Hampshire · England
Wherwell Fire Rated Sealant
Intumescent and fire-rated sealant around gaps, frames and service penetrations for homes and businesses in Wherwell and across Hampshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Gaps left after a refit or conversion
- Seals cut through by electricians, plumbers or data installers
- Open joints along the top of partitions
When to call us in Wherwell
Over time, buildings change layout and use. A house turned into flats or an HMO, or an office split into smaller units, brings new walls, new service routes and new gaps.
The problems people normally mention when they call are:
- Old fire sealant that has split or come away
- Gaps filled with a product that is not fire-rated
- New service routes left unsealed after building work
- Open gaps behind door architraves
Managing a site like Wherwell Primary School? Then fire-stopping around service openings should be restored whenever new services go in.
What to look for in a quote
- Whether all the old sealant comes out first
- What happens if the job turns out different
- How the surfaces are prepared before sealing
- Whether VAT is included
Fire rated sealant in Wherwell
A fire seal relies on being installed the way it was tested: correct depth, correct backing and a product suited to the surfaces. That’s the part we focus on, one gap at a time. We work on service penetrations, plasterboard & masonry and pipe & cable gaps, and people most often call us about linear gaps at the head of walls and open gaps behind door architraves.
In a village or hamlet like Wherwell, commercial work is more likely to be a pub, a farm shop, holiday lets or a village hall than an office block. They all have washrooms, kitchens and service openings that need the right sealant.
A 12-month guarantee comes as standard, so you’re covered after we have gone.
- Where
- Wherwell (SP11)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
Linear gaps
Gaps along the top of partitions are easy to miss above a ceiling. We work along the whole run so there are no open sections left.
Plasterboard walls
In plasterboard walls, the condition of the board edge matters. Crumbling edges are cleaned back before the sealant goes in.
Why act early in Wherwell
Doing it once, properly, beats doing it twice. If the details weren’t followed, the seal may need redoing when the building is next checked. Around Wherwell, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Leaving a failed joint generally makes the job bigger, not smaller. If you’re unsure, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why book with us
- A 12-month guarantee on all work
- Approved under the ARBOMaster scheme
- We leave the area clean and tidy
- We’re fully insured
See our cost guide and what customers say.
Common questions in Wherwell
I let a flat near Andover station. Can you help?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Will you come out to Wherwell?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you take out the old sealant first?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Do you offer different sealant colours?
Yes. White, clear and grey are common, and other colours are available for many products, and we agree the colour with you before we start.
Can ordinary silicone be used in a fire-stopping gap?
No. Standard sealants aren’t made or tested to stop fire. We cut it out and reseal with a fire-rated product.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
The process
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the work takes from a few hours to a few days, depending on the number of gaps and the access for a typical job. Somewhere as small as Wherwell, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start with the survey or action list, checking the size and surfaces of every gap.
- We remove any old or unsuitable filler and clean the gap.
- Backing or fill is fitted where the product’s tested detail calls for it.
- We apply the fire-rated or intumescent sealant to the specified depth and tool it.
- We record the locations and products used for your records.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Tell us about any water getting in
- Plan for the work area to be out of bounds to pets and children
Getting a quote
To get a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.
Advice
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Look in service cupboards and ceiling voids from time to time
- Tell trades working in the building that fire seals must be put back
- Allow for resealing whenever new services are run
- Never patch a fire seal with standard sealant
Don’t add foam, filler or ordinary sealant over a fire seal. If it needs repair, use the same type of product. Ask us if you’re not sure which product was used.
Leave a fire-stopping gap open and smoke can move through the building much more easily. Sealing it early is a simple step to take.
Workplaces and buildings in Wherwell
Workplaces and the common parts of blocks of flats in England need a fire risk assessment under the Regulatory Reform (Fire Safety) Order 2005, which is often where open fire-stopping gaps are first noticed. We work to the specification you are given, installing the product to its tested details.
If you look after a church, hall or community building such as Church of St Peter and Holy Cross, service openings in its walls need the right fire-rated sealant, as in any building. Rented homes near Andover station change hands often, and new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
Wherwell is about 3 miles south-east of Andover, in Hampshire. If you need fire rated sealant in Wherwell, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover Hampshire from our Crawley base, Wherwell included. Wherwell is one of 683 towns and villages in Hampshire where we work. Southampton is on our list too, around 17 miles away.
Here we cover the SP11 postcode area for fire rated sealant. That includes homes and businesses on High Street, Fair Piece and Beech Grove and the roads around them. We also cover the places around Wherwell: Wherwell Wood (1 mile north-west), Cottonworth (1 mile south-west), Chilbolton (1 mile south), Fullerton (1 mile south-west) and South Harewood (1 mile north-east). Larger places within reach include Winchester (9 miles south-east), Eastleigh (14 miles south), Andover (3 miles north-west), Chandler's Ford (13 miles south), Romsey (12 miles south) and Hyde (9 miles south-east).
Around Wherwell
Locally, jobs take us to homes and businesses close to White Lion Public House and Longstock Park, among other places. The nearest railway station is Andover station, roughly 3.7 miles north-west. Other landmarks nearby include Andover Museum (3.3 miles north-west) and Andover War Memorial Hospital (4 miles north-west). Not far away are Mill Lake and Anton Lakes.
What affects the cost of fire rated sealant
Every job gets its own quote. These are the things that affect it:
- The product the joint needs
- The size of the job
- Access and height
- Any mould that needs treating
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts.
What we need to know
Before you ask for a quote, have a think about:
- How we’d reach the joints
- The rough size of the job
- If someone has resealed it before
- What’s wrong with the joints now
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved and send you a clear quote.
Landlords, agents and businesses in Wherwell
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.