Fire stopping in Dunsfold
Fire stopping in Dunsfold, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.
- Fire sealant pulled out of the opening
- Non-fire-rated filler around services
- Openings left by services added after handover
Fire stopping near Dunsfold
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
What affects the price in Dunsfold
Before we quote, we look at:
- Specialist products, such as fire-rated or hygienic sealants
- How accessible the joints are
- Whether the work must be split into stages
- Site requirements such as inductions and permits
Pricing service penetrations depends on how many there are, their condition and the access. Call for a quote.
Sending details for a quote
Whether it’s one area or a whole building, these details speed things up:
- Approximate linear metres or a joint schedule
- When you need the work done
- A wide shot and a close-up of the area
- Any specification or named product
Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, ring 01277 525 020 or use the quote form.
How we handle fire stopping in Dunsfold
Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member. We hold no third-party fire-stopping installer certificate, and we won’t pretend otherwise. What we offer is careful installation of the specified sealant to its tested detail, with a 12-month guarantee on our workmanship. We work on small duct penetrations where the tested detail allows, service gaps in risers and cable penetrations, and the failures we’re asked to look at most are unsealed penetrations discovered above suspended ceilings and snag lists that include open service penetrations. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Dunsfold is the same: the right product in a properly prepared joint.
A job near Dunsfold is normally planned around one visit, with the specification and photos sent in advance. Design and sign-off belong to the designer or building control; we install what’s specified.
Our workmanship is guaranteed for 12 months. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Place
- Dunsfold (GU8)
- Region
- Surrey
- Cover
- A 12-month guarantee
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Keeping the joints sound
For the best life from the joints:
- Check risers and ceiling voids after each round of works
- Keep general-purpose fillers away from compartment walls
- Agree the fire-stopping specification before services go in
- Treat an open penetration as a priority repair
During planned inspections, look at seals in risers, cupboards and voids. Look for cracks, unsealed new cables and gaps that have been enlarged, and report them promptly.
Write fire stopping into the scope of any work crossing a compartment wall or floor. Then the seal goes in while the area is open.
Owners, agents and contractors
Agents, factors and owners’ representatives all follow the same route: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.
Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, with each stage agreed with your site contact.
What the job involves on each surface
Linear joints
Head-of-wall gaps, slab edges and wall junctions are linear joints. Their tested detail, under BS EN 1366-4, sets the width, depth, backing and movement allowed and the installation has to fit inside those limits.
Masonry and concrete
Block walls and concrete floors are common substrates for penetration seals. Dust and debris are cleared from the opening, with backing added if the detail requires it.
Where services cross fire walls in Dunsfold
Dunsfold lies roughly 33 miles out from central London. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls. Approved Document B is the English guidance that covers fire stopping around 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. We install whatever has been specified, to the product’s tested detail.
Industrial units on estates such as Littlemead Industrial Estate (3 miles north-east of Dunsfold) often separate offices from warehouse space with fire-resisting walls, and new services through them need the specified seal. Halls and meeting rooms at places like Church of St Mary and All Saints sometimes gain new services, and any compartment wall crossed needs the specified seal. At a healthcare site like Milford Hospital, which lies north-west of Dunsfold, new services through compartment walls are a constant, and each needs the specified seal.
Dunsfold is about 9 miles south of Guildford, in Surrey. We send applicators to Dunsfold for service penetrations, handled exactly as we handle every other area. Dunsfold is one of 379 places in Surrey on our list. Our Brighton page has more on work in that area (27 miles or so).
Anyone looking for fire stopping in GU8 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Buildings on Binhams Meadow, Dunsfold Common Road and Nugent Close are within our area. If your building is just outside Dunsfold, we cover Loxhill (1 mile north), Hascombe (2 miles north), Alfold Crossways (2 miles south-east), Elmbridge Village (2 miles north-east) and Grafham (3 miles north). Further afield, our area takes in Guildford (9 miles north), Woking (14 miles north), Farnham (12 miles north-west), Dorking (13 miles north-east), Frimley (15 miles north-west) and Haslemere (7 miles west).
Landmarks near Dunsfold
We work on buildings around Fir Tree Copse and The Sun Inn Public House and the streets around them. For rail, the closest station is Witley station, roughly 3.8 miles west of the centre. Nearby you will also find Milford Hospital (4.3 miles north-west). Not far away are Lower Lake and Hydon's Ball.
From enquiry to sign-off
Occupied buildings need a little choreography. The work area is signed and kept contained, keep walkways clear and move on in phases so staff and visitors can carry on around us. If others near Dunsfold need work, visits can be combined, which keeps travel down. A fixed quote is given before anything starts.
- We start with your penetration schedule, drawings or specification.
- Access, permits and the order of areas are agreed with the site team.
- Each opening is checked for wall or floor type, service, gap and depth.
- Unsuitable material is removed and the opening cleaned so the seal starts clean.
- The specified backing and sealant go in to depth and are finished neatly.
- We tell you about openings that need a different product.
Getting the site ready
- Tell us your opening times and when work is allowed
- Point out parking and an unloading spot
- Confirm the product named in the specification
Get a fixed quote
To get a fixed quote, phone 01277 525 020 or email drawings and photos. Our quote form is another easy route.
Read more
Your questions answered
Can you take on a job at a hospital such as Milford Hospital?
Yes, healthcare and care buildings are part of our work. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Is Dunsfold too small for you to travel to?
Not at all: smaller places are covered as well as towns. We work across Greater London and the South East. Good photographs up front let us bring everything on the first visit.
Can you seal any opening with fire-rated sealant?
No. A sealant’s evidence covers set services, gaps and wall or floor types. Outside that, a different product is needed, specified by your designer.
What do BS EN 1366-3 and BS EN 13501-2 mean?
The tests are BS EN 1366-3 for penetrations and BS EN 1366-4 for linear joints, and classification is to BS EN 13501-2. An EI 60 seal kept its integrity and insulation for 60 minutes as tested; installing to the detail is what carries that across to site.
What changes on 2 September 2029?
It mainly affects England, where Approved Document B is dropping its BS 476 references from 2 September 2029. Products are then judged on BS EN 13501-2 classifications, subject to transitional arrangements. Scotland follows its own Technical Handbook, including clause 2.1.14 on service penetrations.
Are you members of a third-party fire-stopping installer scheme?
No, and we’d rather be clear about that. Some clients require third-party installer schemes even though the law doesn’t, so check your contract first. Where it isn’t required, we install the specified sealant to the maker’s details.
Do you work in Scotland as well as England?
Our area runs from Greater London and the South East to every part of Scotland. Scotland’s non-domestic Technical Handbook, clause 2.1.14, expects service penetrations to be fire stopped to at least the wall or floor’s fire resistance, with proprietary products tested for the end use.
Why it’s worth doing now in Dunsfold
Sealing behind the M&E trades area by area beats a sweep at the end. Openings are visible, access is open and nothing has to be taken down, and the right detail can be checked at the time. One visit to deal with every failing joint makes more sense than several trips to a place like Dunsfold, rather than one at a time. Send photos of each area and we’ll quote for the lot.
We don’t publish prices, because the scope varies so much from one building to the next. For a fixed figure, call for a quote.
Why choose Mastic Doctor in Dunsfold
- Constructionline member for supplier checks
- Fully insured
- A fixed quote before work starts
- Products installed to the manufacturer’s instructions
Take a look at our cost guide or our accreditations and insurance.