Fire-rated sealing and fire stopping in Cold Harbour, Windsor and Maidenhead
Work needed on a service penetration in Cold Harbour? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Unsealed joints where partitions meet the slab
- Improvised or mixed-product fire seals
- Service penetrations left open after M&E works
Fire stopping for businesses in Cold Harbour
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Fire stopping in Cold Harbour
For main contractors, our fire stopping package slots in after the M&E trades have finished in an area. To price a package, phone 01277 525 020 or email us with the schedule or marked-up drawings alongside the manufacturer’s details. Tell us what records you need and we will confirm with the quote. Site teams most often ask us about open linear gaps along the top of fire-resisting walls and damaged fire seals in risers and voids, on small duct penetrations where the tested detail allows, cable penetrations and pipe penetrations. Searching for sealant specialists in Cold Harbour? Mastic Doctor has worked for contractors, FMs and building owners since 2005.
Barn and farm-building conversions near places like Cold Harbour 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.
Our workmanship is guaranteed for 12 months. If our installation lets you down in that time, we return and fix it.
- Where
- Cold Harbour (SL6)
- Region
- Windsor and Maidenhead
- Cover
- A 12-month guarantee
- Quotes
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
Building owners, agents and FMs in Cold Harbour
FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
Agents, factors and owners’ representatives all follow the same route: send details, get a fixed quote, we seal, guaranteed. Keys, access and contacts can be agreed in advance.
Maintenance after handover
To get the most from the new sealant:
- Look above ceilings when tiles are lifted for other jobs
- Record which product was used where
- Foam or ordinary sealant is never a fire-seal repair
- Leave fire sealant to cure fully before covering it
Don’t patch a fire-rated seal with anything outside its tested detail. Repairs need the same product and detail as the original unless the designer specifies otherwise.
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.
Towns and villages near Cold Harbour
Also in Cold Harbour
Common questions from Cold Harbour clients
Can you take on a job at a hospital such as St Mark's Hospital?
Yes. Healthcare sites are among the places we work. We follow the site’s permits, sign-in and infection-control procedures in every area.
Could you schedule work at a campus like Berkshire College of Agriculture for the vacation?
Yes. We plan campus work around teaching, exams and residence turnarounds. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Is the BS 476 change in 2029 relevant to fire stopping?
In England, references to the older BS 476 national classes are being removed from Approved Document B from 2 September 2029, subject to the Government’s transitional arrangements. After that, the European classification under BS EN 13501-2 is the route. Your designer will choose products with the right evidence.
Do you have third-party installer accreditation for fire stopping?
No, and we’d rather be clear about that. Third-party schemes aren’t a legal requirement, but many clients and main contractors ask for them, so it’s worth checking what your contract says. Where it isn’t required, we install the specified sealant to the maker’s details.
Is sealant suitable for all service openings?
No. A sealant’s evidence covers set services, gaps and wall or floor types. If an opening falls outside, it needs another solution, specified by your designer.
How many days will you need on site?
The duration is planned around your programme and the access we are given. You will have an expected duration with the quote.
Can you reseal penetrations after our M&E works?
Yes. Share the penetration schedule and product details for a fixed quote. We can follow the services contractor floor by floor keeping pace with the programme.
Fire stopping around Cold Harbour: how the place shapes the job
Central London is about 30 miles from Cold Harbour. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls; the gaps need the specified seal. Fire stopping of openings and penetrations in England falls under Approved Document B. 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. Our part stays the same: the specified product, installed to its tested detail.
Older community buildings such as Saint Peter that have been rewired or given new heating can have service gaps through walls worth checking against the specification. At a college such as Berkshire College of Agriculture, 1.8 miles north of Cold Harbour, checking penetration seals after summer M&E works is good practice. For a school such as Knowl Hill Church of England Primary Academy, penetration sealing fits best at the end of the summer works.
Cold Harbour is about 3 miles west of Maidenhead, in Windsor and Maidenhead. We cover Cold Harbour and the rest of Windsor and Maidenhead, with the same fixed quotes and 12-month guarantee as everywhere else. Our Windsor and Maidenhead coverage takes in 60 places. We also cover Reading, some 9 miles away.
Postcode districts covered here: SL6 for service penetrations. Sites close to Cold Harbour are covered too, including Knowl Hill (1 mile north-west), Warren Row (1 mile north-west), Bowsey Hill (2 miles west), Cockpole Green (3 miles north-west) and Wargrave (3 miles west). Further afield, our area takes in Maidenhead (3 miles east), Windsor (8 miles east), Boyn Hill (3 miles east), Cookham (5 miles north-east), Furze Platt (3 miles north-east) and Dedworth (7 miles east).
Near you in Cold Harbour
We work on buildings around Cox Green School and The Royal Oak pub and the streets around them. The closest station to Cold Harbour is Wargrave station, roughly 3.3 miles west. Nearby you’ll also find St Mark's Hospital (2.8 miles north-east). Open spaces near Cold Harbour include Hurley Chalk Pit and Taplow Lake.
How a job runs
Site rules come first: signing in, inductions and any permit to work. With the paperwork done, the joints are worked through in the order agreed with your site contact. Rural sites near Cold Harbour may need directions, gate codes or a contact on site. Add it to your enquiry and we will build it into the plan.
- We start with your penetration schedule, drawings or specification.
- We plan the sequence of floors, risers and voids with you.
- Each opening is checked for wall or floor type, service, gap and depth.
- Foam, ordinary sealant and debris come out.
- Backing and fire-rated sealant are installed to the detail and tooled.
- We tell you about openings that need a different product.
What we need from you
- Let building users know which areas are affected
- Send any specification or drawings in advance
- Make sure the joints can be reached
Request a quote
Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price against exactly what is specified. For smaller jobs, photos and a description will do.
Related advice
When it isn’t the sealant
Not every problem is a sealant problem, and we’re upfront when that’s the case. It won’t fix:
- Designing or specifying fire stopping, which sits with the designer or fire engineer
- Signing off or certifying a building’s fire stopping
- Openings that need collars, wraps, batts or boards rather than sealant
If you’re not sure, just phone 01277 525 020 or email us and we’ll give you a straight answer before you book.
Where we work in Cold Harbour
- Cable penetrations
- Service gaps in risers
- Small duct penetrations where the tested detail allows
- Joints between fire-resisting walls and floors
- Pipe penetrations
- Linear gaps at wall heads
What sets the cost
A fixed quote reflects the actual work. It takes account of:
- Distance, for remote addresses
- The site’s rules and procedures
- The total length or number of joints
- Removal of failed or old sealant
What a job costs comes down to how many linear metres there are, what has to come out first and how the joints are reached. Call for a quote once you have the details.
Details that help us quote
A good diagnosis starts with the right details. Tell us:
- Any specification or named product
- The asbestos register, for older buildings
- Clear photos of the problem areas
- How the joints are reached, and at what height
Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we’ll return a fixed quote that you can work with. If you have questions first, phone 01277 525 020 or use the quote form.
Why deal with it now?
Open service penetrations matter on ordinary days, not just in a fire: they also carry noise, draughts and smells between rooms. Sealing them to the specified detail deals with the fire risk first. Halls, stores and units around places like Cold Harbour may not be checked every day, so a failed joint can leak for a while before anyone sees it. Resealing early avoids that.
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 clients in Cold Harbour choose us
- A Constructionline member, so easy to vet
- Fixed quotes based on photographs, drawings or a visit
- CHAS accredited contractor
- Joints cleaned back to sound surfaces
See our cost guide or our accreditations.