Oxfordshire · England
Fire Rated Sealant in Harwell
Our applicators work in Harwell on intumescent and fire-rated sealant around gaps, frames and service penetrations. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Gaps filled with a product that isn’t fire-rated
- Holes left by a change of layout
- Unsealed gaps around fire door frames
Commercial buildings in Harwell
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. There are hotels and other places to stay in and around Harwell. For hotels, a room-by-room programme keeps most rooms in use while the work goes on.
If you let a flat or house near Didcot Parkway station, fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. Managing a site like Harwell Primary School? Then gaps opened by contractors for new cabling are a common finding in schools and offices.
Harwell is about 2 miles west of Didcot, in Oxfordshire. Harwell gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 443 places across Oxfordshire. We also work in Oxford, about 11 miles from Harwell.
Work in OX11 is quoted and booked the same way as anywhere else. We cover properties on High Street, Loder Road and The Styles and the roads around them. Nearby, we also carry out fire rated sealant in West Hagbourne (2 miles south-east), Coscote (2 miles east), Upton (2 miles south-east), Chilton (2 miles south) and East Hagbourne (2 miles east). Within a short drive, we also cover Oxford (11 miles north), Abingdon-on-Thames (5 miles north), Witney (15 miles north-west), Wantage (6 miles west), Grove (6 miles west) and Faringdon (13 miles west).
Around Harwell
We work in homes and buildings around The Crispin pub, UTC Oxfordshire and UTC Oxfordshire, among other places. The nearest railway station is Didcot Parkway station, about 2.3 miles east. Other landmarks nearby include Atlas Computer Laboratory (2 miles south-west) and Abingdon Community Hospital (4.8 miles north). Open spaces near Harwell include Churn Hill and Mowbray Fields.
Fire rated sealant in Harwell, done properly
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, door frames and plasterboard & masonry, and people most often call us about open gaps behind door architraves and sealant items on a fire risk assessment action list.
If you run a pub, café, guest house or shop in or near Harwell, the washrooms and kitchen need the same attention as a big site.
Your job is guaranteed for a year, as with all our work.
- Where
- Harwell (OX11)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What sealant work cannot fix
We’ll always be straight with you, so here’s what sealant can’t fix:
- Big openings where sealant alone is not the tested solution
- Certifying a building or signing off its fire safety
- Fire doors that need new seals, closers or hardware
If you’re not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Where we work in Harwell
- Flats & HMOs
- Linear gaps
- Pipe & cable gaps
- Door frames
- Service penetrations
- Plasterboard & masonry
Quotes for fire rated sealant in Harwell
For a quick quote, just ask. The main things that affect it are:
- Working hours on commercial sites
- Whether the work is at height
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
What it costs depends on how much there is to do, how hard the old material is to remove and access to the work. We give a clear quote before any work starts, so you know where you stand.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
- What the problem is, such as mould, gaps, leaks or cracking
For fire rated sealant in Harwell, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
How the job changes by surface
Plasterboard walls
Holes in plasterboard are often cut roughly for services. Where a hole is bigger than the sealant’s tested range, it needs another approach, and we will tell you.
Service penetrations
A copper pipe, a cable and a plastic pipe can all need different fire-stopping details. We follow the manufacturer’s tested detail for each, and tell you if sealant alone isn’t the right fix.
Why act early in Harwell
A quick fill with any sealant to hand is not fire stopping. Fire-rated products are tested in set gap sizes, depths and substrates, which is why we match the product and the method to each gap. In an older home around Harwell, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Combining jobs into one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We’ll give you a clear price for the lot.
Why us?
- Approved under the ARBOMaster scheme
- Sanitary silicone with an anti-fungal additive in wet areas
- Any old sealant cut out fully, not covered over
- Full insurance on every job
See our cost guide or our reviews.
Your questions about fire rated sealant in Harwell
Do you take on hotel work around Harwell?
Yes, hotels and guest houses are among the places we work. A room-by-room programme keeps most rooms in use while the work goes on.
Is Harwell within the area you cover?
Yes, Harwell is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is it OK to seal over old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
Can you tell me how many minutes the seal will last?
We do not give ratings or certificates for our work. Your specification sets the requirement, and we apply a product tested for it, recording the locations and products.
Is it messy?
Tidy work is part of the job. We protect what’s around the joints, and the area is left clean when we finish.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What should I tell you?
Tell us what needs doing and where, with pictures by email if possible. If we need more, we’ll ask.
Do you do fire sealant around door frames?
Yes. The joint between frame and wall is sealed with a fire-rated sealant, to the product’s details. The door, its seals and closer are for a door specialist.
Also near Harwell
Also in Harwell
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
Signs you need fire rated sealant in Harwell
Buildings are refitted and reconfigured over the years. A house turned into flats or an HMO, or an office split into smaller units, brings new walls, new service routes and new gaps.
These are the problems we are asked about most:
- Open joints along the top of partitions
- Gaps flagged on a fire risk assessment
- Gaps around pipes and cables through fire-resisting walls
- Old fire sealant that has split or come away
If you look after a church, hall or community building such as Church of St Matthew, service openings in its walls need the right fire-rated sealant, as in any building.
Comparing quotes
- How much experience the applicator has
- How the joint is cleaned and prepared
- How long to leave it before use
- How the colour is chosen
What we do, step by step
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it generally takes from a few hours to a few days, depending on the number of gaps and the access. Parking around Harwell is generally 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.
- First we work through your list or survey, measuring each gap and checking what it’s formed in.
- Old or unsuitable sealant is cut out and the gap cleaned.
- Where the tested detail needs backing or fill, we fit it.
- Fire-rated or intumescent sealant is applied to the right depth and tooled.
- We record the locations and products used for your records.
How to prepare
- Mention any sign-in or site rules at work premises
- Clear the area around the work
- Tell us about any water getting in
Getting a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll talk you through the work before giving you a price.