Fire Stopping in Astwick
Fire stopping in Astwick, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.
- Head-of-wall gaps with no fire seal
- Snag lists that include open service penetrations
- Improvised or mixed-product fire seals
Fire stopping in Astwick
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 Astwick
We are commercial sealant applicators, CHAS accredited and a Constructionline member, with CSCS-carded applicators on site. We hold no third-party fire-stopping installer certificate, and we won’t pretend otherwise. We install the specified fire-rated sealant to its tested detail, and our workmanship carries a 12-month guarantee. We work on cable penetrations, linear gaps at wall heads and small duct penetrations where the tested detail allows, and what we are called in for most is damaged fire seals in risers and voids and open linear gaps along the top of fire-resisting walls. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, the work in Astwick is the same: failed joints cut out, faces prepared and the right sealant laid to the right depth.
For a smaller site near Astwick, we plan to do all the penetrations in one go, so send the specification and photos first. We install to the specification and the manufacturer’s guidance, leaving design and sign-off with the designer and building control.
Our workmanship is guaranteed for 12 months, in Astwick as everywhere else we work. If our installation lets you down in that time, we return and fix it.
- Where
- Astwick (SG5)
- Wider area
- Hertfordshire
- Cover
- 12 months on every job
- Quote
- Quoted before any work starts
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Our process
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. Jobs in and around smaller places like Astwick are usually planned as a single visit, so photos and measurements up front really help. Then the right materials arrive with us.
- We ask for the product and detail your designer has specified.
- We sort the openings by the detail each one needs.
- Old or wrong materials are cut out.
- Where the detail needs backing, it goes in at the stated depth.
- Fire-rated or intumescent sealant goes in around the services and is tooled off.
- Completed areas are checked with you, with the records agreed when we quoted.
Preparing the site
- Confirm the product named in the specification
- Explain the parking and delivery arrangements
- Let building users know which areas are affected
Getting a fixed quote
If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price against exactly what is specified. Smaller jobs need nothing more than photographs and a few notes.
Advice
Also near Astwick
More services for Astwick
Why it’s worth doing now in Astwick
Fire stopping is a regular point raised at inspections and handover. Late discoveries can delay handover while openings are reopened and resealed which is why earlier is better. Converted and older buildings near places like Astwick tend to move, and aged sealant cracks. The right product, sized to the joint, copes much better.
What a job costs comes down to the quantity of joints, how much old material needs removing and how the joints are reached. Call for a fixed quote once you have the details.
Why choose Mastic Doctor in Astwick
- 12 months’ guarantee on every job
- CHAS accredited contractor
- Work to your specification and the manufacturer’s guidance
- Fixed quotes based on photos, drawings or a visit
Cost factors for service penetrations
We price every job individually. The things that drive the figure:
- The site’s rules and procedures
- The total length or number of joints
- Any access equipment needed
- Location, for remote and island sites
Small jobs and large programmes are priced from the same things: scope, access, product and programme. Call for a quote and we will put a fixed figure on it.
What we need to price the job
The more we know, the firmer the quote. Helpful details to send:
- How the joints are reached, and at what height
- Asbestos survey details if the building is older
- Any specification or named product
- Any dates the work must fit around
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To start the process, phone 01277 525 020 or email us.
Doing it in-house
Redoing a failed joint usually costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.
Some joints are best left to specialists: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.
Astwick: questions and answers
Do you seal service penetrations in hotels around Astwick?
Yes, where the specification calls for fire-rated sealant. It goes in to the manufacturer’s tested detail for the wall or floor and the services passing through, and we’ll tell you if the detail calls for a collar, wrap or batt instead.
What happens to BS 476 references for fire stopping in Astwick?
Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes the route, subject to transitional arrangements. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.
Is colour matching possible?
Often, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We’ll confirm the colours available for the specified product.
Do you need to see the site first?
That depends on the size and complexity of the job. Simple work can often be priced from photos, while larger or less clear jobs get a site visit first.
Can weather delay the job?
It can, when the joints are outside. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Indoors, the weather is rarely a problem.
Do you take on multi-site work?
Yes. Multi-site work and planned programmes are a core part of the service, planned site by site to suit how each building is used.
Do you work to architects’ specifications?
Yes. The specification and the manufacturer’s installation guidance are what we work to, and we raise anything unclear before work begins.
Where services cross fire walls in Astwick
Astwick has a number of hotels close by, all within 2 miles. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal. Astwick is about 37 miles from central London. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls; the gaps need the specified seal.
Theatres, wards and plant rooms at sites like Fairfield Hospital, 2.2 miles to the south of Astwick, all have compartment walls crossed by services. Schools such as St Mary's CofE Academy Stotfold often have new data and services installed during holidays, and penetrations through fire-resisting walls should be checked afterwards. For a building such as Church of Saint Guthlac, new heating or data runs are the usual reason penetrations need sealing.
Astwick is about 1 mile north of Stotfold, in Hertfordshire. If you’re looking for fire stopping in Astwick, we can help, as we do across Hertfordshire. 371 places across Hertfordshire fall within our area, including Astwick. For work in that direction, see our London page, about 37 miles away.
We cover the SG5 postcode districts for service penetrations. If your site is on Astwick Road and Sycamore Avenue or close by, we can quote for service penetrations. Close to Astwick, our area also takes in Stotfold Common (1 mile south), Stotfold (1 mile south) and Radwell (2 miles south-east). Nearby towns on our patch include Stevenage (9 miles south), Hitchin (6 miles south), Letchworth (4 miles south), Letchworth Garden City (4 miles south), Baldock (4 miles south-east) and Benslow (6 miles south).
Near you in Astwick
Astwick’s nearest station is Arlesey station, about 1.5 miles west of the centre. Nearby you’ll also find Fairfield Hospital (2.2 miles south) and Bygrave House (3.6 miles south-east). Green spaces nearby include Arlesey Old Moat and Glebe Meadows.
Surface by surface
Cables and cable bundles
Data cabling added after handover is a regular cause of open service penetrations. We reseal around them to the specified detail, and we tell you if the bundle exceeds what sealant covers.
Metal pipes
Metal pipes conduct heat, so their details often call for extra measures along the pipe. We follow whatever the detail requires and flag anything we can’t match.
When something else is needed
Part of a good diagnosis is knowing where sealant stops. We’ll tell you if the real problem is any of the following:
- Fire risk assessments, a job for a competent assessor
- Plastic pipes whose detail calls for a collar or wrap
- Construction that lacks the fire resistance the seal relies on
Not sure which it is? You can ring 01277 525 020 or email us and we’ll tell you honestly before you book.
Surfaces we seal
- Small duct penetrations where the tested detail allows
- Joints between fire-resisting walls and floors
- Service gaps in risers
- Cable penetrations
- Linear gaps at wall heads
- Pipe penetrations