Brighton and Hove · England
Sand mastic for sash & case windows in Preston, Brighton and Hove
Sand mastic in Preston from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked mastic round a front door frame
- Old sand mastic that has cracked, crumbled or fallen out
- Open joints round the window box
When it is not the sealant
A few problems are outside what sealant work can do:
- Masonry that needs repairing
- Cracked or broken glass
- Sashes that rattle, stick or will not open
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
Where we work in Preston
- Stone surrounds
- Sash and case windows
- Brick reveals
- Period & listed homes
- Tenement windows
- Timber door frames
How we handle sand mastic in Preston
Traditional burnt sand mastic blends with stone and brick surrounds. It suits period and listed homes, where modern sealant can look out of place. If you have mastic dropping out of the joint and a silicone bead on a sash window that spoils the look, we can put it right.
In smaller places like Preston, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. The right sealant depends on the frame and on what it sits in.
The work is covered for a year after we finish. If anything isn’t right with it, call 0345 464 0079 or send us an email.
- Location
- Preston (BN1, BN3, BN88)
- Region
- Brighton and Hove
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Preston questions
I let a flat near Preston Park station. Can you help?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
Is Preston within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can sand mastic be painted?
It’s traditionally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
Can new sealant go over the old?
No, it will not last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Where is Mr Mastic based?
We work from Crawley. We cover Preston and the rest of Brighton and Hove.
Can you replace silicone on a period window with sand mastic?
Often, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
Nearby places to Preston
Also in Preston
Frames and glazing around Preston
Preston is within about 2 miles of 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 older windows and doors, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as St Bernadette's Catholic Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Preston Park station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. In the older streets around St John the Evangelist's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Preston is about 1 mile north-west of Brighton, in Brighton and Hove. We provide sand mastic to homeowners, landlords and businesses in Preston and nearby. Preston is one of 30 places in Brighton and Hove where we work.
We cover every part of BN1, BN3 and BN88 for sand mastic. Local streets include Home Road, Bates Road and Loder Road. Being close to the A23, Preston is easy for our applicators to reach for sand mastic. Nearby, we also carry out sand mastic in Withdean (1 mile north), Prestonville (1 mile south), Hollingdean (1 mile east), Seven Dials (1 mile south) and West Hill (1 mile south). Larger places within reach include Saltdean (6 miles south-east), East Saltdean (6 miles south-east), Roedean (3 miles south-east), Rottingdean (4 miles south-east) and Ovingdean (4 miles south-east).
Local landmarks in Preston
Around Preston, our work takes us to homes and buildings near Preston Park, The Crown and Anchor Inn and Varndean College and the streets around them. There’s a railway station in Preston itself: Preston Park station. Well-known places in the area include Churchill Square (1.5 miles south) and Brighton Transport Museum (0.5 miles south). Not far away are Newmarket Hill and Ladies Mile.
Why it’s worth doing now in Preston
If you are redecorating, renew the mastic first. Paint over cracked mastic will not stop the gaps and traditional guidance is to leave the new mastic unpainted. Around Preston, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
Combining jobs into one visit is generally more efficient than separate visits. You’ll get one clear quote for the whole job.
Why Preston customers choose us
- Every job guaranteed for a year
- Full insurance on every job
- Quality sealants from Arbo and Everbuild
- We never seal over old sealant
See how sealant jobs are priced and our reviews.
The process
The work is kept neat and contained to the joints we’re treating, so you can carry on as normal. The job normally takes anything from a few hours to a full day, depending on how many windows. For a job in Preston, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
How to get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, phone 0345 464 0079 or email us.
Related advice
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Make sure water runs off the sill
- Get any rot dealt with first
- Renew mastic before redecorating the windows
- Check the mastic when you check the paintwork
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Sound mastic protects the frame. Failed mastic lets water reach the timber, which can lead to rot.
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too in Preston and across Brighton and Hove. Several sites can go on one quote, and we’re fully insured for the work.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can go on one quote.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
How we quote for sand mastic
Your quote is based on your job. We take into account:
- Which sealant suits the joint
- The number of rooms or windows
- Mould in or behind the old joints
- The number and length of the joints
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
Asking for a quote
You don’t need to know the technical terms. It helps if you can tell us:
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand.