East Sussex · England
Window Mastic in Alciston
Problem with your window and door frames in Alciston? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Gaps where the sill meets the wall
- Black, perished sealant on frames
- Gaps between the frame and the inside reveal
Questions from Alciston
Do you cover Alciston for window mastic?
Yes. We work across London and the South East, and Alciston is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing, and we will give you a clear quote.
Do you cover smaller places like Alciston?
Yes, Alciston 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.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme.
Should I try DIY first?
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.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint before we leave.
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. We remove it all first.
Will resealing my frames help with draughts?
Yes, where the draught is at the frame edge. We find where the air is coming from before we reseal.
Do the sealants smell?
Sometimes, a little. Any smell clears as the sealant cures.
About our window mastic in Alciston
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We are fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. We’re often asked to deal with rushed sealant from a window installation and draughts coming in around windows and doors, across timber windows & doors, composite doors and aluminium frames.
In a village or hamlet like Alciston, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Where
- Alciston (BN26)
- Wider area
- East Sussex
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How we quote for window mastic
Call for a quick quote. The main things that affect it are:
- Which sealant suits the joint
- Any working-time requirements on site
- How many rooms, windows or areas are involved
- The amount of work
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or email us.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Photos by email, if that is easy
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
- How many joints, rooms or windows are involved
For window mastic in Alciston, ring 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
What window mastic looks like in Alciston
With historic houses such as Charleston Farmhouse (about 1.3 miles north-west) nearby, there’s older building stock in the area around Alciston as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. 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.
In the older streets around The Parish Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Alciston is about 4 miles north of Seaford, in East Sussex. Every kind of property in Alciston is covered for window mastic, old or new, large or small. The work is guaranteed for a year. We cover 289 towns and villages across East Sussex, large and small. Our Brighton page covers work nearby (12 miles or so).
We work across BN26 for window mastic. Neighbouring places we cover for window mastic include Selmeston (1 mile north), Berwick (1 mile north-east), Winton (1 mile south-east), Alfriston (2 miles south-east) and Milton Street (2 miles south-east). Further out, we also cover Eastbourne (7 miles south-east), Bexhill-on-Sea (14 miles east), Seaford (4 miles south), Lewes (7 miles north-west), Hailsham (6 miles north-east) and Crowborough (15 miles north).
Around Alciston
We work in homes and buildings around Rose Cottage Inn, among other places. Alciston’s nearest station is Berwick (Sussex) station, roughly 1.3 miles north-east of the centre. Well-known places in the area include Arlington Castle (1.7 miles south-east) and Chailey Heritage Marine Hospital (4.6 miles south-west). Not far away are Firle Beacon.
What happens on the day
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes a few hours for a few frames, or a day or more for a whole house, including the tidy-up. Somewhere like Alciston needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
- Let us know if you’ve seen damp or leaks
Ask for a quote
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or send us an email and describe the job.
Read more
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Clear any debris from frame drain holes
- Wipe condensation off the frames
- Don’t aim a pressure washer at the joints
- Walk round the house once a year and look at the joints
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Nearby places to Alciston
What else we do in Alciston
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Landlords, agents and businesses in Alciston
We work for landlords and letting agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
When to call us in Alciston
Some failures date back to when the windows were fitted. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, and it lets go sooner than it should.
Keep an eye out for any of the following:
- Draughty joints inside around the window
- Leaking joints at the ends of sills
- Old mastic that has gone black or come away
- Untidy mastic left by window fitters
If you let a flat or house near Berwick (Sussex) station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
What to look for in a quote
- Is the old sealant removed completely?
- How much experience the applicator has
- What insurance they hold
- What the cure time is
Why deal with it now?
Working on frames from a ladder with a sealant gun isn’t easy, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. In a small place like Alciston, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Doing several joints on one visit generally makes better use of the time than several visits. We’ll send you a clear quote for the lot.
Why us?
- A choice of colours where the product allows
- Sealant colour chosen to suit
- Colour agreed with you before work begins
- 180+ five-star Google reviews