Brighton and Hove · England
Window Mastic in Withdean
Window mastic for Withdean, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- A bead that doesn’t match the frame
- Hard, cracked sealant around windows
- Whistling draughts around closed windows
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
We work for landlords and letting agents as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
Window mastic in Withdean, done properly
Whether it’s one leaking patio door or every frame on the house, the work is priced before anything is done. To get one, ring 0345 464 0079 or email us with the number of frames and any access details. If you have gaps left after new windows were fitted and rain getting in at the frame or under the sill, we can put it right, on patio & French doors, window sills and aluminium frames alike.
Around Withdean, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Withdean (BN1, BN3)
- Region
- Brighton and Hove
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens on the day
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take a morning for a couple of windows and a door. Parking around Withdean is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, ring 0345 464 0079 or drop us an email.
Related advice
Places near Withdean
Also in Withdean
What window mastic looks like in Withdean
Withdean is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around window and door frames, especially on the side facing the sea. 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.
For landlords with property near Preston Park station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. Schools such as St Bernadette's Catholic Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Withdean is about 2 miles north-west of Brighton, in Brighton and Hove. Withdean gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Withdean is one of 30 towns and villages in Brighton and Hove where we work for window mastic.
Every address in BN1 and BN3 is covered for window mastic. Streets in the area include Home Road, Croft Road and Bates Road, all of which we cover. Main roads around Withdean include the A23, which makes travel easy. Neighbouring places we cover for window mastic include Preston (1 mile south), Westdene (1 mile north-west), Prestonville (1 mile south), Patcham (1 mile north) and Hollingdean (1 mile south-east). Within a short drive, we also cover Kemptown (3 miles south-east), Whitehawk (3 miles south-east), Saltdean (6 miles south-east), East Saltdean (6 miles south-east), Roedean (3 miles south-east) and Rottingdean (5 miles south-east).
Local landmarks in Withdean
Locally, jobs take us to homes and businesses close to Dorothy Stringer High School, Varndean College and Withdean Park, among other places. There’s a railway station in Withdean itself: Preston Park station. Other landmarks nearby include Churchill Square (1.9 miles south) and Brighton Transport Museum (0.8 miles south). Green spaces nearby include Newmarket Hill and Ladies Mile.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Check the mastic once a year
- Paint up to the joint, not over it
- Keep drainage slots and sill grooves clear
- Keep timber frames painted
Keep the new mastic undisturbed while it cures, for as long as we advise. Keep jet washers away from the frames.
Signs to watch for: 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.
When to call us in Withdean
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar never bonded as it should, and it lets go sooner than it should.
People usually contact us after spotting one of these:
- Cracked sealant at the sill ends
- Whistling draughts around closed windows
- Draughty joints inside around the window
- Gaps left after new windows were fitted
For an older house near a landmark such as St John the Evangelist's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What to look for in a quote
- Who turns up on the day
- What the cure time is
- Whether the sealant suits the joint
- Whether VAT is included
Surface by surface
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A neat, narrow bead in a colour to match suits the frame.
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.
How we quote for window mastic
There’s no set price list, because no two jobs are the same. The quote depends on:
- How many areas need sealing
- Whether the work is at height
- The old material and how stubborn it is
- The number and length of the joints
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll explain what it covers.
Helping us quote
When you contact us, it’s useful to know:
- Photos by email, if that’s easy
- Any previous sealing or DIY work
- How many joints, rooms or windows are involved
- If it’s domestic, commercial or a hotel
For window mastic in Withdean, phone 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before work begins.
Withdean: your questions answered
Is Withdean within the area you cover?
Yes, Withdean is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
I let a flat near Preston Park station. Can you help?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Can you do the inside joint as well?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
Will you leave a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
How many windows can you do in a day?
It depends on access, the old mastic and the size of the frames. You will know the timing when we quote.
Will new mastic stop draughts?
In many cases. Air often gets in between the frame and the wall, and resealing inside and out closes it.
Can you match the sealant to my frames?
Yes, we choose a colour to suit the frame. Anthracite grey, black, brown and white cover most frames, with clear as an option.
Can you seal over the old sealant?
No. The old sealant always comes out first, so the new joint bonds to clean surfaces.