Brighton and Hove · England
Window & door mastic in Stanmer, Brighton and Hove
Window mastic in Stanmer from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Gaps left after new windows were fitted
- Rain getting in at the frame or under the sill
- Cracked sealant at the sill ends
Window mastic in Stanmer, done properly
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. Typical jobs include old mastic that has gone black or come away and rain getting in at the frame or under the sill, across composite doors, aluminium frames and window sills.
Homes in small places like Stanmer often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Stanmer (BN1)
- Region
- Brighton and Hove
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Landlord and commercial work in Stanmer
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
What happens if it’s left?
If you are painting or rendering, reseal at the same time. A clean new bead makes new paint or render look finished. Where a wall is exposed, as many are in small places like Stanmer, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What you get with us
- Sealant colour chosen to suit
- 12-month guarantee on every job
- Colour agreed with you before work begins
- Neat joints and a tidy finish
Take a look at our cost guide or what customers say.
How the job changes by surface
Patio & French doors
Not every patio door leak is a mastic problem: blocked drain slots, worn brush seals and threshold details can let water in too. We look for the cause first.
Composite doors
Draughts round the door leaf generally come from worn seals or adjustment, not the mastic. We will tell you if that is what we find.
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Avoid blasting the frames with a pressure washer
- Wash the frames with mild soapy water
- Look round the frames every year or so
- Keep timber frames painted
A yearly look round the frames is enough. Small splits are simple to catch before they leak, and if anything looks wrong, just ring 0345 464 0079 or email us.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.
Honest limits
New sealant can’t fix everything, and we will tell you before work begins. It will not solve:
- Worn gaskets, brush seals or a door that has dropped
- Broken hinges, locks or handles
- Penetrating damp from a failed cavity tray or render
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly before you book.
Where we work in Stanmer
- Window sills
- uPVC windows
- Timber windows & doors
- Composite doors
- Aluminium frames
- Patio & French doors
Questions from Stanmer
Is Stanmer in your area for window mastic?
Yes. We work across London and the South East, and Stanmer is part of that. You can call 0345 464 0079 or email us and let us know what needs doing.
Can you help a landlord with a rental near Falmer station?
Yes. We work for landlords and agents as well as homeowners. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
What does window mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
Where do you work from?
We work from Crawley. We cover Stanmer and the rest of Brighton and Hove, along with the rest of our area.
Do you have sealant for grey or black windows?
Yes. We can use white, brown, anthracite grey, black or clear.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Nearby places to Stanmer
Also in Stanmer
What happens on the day
There isn’t much for you to do on the day. 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 Stanmer needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Try not to wet indoor joints just before the visit
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you are ready, phone 0345 464 0079 or drop us an email.
Read more
What we are called out for in Stanmer
Joints that are too thin or too deep fail early. A skim of sealant over a wide gap soon tears, while a joint packed solid can’t stretch. That’s what backing rod is for.
The problems people usually mention when they call are:
- Damp patches on the reveal after heavy rain
- Draughts coming in around windows and doors
- A bead that doesn’t match the frame
- Gaps left after new windows were fitted
If you live in an older home near Stanmer Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What your quote should include
- What happens if they find a problem under the old sealant
- How long the guarantee is
- How the colour is chosen
- Which sealant they’ll use, and why
Stanmer homes and the weather
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Preston Manor & Gardens (about 2.8 miles south-west) nearby, there’s older building stock in the area around Stanmer as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Schools such as Coldean Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Falmer station, renewing tired window mastic between tenants heads off draught and damp complaints.
Stanmer is about 3 miles north-east of Brighton, in Brighton and Hove. Jobs in Stanmer get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Across Brighton and Hove, we cover 30 places, Stanmer among them.
Postcode districts we cover here for window mastic: BN1. We also cover Hollingbury (1 mile south-west), Moulsecoomb (2 miles south), Bevendean (2 miles south), Patcham (2 miles west) and Hollingdean (2 miles south-west). Within a short drive, we also cover Brighton (3 miles south-west), Brighton and Hove (4 miles south-west), Hove (4 miles south-west), Carlton Hill (3 miles south), Hanover (3 miles south) and West Hill (3 miles south-west).
What’s near Stanmer
Around Stanmer, our work takes us to homes and buildings near Stanmer Park, University of Sussex Library and Brighton Aldridge Community Academy, among other places. The closest station to Stanmer is Falmer station, roughly 0.8 miles south-east. Nearby you will also find Clayton Castle (3.4 miles north-west) and Churchill Square (3.7 miles south-west). For a walk, there’s Ditchling Beacon and Ladies Mile.