Brighton and Hove · England
Window & door mastic in Brighton and Hove
Problem with your window and door frames in Brighton and Hove? We cut out the old, prepare the joints and apply the right sealant.
- Water coming in at the bottom corners of a door
- Gaps left after new windows were fitted
- Cracked or shrunken mastic around the frame
Window mastic for homes and businesses in Brighton and Hove
From a single sill to a whole house of windows, the work is priced before anything is done. To get one, ring 0345 464 0079 or drop us an email with the number of frames and any access details for window mastic in Brighton and Hove. If you’re dealing with leaking joints at the ends of sills and black, perished sealant on frames, we can put it right.
Walls in Brighton and Hove that face the prevailing wind take the most weather, and that is generally where the sealant gives up first. It’s worth looking at every frame, not just the one that leaks.
Whatever the size of the job, it’s backed by our one-year guarantee in Brighton and Hove.
- Place
- Brighton and Hove (BN3, BN41, BN1)
- Wider area
- Brighton and Hove
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlord and commercial work in Brighton and Hove
Landlords and letting agents in Brighton and Hove can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Avoid blasting the frames with a pressure washer
- Repaint timber before it’s bare
- Clear any debris from frame drain holes
- Don’t use solvent cleaners on the joint
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak, and if anything looks wrong, just call 0345 464 0079 or drop us an email.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.
When to call us in Brighton and Hove
Timber windows bring their own problems. Mastic painted over many times cracks with the paint, and timber moves with moisture as well as temperature.
Any of these means the joints need attention:
- Leaking joints at the ends of sills
- Cracked or shrunken mastic around the frame
- Rain getting in at the frame or under the sill
- Untidy mastic left by window fitters
For landlords with property near Aldrington station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Before you book anyone
- Which sealant they’ll use, and why
- How hidden problems are handled
- What the cure time is
- Whether they’re fully insured
FAQs for Brighton and Hove
I let a flat near Aldrington 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.
Does living near the coast affect window mastic in Brighton and Hove?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
Is the work guaranteed?
Yes. Every job comes with our 12-month guarantee, and we’re ARBOMaster approved applicators.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Are you fully insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
What happens if it’s left?
The work is quick compared with the damage it prevents: it takes a few hours for a few frames, or a day or more for a whole house. Leave it until water is coming in and you may need plastering and decorating as well. In a family home in Brighton and Hove, a failed seal around a bath or a frame lets water into places you cannot see, such as under the floor, behind a panel or into a wall. Whatever the joint, failed sealant only gets worse.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Why choose Mr Mastic in Brighton and Hove
- 12-month guarantee on every job
- Anti-fungal silicone where joints get wet
- We are fully insured
- Trusted Arbo and Everbuild sealants
Read what affects the cost and what customers say.
Honest limits
It helps to know what we cannot do:
- A frame that has rotted at the joint
- Condensation trapped between the panes
- Draughts through the window seals rather than the frame
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly before you book.
What we seal
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- Composite doors
- uPVC windows
- Window sills
What happens on the day
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. Expect the work to take most of a day for a typical house, less for a few frames, and we tell you how long to leave it before we go. For a job in Brighton and Hove, we need access to where the work is and somewhere nearby to park. If the job is outside, mention gates, side access and anything above ground floor.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, call 0345 464 0079 or send us an email.
Read more
Also near Brighton and Hove
Other services in Brighton and Hove
Surface by surface
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so we use a flexible, low-modulus sealant. We match white, brown, anthracite grey and black frames.
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.
Windows and doors in Brighton and Hove
Brighton and Hove is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. With historic houses such as Portslade Manor (about 1.3 miles west) nearby, there’s older building stock in the area around Brighton and Hove as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
If you look after a building such as West Hove Infant School, its window and door frames need their mastic kept sound, just like a home’s. Homes close to Holy Cross Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Brighton and Hove is in England. We provide window mastic to homes and businesses in Brighton and Hove and nearby, as part of our work across Brighton and Hove. Our area takes in 30 places across Brighton and Hove, from the larger towns to small villages.
Here we cover the BN3, BN41 and BN1 postcode area for window mastic. Local streets include New Church Road, Princes Square and Station Road, and we cover them all. You’ll find Brighton and Hove on the A270 and A293, so it’s easy for us to get to with everything needed for window mastic. Other places close to Brighton and Hove include Aldrington (1 mile south-west), West Blatchington (1 mile north-east), Hove (1 mile south-east), Prestonville (2 miles east) and Brunswick (2 miles south-east). Further out, we also cover Brighton (3 miles east), Carlton Hill (3 miles east), Hanover (3 miles east), Kemptown (3 miles south-east), Hollingdean (3 miles east) and Whitehawk (4 miles east).
Landmarks near Brighton and Hove
Locally, jobs take us to homes and businesses close to Hove Park, The Drive Prep School and Hove Park School. Brighton and Hove has its own railway station: Aldrington station. Well-known places in the area include British Engineerium (0.7 miles north-east) and Churchill Square (2.1 miles south-east). Green spaces nearby include Thundersbarrow Hill and Ladies Mile.