is careful installation of the specified sealant, to the maker’s guidance on buildings around Otterbourne. If you have non-fire-rated filler around services and seals that don’t match their tested detail, we can help. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Otterbourne is the same: the right product in a properly prepared joint.

Barn and farm-building conversions near places like Otterbourne 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.

Our workmanship is guaranteed for 12 months. If our installation lets you down in that time, we return and fix it.

The Mastic Doctor team standing beside their branded vans outside an office building
Place
Otterbourne (SO21)
Region
Hampshire
Cover
A 12-month guarantee
Price
Quoted before any work starts
Call
01277 525 020
Page updated
3 November 2026

Why act early in Otterbourne

A seal that doesn’t match its tested detail gives false comfort. Correcting it means cutting it out and starting again with the specified product. Older rural buildings around Otterbourne move with the seasons, and rigid or tired sealant can’t keep up. The right product, sized to the joint, copes much better.

The price depends on how many linear metres there are, how much old material needs removing and how the joints are reached. Call for a fixed quote when you are ready.

Why appoint us

  • Constructionline member
  • Workmanship guaranteed for 12 months
  • One number for every site we cover
  • Old sealant cut out, never sealed over

Read how commercial sealant jobs are priced or our accreditations.

Quoting for work in Otterbourne

Sealant work doesn’t have a standard rate, since sites vary so much. What we take into account:

  • Induction, permit and paperwork requirements
  • Backing rod, priming and other preparation
  • How accessible the joints are
  • Location, for remote and island sites

Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.

What to include in your enquiry

The more we know, the firmer the quote. When you get in touch, include:

  • How the joints are reached, and at what height
  • Drawings or a marked-up plan, if available
  • Any dates the work must fit around
  • Whether the building will be occupied during the work

Every quote starts with the facts: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.

When it isn’t the sealant

Sealant solves a lot, but not everything, and we’d rather tell you before you spend money. It won’t fix:

  • Reviewing a building’s overall fire safety
  • Construction that lacks the fire resistance the seal relies on
  • Approving the work on behalf of building control

If in doubt, give us a call on 01277 525 020 or email a schedule or drawings and we will say what we think.

Joints and surfaces we work on

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

After the work

Once the work is signed off, these steps help:

  • Record which product was used where
  • Include service cupboards in routine inspections
  • Agree the fire-stopping specification before services go in
  • Leave fire sealant to cure fully before covering it

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

Make reporting new openings part of every permit to work in service areas. Small habits like this stop openings building up.

From enquiry to sign-off

The first thing on site is a walk round with your contact, to confirm the scope, the order of work and any areas we must keep clear. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. For work around Otterbourne, we aim to finish in one visit, so photographs and measurements up front really help. Then the right materials arrive with us.

  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. We apply the specified sealant to the depth and around the services as the detail shows.
  6. Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.

Getting the site ready

  • Tell us your opening times and when work is allowed
  • Agree which areas must stay open
  • Send any specification or drawings in advance

Ask for a quote

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, call the office on 01277 525 020 or email a schedule or drawings.

Ask for a quote

Advice

Fire stopping around Otterbourne: how the place shapes the job

Central London is about 64 miles from Otterbourne. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls; the gaps need the specified seal. Fire stopping of openings and penetrations in England falls under Approved Document B. 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. We install whatever has been specified, to the product’s tested detail.

For a unit at a centre such as Cannons Retail Park, 2.7 miles south-west of Otterbourne, penetration seals are worth checking after each shop fit. In a building such as Church of St Matthew, any service penetration through a fire-resisting wall should be sealed to the specified detail. At a healthcare site like Wessex Hospital (1.1 miles south-west of Otterbourne), new services through compartment walls are a constant, and each needs the specified seal.

Otterbourne is about 3 miles north-east of Chandler's Ford, in Hampshire. Otterbourne sits inside our coverage, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. We work across 723 places in Hampshire, large and small. There’s a separate page for Southampton, about 7 miles away.

Work on service penetrations is covered throughout SO21, for business premises of every kind. Buildings on Oakwood Avenue, Meadowcroft Close and Brooklyn Close are within our area. Just outside Otterbourne, we also work in South Down (1 mile north-east), Compton (1 mile north), Shawford (1 mile north-east), Twyford (1 mile north-east) and Ladwell (2 miles west). Further afield, our area takes in Winchester (4 miles north), Eastleigh (3 miles south), Fareham (13 miles south-east), Andover (15 miles north-west), Totton (9 miles south-west) and Chandler's Ford (3 miles south-west).

Around Otterbourne

Recent enquiries here include premises near Thornden School, The White Horse Public House and Thornden School, among other places. The nearest railway station is Shawford station, about 1.1 miles north-east of the centre. Well-known places in the area include Eastleigh Museum (2.9 miles south) and Wolvesey Castle (3.8 miles north). Green spaces nearby include Twyford Down and Shawford Down.

Map of Otterbourne © OpenStreetMap contributors

Work for main contractors and building owners

When you manage a building on behalf of an owner, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.

We take on planned maintenance as well as one-off repairs: working through a building or an estate in stages that fit your budget. Otterbourne can form part of a wider programme across Hampshire.

Questions about Otterbourne

Can you work around term dates at a campus such as University of Winchester?

Yes. We plan campus work around teaching, exams and residence turnarounds. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

Is Otterbourne too small for you to travel to?

Not at all. Otterbourne is within our area. Our area covers London and the South East counties. Where we can, we group nearby jobs to make the most of each trip.

Are you members of a third-party fire-stopping installer scheme?

No. We don’t hold a third-party fire-stopping installer certificate. Our credentials are CHAS accreditation, Constructionline membership and CSCS-carded applicators, and we are fully insured. Where a client or main contractor requires a scheme member, we will say so right away rather than waste your time.

What do you charge?

It depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a quote and we’ll price it properly.

What’s the quickest route to a quote?

It works in four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. Step one needs little more than photographs and a postcode.

Is the work guaranteed?

Yes. Our workmanship is backed for 12 months.

Can you reseal penetrations after our M&E works?

Yes. Share the penetration schedule and product details for a fixed quote. Work can run area by area behind the M&E trades so areas aren’t left open.

Accreditations

Trusted. Accredited. Insured.