Hertfordshire · England
Fire-rated sealant in Ashwell, Hertfordshire
Intumescent and fire-rated sealant around gaps, frames and service penetrations for homeowners, landlords and businesses in Ashwell. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps flagged on a fire risk assessment
- New service routes left unsealed after building work
- Fire stopping disturbed by later work
How we handle fire rated sealant in Ashwell
In flats, HMOs, offices and schools, fire stopping is often disturbed by later work. A new cable run or a replaced pipe can leave an open hole behind. We seal them with a product tested for that kind of gap. We work on flats & HMOs, linear gaps and door frames, and the jobs we see most are door frames with gaps between frame and wall and old fire sealant that has split or come away.
Community buildings, schools and small businesses around places like Ashwell have washrooms and kitchens that see a lot of use. Sealant and fire-rated joints there matter as much as in any larger building.
We stand behind the work with a one-year guarantee.
- Place
- Ashwell (SG7)
- Region
- Hertfordshire
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in Ashwell
Doing it once, properly, beats doing it twice. If the details weren’t followed, the seal may need redoing once someone inspects it. In an older home around Ashwell, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will send you a clear quote for the lot.
Why choose Mr Mastic in Ashwell
- Any old sealant cut out fully, not covered over
- An ARBOMaster approved applicator
- Sanitary silicone with an anti-fungal additive in wet areas
- Quality sealants from Arbo and Everbuild
Take a look at what affects the cost and our reviews.
Honest limits
Before booking, it’s worth knowing the limits too:
- Sign-off of the building, which sits with building control or your assessor
- Assessing a building’s fire safety
- Openings too large for sealant, which need batts, boards or another system
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer before you book.
What we seal
- Pipe & cable gaps
- Plasterboard & masonry
- Linear gaps
- Door frames
- Flats & HMOs
- Service penetrations
Common questions in Ashwell
Will you come out to Ashwell?
Yes. Ashwell is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Ashwell & Morden station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
What do you need from me for a quote?
The location, the problem and the rough size of the job. Photos by email help too.
Is there any odour?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Towns and villages near Ashwell
Also in Ashwell
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Landlord and commercial work in Ashwell
If you manage several properties in or around Ashwell, several properties can be quoted together. Send us the addresses and the work at each.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
How the visit works
On the day, we start by going over the job with you, so you know exactly what we’re doing. We protect the surfaces around the joints before any work begins. Most jobs take anything from a few hours to several days, depending on how many gaps there are. Parking around Ashwell is usually easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- Before starting, we go through the specification or action list with you.
- Each gap is measured and its substrate and service noted.
- Unsuitable material such as ordinary foam or silicone is cut out.
- We fit backing where needed and apply the fire-rated sealant to depth.
- We hand over a list of locations and products.
How to prepare
- Mention any tricky access
- Let us know about earlier repairs to the joints
- On commercial sites, let us know about site rules
Get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you are ready, call 0345 464 0079 or email us.
Advice
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Ask every contractor to reseal any fire stopping they disturb
- Keep pictures of seals that will be hidden
- Flag any open gap you spot round a pipe or cable
- Check whether a sealant can be painted before decorating over it
Let contractors know where fire stopping has been done, and ask them to reseal anything they cut through. Later work is a common cause of damaged fire stopping.
A flagged gap shouldn’t wait for the next assessment. Get it sealed and recorded so the item can be closed.
Workplaces and buildings in Ashwell
Workplaces and the common parts of blocks of flats in England need a fire risk assessment under the Regulatory Reform (Fire Safety) Order 2005, and gaps around services are often picked up there. We apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details.
If you let a flat or house near Ashwell & Morden station, fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. If you look after a church, hall or community building such as St Mary's Church, older buildings that have had new heating or wiring often have service gaps worth checking. For site and facilities teams at buildings such as Ashwell Primary School, fire-stopping around service openings should be restored whenever new services go in.
Ashwell is about 5 miles north-east of Letchworth, in Hertfordshire. Jobs in Ashwell get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Ashwell is one of 381 towns and villages in Hertfordshire we cover. There’s also a page for Chelmsford, roughly 34 miles from Ashwell.
Jobs for fire rated sealant in SG7 works the same way as everywhere else we cover. That includes homes and businesses on High Street, Station Road and Alms Lane and the roads around them. Close by, we work in Ashwell End (1 mile west), Bury End (2 miles west), Newnham (2 miles south-west), Caldecote (2 miles west) and Hinxworth (2 miles west). Within a short drive, we also cover Stevenage (9 miles south), Hitchin (8 miles south-west), Letchworth (5 miles south-west), Letchworth Garden City (5 miles south-west), Stotfold (4 miles south-west) and Baldock (4 miles south).
Near you in Ashwell
In Ashwell, that means homes and buildings near Rose And Crown Public House, among other places. Ashwell’s nearest station is Ashwell & Morden station, roughly 2 miles east of the centre. Other landmarks nearby include Bygrave House (2.2 miles south) and Fairfield Hospital (4.8 miles south-west). Green spaces nearby include Fox Covert.
What the job involves on each surface
Door frames
Behind most architraves is a gap between frame and wall. We seal any open gap to the product’s tested details before the trim goes back.
Masonry and concrete
Preparation counts on brick, block and concrete. The gap is cleaned and backed where required before applying the sealant.