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

Fire stopping in Merrow

Looking for fire stopping in Merrow? It’s simple: send details, get a quote, we seal, guaranteed.

  • Seals disturbed by maintenance and left open
  • Snag lists that include open service penetrations
  • Expanding foam used as fire stopping
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
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
South East, London & Scotland
Constructionline member
£5m public liability

Fire stopping for Merrow sites

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

About our fire stopping in Merrow

Penetration seals are fire tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4. A rating such as EI 60 only holds when the product is installed as it was tested. Reproducing the tested arrangement on site is the part we take care of. We work on small duct penetrations where the tested detail allows, pipe penetrations and cable penetrations, and the failures we’re asked to look at most are fire seals cut back for extra cables and never reinstated and hidden openings found during inspections. Most enquiries from Merrow start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.

Fire-rated sealing in a place like Merrow is usually a single building at a time. Send the specification, drawings or photos of the openings and we will quote to suit.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.

Location
Merrow (GU1, GU4)
Wider area
Surrey
Guarantee
12 months on our workmanship
Quote
A fixed quote before we start
Phone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Diagnose, treat, sign off

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 your contact hears from us before we move to the next area. Several jobs near Merrow can be grouped on one trip. Tell us your site hours and we will plan around them.

  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. Unsuitable fillers and loose debris are taken out of each opening.
  4. Mineral wool or other backing goes in wherever the detail asks.
  5. Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
  6. Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.

Preparing the site

  • Have the specification and drawings to hand
  • Share your working hours and any access restrictions
  • Let us know about inductions and permits

Get a fixed quote

Pricing a project or setting a maintenance budget? We’ll quote against your scope and drawings you can plan around. For a chat about it beforehand, call 01277 525 020 or email a schedule or drawings.

Ask for a quote

Related advice

Should maintenance staff do it?

Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong typically costs more in the end than doing them right.

Paperwork matters too. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we will confirm the paperwork you need with the quote.

After the work

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

  • Settle who seals which penetrations at the start of a project
  • Brief every trade that openings they make must be sealed
  • Foam or ordinary sealant is never a fire-seal repair
  • Report damaged or disturbed seals as soon as they’re spotted

Once the seals are in, tell other trades they exist and must not be disturbed. If a seal has to be opened for a new service, it should be reinstated to the same detail, by someone who knows the system.

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

What sets the cost

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

  • The size and state of each joint
  • Working within restricted access windows
  • How accessible the joints are
  • Whether old sealant has to be cut out first

Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.

Before you send an enquiry

There’s no need for a formal survey. These details are enough to start:

  • Photos of the joints, close up and from further back
  • The site address and postcode
  • Drawings or a marked-up plan, if available
  • What the building is and how it’s used

The quickest route to a quote is a few photos and the site postcode. Send them through the quote form, or call the office on 01277 525 020 or email a schedule or drawings to discuss it first.

When something else is needed

A few problems need another trade or a different fix, and we say so rather than covering them up:

  • Openings that need collars, wraps, batts or boards rather than sealant
  • Reviewing a building’s overall fire safety
  • Designing or specifying fire stopping, which sits with the designer or fire engineer

If you’re not sure, just call 01277 525 020 or email a schedule or drawings and we’ll give you a straight answer before you book.

Surfaces we seal

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

Do you need fire stopping in Merrow?

Some service penetrations were never sealed at all, often hidden above suspended ceilings or behind boxing. They come to light during inspections, refits or when another trade lifts a tile.

Most enquiries start with something like this:

  • Seals disturbed by maintenance and left open
  • Non-fire-rated filler around services
  • Penetration schedules that need working through
  • Open linear gaps along the top of fire-resisting walls

Campus buildings at universities such as University of Surrey - Stag Hill Campus, 2.7 miles to the west of Merrow, see constant changes to data and services, and fire-rated sealant goes in around new penetrations where it is specified.

Before you book anyone

  • Health and safety accreditation such as CHAS
  • How they’ll work around occupants
  • Proof of insurance
  • How the existing material will be dealt with

Questions to ask before you appoint anyone

Fire stopping in Merrow: the local picture

There are several hotels within about 2 miles of Merrow. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal. Merrow is about 26 miles from central London. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls; the gaps need the specified seal.

Large healthcare estates like Mount Alvernia Hospital (to the south-west of Merrow) change their services often, so penetration seals are worth checking after M&E work. In a hotel such as Manor House Hotel, which lies south-east of Merrow, new pipework or cabling through bedroom and corridor walls needs sealing with the specified product.

Merrow is about 2 miles east of Guildford, in Surrey. We cover commercial sites throughout Merrow, for single jobs and planned programmes alike. Merrow is one of 379 places in Surrey on our list. Our Reading page has more on work in that area, about 24 miles away.

Business premises anywhere in GU1 and GU4 are within our area for service penetrations. We cover commercial and managed buildings on Park Lane, Grove Road and Wykeham Road and the roads nearby. We also cover Burpham (1 mile north-west), Abbotswood (1 mile west), West Clandon (2 miles north-east), Guildford (2 miles west) and Chilworth (2 miles south). Further afield, our area takes in Woking (5 miles north), Camberley (11 miles north-west), Epsom (13 miles north-east), Farnham (12 miles west), Ewell (14 miles north-east) and Egham (13 miles north).

Near you in Merrow

We work on buildings around St Peter's Catholic School, St Peter's Catholic School and Riverside Park and the streets around them. The nearest railway station is Clandon station, roughly 1.6 miles north-east of the centre. Other landmarks nearby include Guildford Castle (2.1 miles south-west) and Surrey Infantry Museum (0.6 miles north-east). Not far away are St Martha's Hill and Colyer's Hanger and Silent Pool.

Map of Merrow © OpenStreetMap contributors

FAQs: Merrow

Is hospital work, at somewhere like Mount Alvernia Hospital, something you do?

Yes, hospitals are one of the sectors we cover. Work is phased so departments keep running, under the site’s own rules.

Do you seal service penetrations in hotels around Merrow?

Yes, to the specification and the product’s tested detail. We match the product to the wall or floor and the services, and say if something other than sealant is needed.

Do you work to architects’ specifications?

Yes. We follow the specification, along with the manufacturer’s installation guidance, and any queries are raised before we start.

Which sealant will you use?

The specification comes first, if there is one. Without one, the joint decides: its movement, its surfaces and what it has to cope with.

Can you handle several sites?

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

How many days will you need on site?

That varies with the scale of the job, though a typical visit typically takes longer where risers, ceiling voids or occupied floors have to be worked through in sequence. Larger or phased jobs take longer, and we will give you a timescale with the quote.

When can you be on site?

Give us your site hours and any access windows in your enquiry, and we will schedule the work to suit. Our office runs Monday to Friday, 8am until 5pm.

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