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

Bagmore fire stopping

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

  • Old intumescent sealant that has split away
  • Expanding foam used as fire stopping
  • Openings found when ceilings come down for a refit
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS & Constructionline
£5m PL insurance

Fire stopping near Bagmore

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

How we handle fire stopping in Bagmore

Where pipes, cables and other services cross a compartment wall or floor, the opening around them has to be closed so fire and smoke can’t move between compartments. Our job is fitting fire-rated and intumescent sealant at those service penetrations, and along linear gaps, where it is the specified product. We work to the product’s tested detail for every seal. We work on linear gaps at wall heads, service gaps in risers and joints between fire-resisting walls and floors, and the usual reasons a site gets in touch are unsealed joints where partitions meet the slab and fire-stopping items raised at inspection or handover. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Bagmore, preparation and product choice get the time they need.

Barn and farm-building conversions near places like Bagmore often combine new partitions with old walls. A penetration seal only performs as tested if product, substrate, service, gap and depth all match the detail.

We stand behind the joints we seal with a 12-month guarantee. That covers our preparation and application, and we come back if anything isn’t right.

The Mastic Doctor team beside their liveried vans in front of an office building
Where
Bagmore (RG25)
Region
Hampshire
Guarantee
12 months on our workmanship
Quote
Fixed quote, scope in writing
Telephone
01277 525 020
Page updated
3 November 2026

FAQs: Bagmore

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

Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes 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 Bagmore too far out for you?

No. Places such as Bagmore are covered as much as the big towns. We cover Greater London and the counties of the South East. Good photos up front let us bring everything on the first visit.

Are you CHAS accredited?

Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.

Can one quote cover more than one building?

Yes. Several buildings can share a single quote, and you deal with one contact throughout.

How long do sealant joints last?

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

What if there’s asbestos in the old mastic?

Asbestos is possible in some older mastics, particularly in buildings from before 2000. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and work stops until any suspect material has been tested. We don’t remove asbestos-containing materials.

How do I request a quote?

The quote form is the simplest route, though you can also phone 01277 525 020 or email us. Include photographs or drawings if you have them.

Maintenance after handover

To get the most from the new sealant:

  • Check risers and ceiling voids after each round of works
  • Ask the designer to confirm details early on refits
  • Put resealing into every M&E and fit-out package
  • Ask which product is in place before decorating

Allow the manufacturer’s stated cure time before boxing in or decorating. Not every fire-rated product can be painted, so check the product data first.

Specify fire stopping early on refits, not as an afterthought. Details can then be picked to suit the actual pipes, cables and ducts.

Doing it in-house

Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.

For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.

Fire-rated sealing for Bagmore buildings

Central London is about 46 miles from Bagmore. Office refits around the commuter belt bring new cabling through fire-resisting walls. Approved Document B is the English guidance that covers fire stopping around 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. Either way, we install the specified product to its tested detail.

Halls and meeting rooms at places like Church of St. Mary sometimes gain new services, and any compartment wall crossed needs the specified seal.

Bagmore is about 5 miles north-west of Alton, in Hampshire. Anywhere in RG25, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Our Hampshire coverage takes in 723 places, from busy centres to rural villages. We also cover Reading, around 18 miles from Bagmore.

Anyone looking for fire stopping in RG25 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. Nearby places we also cover include Southrope (1 mile east), Burkham (1 mile south-west), Shalden Green (2 miles east), Bradley (3 miles south-west) and Bentworth (3 miles south). Further afield, our area takes in Basingstoke (5 miles north-west), Winchester (15 miles south-west), Farnborough (14 miles north-east), Fleet (11 miles north-east), Aldershot (13 miles east) and Alton (5 miles south-east).

Near you in Bagmore

The nearest railway station is Alton station, roughly 4.9 miles south-east of the centre. Well-known places in the area include Alton Community Hospital (4.9 miles south-east) and Gliding Heritage Centre (1.6 miles south-east). Green spaces nearby include Farleigh Hill.

Map of Bagmore © OpenStreetMap contributors

Work for main contractors and building owners

FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.

When you manage a building on behalf of an owner, 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.

When to call us in Bagmore

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 what we find most often.

Common reasons buildings call us in:

  • Open linear gaps along the top of fire-resisting walls
  • Damaged fire seals in risers and voids
  • Hidden openings found during inspections
  • Fire stopping installed outside its tested range

Wherever services are added at a hospital such as Alton Community Hospital (to the south-east of Bagmore) the compartment line has to be made good with the specified product.

What to look for in a quote

  • How they’ll work around occupants
  • Their public liability cover
  • Whether their applicators hold CSCS cards
  • Will RAMS and insurance details be available?

Choosing a commercial sealant contractor

On site: what to expect

Before any cutting starts, the area is protected: masking tape along the joint edges and sheeting over anything nearby. On site, the work typically takes longer where risers, ceiling voids or occupied floors have to be worked through in sequence, and we clear our waste as we work. Smaller jobs around Bagmore can be grouped with others nearby, which keeps travel down. You’ll have a fixed quote before work starts.

  1. First we go through the drawings, schedule or specification for the seals and ask about anything unclear.
  2. Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
  3. Unsuitable fillers and loose debris are taken out of each opening.
  4. Mineral wool or other backing goes in wherever the detail asks.
  5. We apply the specified sealant to the depth and around the services as the detail shows.
  6. If an opening needs something other than sealant, we tell you instead of improvising.

What we need from you

  • Share the asbestos register for older buildings
  • Arrange parking or a loading space
  • Let building users know which areas are affected

Quotes

A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we’ll arrange a site visit if anything is unclear.

Get a quick quote

Read more

When something else is needed

Some faults sit outside our scope, and we say so rather than covering them up:

  • Writing the fire-stopping specification
  • Signing off or certifying a building’s fire stopping
  • Plastic pipes whose detail calls for a collar or wrap

If you’re not sure, just speak to us on 01277 525 020 or email the details over and we’ll give you a straight answer before you book.

Joints and surfaces we work on

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

Trusted. Accredited. Insured.