East Sussex · England
Window & door mastic in Cross in Hand, East Sussex
Mastic around window and door frames, sills and patio doors for householders, landlords and businesses in Cross in Hand. Fully insured, ARBOMaster approved and guaranteed for a year.
- Hard, cracked sealant around windows
- Leaking joints at the ends of sills
- Cold air getting in at the frame edge
Why it’s worth doing now in Cross in Hand
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. Around Cross in Hand, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why Cross in Hand clients choose us
- 20+ years of sealant experience
- 4.9 on Google from 180+ five-star reviews
- Experience in homes, commercial sites and hotels
- Fully insured
Take a look at our cost guide and our reviews.
Window mastic for homes and businesses in Cross in Hand
Frames and walls do not move together. Heat and cold make frames grow and shrink against brick or render that hardly moves. So the sealant has to stretch and recover, which is why we use a low-modulus product. We work on composite doors, uPVC windows and timber windows & doors, and the jobs we see most are leaking joints at the ends of sills and white mastic on grey or black frames.
Outdoor sealant needs dry, clean surfaces, so work on frames around Cross in Hand is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
All our work comes with our one-year guarantee, wherever you are in East Sussex.
- Where
- Cross in Hand (TN21)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Frames and glazing around Cross in Hand
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Cross-in-Hand Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as St Bartholomew, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Cross in Hand is about 5 miles east of Uckfield, in East Sussex. Wherever you are in the TN21 postcode area, we can carry out window mastic at your property. Cross in Hand is one of 289 towns and villages in East Sussex we cover for window mastic. For nearby work, see our Brighton page (18 miles or so).
Every address in TN21 is within our area for window mastic. Window mastic is available to properties on Fir Grove Road, Windmill Place and Dads Hill. We also cover the places around Cross in Hand: Roser's Cross (1 mile south-west), Waldron (1 mile south-west), Heathfield (2 miles east), Sandy Cross (2 miles south-east) and Lions Green (2 miles south). Within a short drive, we also cover Eastbourne (13 miles south), Bexhill-on-Sea (14 miles south-east), Seaford (14 miles south), Lewes (11 miles south-west), Hailsham (8 miles south) and Crowborough (6 miles north).
Near you in Cross in Hand
Locally, jobs take us to homes and businesses close to Passingworth Park. The closest station to Cross in Hand is Buxted station, roughly 3.9 miles west of the centre. Other landmarks nearby include Sussex Farm Museum (2.8 miles south) and Tickerage Castle (2.9 miles west). Not far away are Selwyns Wood.
Signs you need window mastic in Cross in Hand
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Signs it’s time to call us include:
- Sealant in the wrong colour for the frame
- Mastic that is falling out in pieces
- Mastic that has split away from the wall
- Draughts coming in around windows and doors
If you let a flat or house near Buxted station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Comparing quotes
- When the joint can take water or movement
- How the joint is cleaned and prepared
- How much experience the applicator has
- Is VAT in the price?
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Keep solvents and bleach off the sealant
- Clear any debris from frame drain holes
- Don’t paint over the silicone
- Wipe condensation off the frames
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
How the job changes by surface
Composite doors
A composite door usually sits in a plastic outer frame, and the joint around it is sealed like a window. The bead is colour-matched to the frame.
uPVC windows
uPVC expands and contracts noticeably with temperature, so we use a flexible, low-modulus sealant. We match white, brown, anthracite grey and black frames.
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Places near Cross in Hand
More services for Cross in Hand
Your questions about window mastic in Cross in Hand
Do you cover smaller places like Cross in Hand?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you cover Cross in Hand for window mastic?
Yes, Cross in Hand is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear price.
Do you work on first-floor windows?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we’ll confirm what’s needed.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we’re using and why.
Is the work guaranteed?
Yes. Each job is covered for 12 months, inside or out.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
Do you work for landlords and businesses?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels in Cross in Hand.
What happens on the day
We bring everything the job needs with us. After a quick look at the joints together, the area is protected and the work begins. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. Somewhere as small as Cross in Hand, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- 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.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Tell us if parking is tricky
- For business premises, tell us about site rules or sign-in
How to get a quote
There’s no standard price list. Instead, we give you a clear quote for your job. To arrange one, call 0345 464 0079 or email us.
Read more
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Penetrating damp from a failed cavity tray or render
- Draughts through the window seals rather than the frame
- Misting between the panes of a double-glazed unit (that needs a new unit)
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Timber windows & doors
- uPVC windows
- Aluminium frames
- Composite doors
- Patio & French doors
- Window sills