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

Fire stopping in How Wood

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

  • Unsealed joints where partitions meet the slab
  • Openings left by services added after handover
  • Fire-rated sealant that has cracked or shrunk back
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
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Signed off, with 12 months’ guarantee.
Covering the South East & Scotland
CHAS accredited
£5m public liability

Fire stopping near How Wood

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

About our fire stopping in How Wood

On a fit-out or refurbishment, we follow the services contractors floor by floor. To price a package, give us a call on 01277 525 020 or email us with the schedule or marked-up drawings. Tell us what records you need and we’ll confirm with the quote. Site teams most often ask us about head-of-wall gaps with no fire seal and old intumescent sealant that has split away, across small duct penetrations where the tested detail allows, service gaps in risers and cable penetrations. For commercial sealant work in How Wood, you deal with one contact from quote to sign-off, whether it’s one building or several.

Buildings in a smaller place such as How Wood that need fire-rated sealing are typically schools, care homes, surgeries, small offices and flats over shops. Specified fire-rated sealant goes around new services there, built to match the manufacturer’s detail.

Every job we finish is backed by a 12-month workmanship guarantee, in How Wood as everywhere else we work. If our installation lets you down in that time, we return and fix it.

Where
How Wood (AL2)
Region
Hertfordshire
Cover
A 12-month guarantee
Price
A fixed quote before we start
Phone
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

How the quote is worked out

There’s no standard rate for sealant work, since sites vary so much. What we look at:

  • Access and working height
  • The total length or number of joints
  • Location, for remote and island sites
  • How much existing material needs removing

The product called for affects the cost, and so does the preparation, such as cutting out, priming or new backing rod. Access, phasing and site rules also count.

Before you send an enquiry

We can often quote from photographs and a few details. It helps to include:

  • Photos of the joints, close up and from further back
  • When you need the work done
  • What the building is and how it’s used
  • Asbestos survey details if the building is older

Tell us about the building, the joints and when you need the work done, and we will put a fixed quote together. The easiest way is to give us a call on 01277 525 020 or send details through our quote form.

Diagnose, treat, sign off

A typical day starts with protection: masking tape along the joint edges and sheeting over anything nearby. The work itself usually takes a single visit for a short list of penetrations, or a phased programme for a whole building, and our waste is bagged and taken away as we go. For a job in How Wood, the main thing is a clear picture of the work, so send photographs of each area. A fixed quote follows.

  1. We ask for the product and detail your designer has specified.
  2. Openings are measured and grouped by detail.
  3. Old or wrong materials are cut out.
  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.

Preparing the site

  • For older buildings, check the asbestos register before work
  • Let us know about inductions and permits
  • Have the specification and drawings to hand

Ask for a quote

Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we’ll return a fixed quote you can plan around. If you have questions first, ring 01277 525 020 or email drawings and photos.

Get a quick quote

Advice

Fire stopping in How Wood: the local picture

Central London is about 19 miles from How Wood. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls. How Wood has three care or nursing homes no more than 2 miles away. Where new services have gone through compartment walls in a care setting, the gaps need the specified product.

At a healthcare site like Kingsley Green Hospital (2.2 miles south-east of How Wood), new services through compartment walls are a constant, and each needs the specified seal. Offices at parks like North Orbital Commercial Park, 1.8 miles to the north-east of How Wood, are re-cabled with each new tenant, and compartment walls need sealing afterwards to the tested detail.

How Wood is about 2 miles south-west of St Albans, in Hertfordshire. We send applicators to How Wood for service penetrations, handled exactly as we handle every other area. How Wood is one of 371 places we cover in Hertfordshire for service penetrations. London is covered too, some 19 miles away.

Work on service penetrations is covered throughout AL2, for business premises of every kind. We cover commercial and managed buildings on Ringway Road, Alder Close and How Wood. Close to How Wood, our area also takes in Park Street (1 mile north-east), Chiswell Green (1 mile north-west), Frogmore (1 mile east), Bricket Wood (1 mile south-west) and Colney Street (1 mile south-east). Further afield, our area takes in Watford (4 miles south-west), Hemel Hempstead (5 miles north-west), Stevenage (15 miles north-east), Welwyn Garden City (9 miles north-east), Harpenden (7 miles north) and Hoddesdon (15 miles east).

Local landmarks in How Wood

Recent enquiries here include premises near Marlborough Science Academy and The Falcon pub. There’s a railway station in How Wood itself: How Wood station. Well-known places in the area include Hilfield Castle (4.6 miles south) and Hypocaust Museum (2.1 miles north). The countryside around How Wood includes Broad Colney Lakes and Verulamium Lake.

Map of How Wood © OpenStreetMap contributors

How Wood: questions and answers

Do you work in occupied care homes around How Wood?

Yes. We agree rooms and times with the manager and work a few areas at a time. We follow the home’s own procedures throughout.

Is North Orbital Commercial Park, near How Wood, within your area?

Yes. Our area takes in How Wood and its surroundings, with estates and business parks such as North Orbital Commercial Park included. Photos and a short description are enough for a first look.

Will you write the fire-stopping specification?

No. Deciding what is needed sits with the designer, fire engineer and building control. Our role is fitting the specified fire-rated sealant, following the maker’s tested details.

How soon can the area be used again?

The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.

Can you quote from photos?

Photos, drawings or a schedule are often enough to quote. Where they aren’t, we arrange a site visit.

Can you handle several sites?

Yes. A group of buildings can go on one quote, with one point of contact.

When is resealing likely to be due?

It depends on movement, UV and weather, cleaning, traffic and the product. Treat them as maintenance items and inspect them regularly.

When to call us in How Wood

On a busy project, programme pressure can mean fire stopping is rushed or left to whichever trade is closest. That is when untested combinations creep in.

Things that normally lead to an enquiry:

  • Fire-stopping items raised at inspection or handover
  • Service penetrations left open after M&E works
  • Non-fire-rated filler around services
  • Hidden openings found during inspections

Hotels such as Mercure Noke Hotel St Albans (0.6 miles west of How Wood) rely on fire-resisting walls between bedrooms and corridors, and refits that add services leave penetrations to seal where fire-rated sealant is specified.

Questions to ask before you book

  • Proof of insurance
  • Which product they’ll use, and why it suits the joint
  • Their plan for phasing and protecting the area
  • Are they CHAS accredited or on Constructionline?

Questions to ask before you appoint anyone

How the job changes by surface

Metal pipes

Sealant details often cover copper and steel pipework. The tested detail sets the pipe size range, gap, depth and whether insulation can stay on and we confirm each before sealing.

Cables and cable bundles

Single cables and small bundles are often within a fire-rated sealant’s tested detail. Bundle size, cable type and the space between cables all matter and we work within those limits.

Honest limits

Part of a good diagnosis is knowing where sealant stops. We will tell you if the real problem is one of these:

  • Reviewing a building’s overall fire safety
  • Openings that need collars, wraps, batts or boards rather than sealant
  • Signing off or certifying a building’s fire stopping

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

Where we work in How Wood

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

Why deal with it now?

An unsealed opening affects more than fire safety: they also carry noise, draughts and smells between rooms. Sealing them to the specified detail deals with the fire risk first, and the other benefits follow. In a smaller place such as How Wood, getting a contractor back for a second visit takes time, so it’s worth dealing with every failing joint at once.

Small jobs and large programmes are priced from the same things: scope, access, product and programme. Call for a quote and we’ll put a fixed figure on it.

Why clients in How Wood choose us

  • Products installed to the manufacturer’s instructions
  • One number for every site we cover
  • Sealing commercial buildings since 2005
  • A Constructionline member, so easy to vet

Read how commercial sealant jobs are priced or how we’re accredited.

Accreditations

Trusted. Accredited. Insured.