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

Fire Stopping in Downton

Fire stopping for Downton, from a contractor working since 2005. Fully insured and CHAS accredited.

  • Fire sealant pulled out of the opening
  • Penetration schedules that need working through
  • Fire seals cut back for extra cables and never reinstated
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
South East, London & Scotland
CHAS accredited
£5m PL insurance

Fire stopping for Downton sites

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

When it isn’t the sealant

We check first that sealant really is the fix. It won’t put right:

  • Signing off or certifying a building’s fire stopping
  • Construction that lacks the fire resistance the seal relies on
  • Openings that need collars, wraps, batts or boards rather than sealant

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

Where we work in Downton

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

Fire stopping for commercial buildings in Downton

Opened ceilings and riser doors often reveal service openings nobody sealed. Where the walls and floors already have a fire-stopping specification, we can work to it, matching the product and detail it names. With no specification in place, the first step sits with your designer or fire engineer, not with us. The enquiries we see most involve builders’ foam or ordinary silicone in compartment walls and seals disturbed by maintenance and left open, across service gaps in risers, small duct penetrations where the tested detail allows and joints between fire-resisting walls and floors. Facilities teams, main contractors and managing agents in Downton tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

Barn and farm-building conversions near places like Downton 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.

Every job we finish is backed by a 12-month workmanship guarantee, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.

The Mastic Doctor team beside their liveried vans in front of an office building
Where
Downton (SO41)
Wider area
Hampshire
Guarantee
12 months on our workmanship
Quote
Fixed quote, scope in writing
Phone
01277 525 020
Page updated
3 November 2026

Why act early in Downton

It is cheaper to seal service penetrations as each services package finishes than to come back for them later. While the area is still open, every opening is easy to see and reach and each detail can be checked as we go. One visit to deal with every failing joint makes more sense than several trips to a place like Downton. Send photos of each area and we will quote for the lot.

The product called for affects the cost, as does the preparation each joint needs, such as cutting out, priming or new backing rod. Access, phasing and site requirements come into it too.

Why clients in Downton choose us

  • Fully insured, including public liability cover
  • Work carried out by CSCS-carded applicators
  • Constructionline member
  • Health and safety: CHAS accredited

See what affects the cost or how we’re accredited.

Commercial clients in Downton

We work for building owners and managing agents on everything from one building to a spread of sites. One quote can cover more than one site, which keeps the paperwork simple.

For main contractors, we work as the sealant subcontractor, on new build and refurbishment alike. Programme, specification and site rules come first, with CSCS-carded applicators on site.

Fire stopping around Downton: what changes locally

Five care or nursing homes sit less than 2 miles from Downton. Where new services have gone through compartment walls in a care setting, the gaps need the specified product. Where that’s fire-rated sealant, we install it to the manufacturer’s tested detail. 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. Our part stays the same: the specified product, installed to its tested detail.

For a hospital such as Lymington New Forest Hospital, which lies north-east of Downton, penetration sealing is typically phased ward by ward, with infection-control rules agreed first. Industrial units on estates such as Gore Road Industrial Estate (2.4 miles west of Downton) often separate offices from warehouse space with fire-resisting walls, and new services through them need the specified seal.

Downton is about 3 miles west of Lymington, in Hampshire. Any commercial site in Downton is covered, whether it’s a single job or part of a planned programme. Downton is one of 723 places in Hampshire on our list. Our Southampton page has more on work in that area.

Work on service penetrations is covered throughout SO41, whatever the building. If your site is on Hordle Lane and Shorefield Road or close by, we can quote for service penetrations. We also cover Leagreen (1 mile east), Hordle (1 mile north), Ashley (2 miles north-west), Barton on Sea (2 miles west) and New Milton (2 miles north-west) for service penetrations. A short drive away, we cover Totton (13 miles north), Lymington (3 miles east), Hythe (13 miles north-east), Ringwood (10 miles north-west), Dibden Purlieu (12 miles north-east) and Marchwood (13 miles north-east).

What’s near Downton

We work on buildings around The Arnewood School. Downton’s nearest station is New Milton station, about 2 miles north-west. A little further out are Lymington New Forest Hospital (3.7 miles north-east) and Sammy Miller Motorcycle Museum (2.9 miles north-west). For a walk, there’s Milford on Sea LNR.

Map of Downton © OpenStreetMap contributors

Doing it in-house

What you see is the finished bead, but most of the work is hidden. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.

Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.

How a job runs

We follow your site rules from the start: sign-in, induction and whatever permit system the building uses. Once we are cleared to begin, the joints are worked through in the order agreed with your site contact. Jobs in and around smaller places like Downton are typically planned as a single visit, so we ask for photographs and rough sizes first. Then the right materials arrive with us.

  1. First we confirm the product and tested details named in the specification.
  2. Openings are measured and grouped by detail.
  3. Improvised fillers and failed sealant are removed.
  4. Where the detail needs backing, it goes in at the stated depth.
  5. We gun the sealant in to the specified depth around each service and tool it.
  6. Completed areas are checked with you, with the records agreed when we quoted.

Before we start on site

  • Share the asbestos register for older buildings
  • Warn occupants and staff about the work
  • Point out any areas we must not close

Getting a fixed quote

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.

Get a price

Advice

FAQs: Downton

Can you work in a care home near Downton with residents in?

Yes. We agree rooms and times with the manager and work a few areas at a time. Noise and disruption are kept to a minimum.

Is hospital work, at somewhere like Lymington New Forest Hospital, something you do?

Yes, provided the work is planned with the site’s estates team. We follow the site’s permits, sign-in and infection-control procedures in every area.

How long does a typical visit take?

It depends on the scope, but the work normally takes anything from one day to a planned run of visits, depending on the number of seals and the access. For bigger or phased jobs, we will set out a timescale with the quote.

Do you cover Downton?

Yes. We take on work across Downton.

How do you deal with asbestos in old sealant?

Managing asbestos is the dutyholder’s responsibility, so we’ll ask for the register before work on an older building. If anything suspect turns up, we stop until it’s tested.

Do you take on multi-site work?

Yes. We take on portfolio and planned maintenance work, with each site phased to suit its occupants.

Can you quote from photos?

It depends on the job. Simple work can often be priced from photographs, and bigger or more complex jobs typically get a visit.

Do you need fire stopping in Downton?

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.

Most enquiries start with something like this:

  • Non-fire-rated filler around services
  • Improvised or mixed-product fire seals
  • Seals disturbed by maintenance and left open
  • Fire-stopping items raised at inspection or handover

Hotels like South Lawn Hotel (1.3 miles east of Downton) are refurbished in phases, and each phase can open up compartment walls.

Before you book anyone

  • How long is the guarantee, and what does it include?
  • What level of public liability insurance do they hold?
  • Whether primer will be used where the manufacturer specifies it
  • How they’ll work around occupants

Choosing a commercial sealant contractor

Accreditations

Trusted. Accredited. Insured.