Brighton and Hove · England
Brunswick Window Mastic
Window mastic across Brunswick and nearby, with old sealant always removed completely and a 12-month guarantee.
- Leaking joints at the ends of sills
- Rushed sealant from a window installation
- A bead that does not match the frame
What affects the cost of window mastic
For a quick quote, just ask. What matters most is:
- Mould in or behind the old joints
- The old material and how stubborn it is
- How easy the joints are to reach
- How many rooms, windows or areas are involved
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
What we need to know
Photos by email are helpful but not essential. Please mention:
- Whether it’s a home or a business
- Any access issues, like height or stairs
- The problem you’ve noticed
- How many joints, rooms or windows are involved
To get a quote, phone 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before work begins.
How we handle window mastic in Brunswick
There are two joints on most windows. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. If you have cracked or shrunken mastic around the frame and rushed sealant from a window installation, we can help.
Around Brunswick, conservatories, garden rooms and patio doors are often part of the house. Their glazing joints and frame seals are as much a part of the job as the windows.
We stand behind the work with a 12-month guarantee.
- Place
- Brunswick (BN1, BN3, BN50)
- Region
- Brighton and Hove
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
Patio & French doors
Door frames take knocks and movement every time the doors are used. The sealant must cope with it.
Window sills
Every drop off the glass ends up on the sill, so the joints at each end and underneath matter. Each is cleaned out and resealed.
What we are called out for in Brunswick
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. A sealant that cannot keep up eventually tears.
Any of these means the joints need attention:
- Gaps where the sill meets the wall
- A bead that does not match the frame
- Damp patches on the reveal after heavy rain
- Old mastic that has gone black or come away
Managing a site like St Mary Magdalen Catholic Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Before booking anyone
- How long the guarantee is
- Whether they seal over old material or remove it
- How long to leave it before use
- What happens if the job turns out different
Why act early in Brunswick
Draughts and leaks don’t always mean new windows. If the frames and glass are in good order, resealing the joints is often all that is needed. Problems with the glass or gaskets are for a window company, and we’ll say so. Homes in smaller places like Brunswick can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first.
Why book with us
- 180+ five-star Google reviews
- Domestic, commercial and hotel work
- Sanitary silicone with an anti-fungal additive in wet areas
- Trusted Arbo and Everbuild sealants
See what affects the cost or our reviews.
What window mastic looks like in Brunswick
Brunswick is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Historic houses like Royal Pavilion (about 0.7 miles east) are a reminder that the area around Brunswick has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Rented homes near Brighton station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. If you live in an older home near St Stephen's Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Brunswick is about 1 mile south-west of Brighton, in Brighton and Hove. Our applicators cover window mastic for homes and businesses in Brunswick and nearby, as part of our work across Brighton and Hove. Our Brighton and Hove coverage runs to 30 places, Brunswick among them.
Jobs for window mastic in BN1, BN3 and BN50 is quoted and booked the same way as anywhere else. Local streets include Farm Road, York Road and Powis Road, and we cover them all. If you’re just outside Brunswick, we cover Seven Dials (1 mile north-east), West Hill (1 mile north-east), Prestonville (1 mile north), Hove (1 mile north-west) and Carlton Hill (1 mile east). We also work in nearby towns such as Hangleton (3 miles north-west), Patcham (3 miles north), Hollingbury (3 miles north), Bevendean (3 miles north-east), Saltdean (5 miles east) and East Saltdean (6 miles east). Brunswick is one of the larger places we cover in Brighton and Hove.
What’s near Brunswick
We work in homes and buildings around St. Ann's Well Gardens, Maris & Otter pub and The Drive Prep School and the streets around them. The closest station to Brunswick is Brighton station, about 0.6 miles north-east. Other landmarks nearby include Old Police Cells Museum (0.7 miles south-east) and Churchill Square (less than half a mile east). Green spaces nearby include Whitehawk Hill and Newmarket Hill.
Brunswick: your questions answered
Is window mastic in a coastal place like Brunswick any different?
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.
Do you work for landlords with property near Brighton station?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses, and we are fully insured.
Does the work come with a guarantee?
Yes. Our 12-month guarantee covers every job.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
What happens on the day
When we arrive, we start by going over the job with you, so you know exactly what we are doing. We protect the surfaces around the joints before any work begins. Most jobs take a few hours for a few frames, or a day or more for a whole house. A visit to Brunswick is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Move anything stored near the joints
- Plan for the work area to be out of bounds to pets and children
Get a quote
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Advice
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Don’t use solvent cleaners on the joint
- Wash the frames with mild soapy water
- Paint up to the joint, not over it
- Do not aim a pressure washer at the joints
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.