West Sussex · England
Window Mastic in Rowfant
Window mastic for Rowfant, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- A bead that does not match the frame
- Cracked or shrunken mastic around the frame
- Damp patches on the reveal after heavy rain
About our window mastic in Rowfant
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That’s why the joint needs a flexible, low-modulus sealant rather than something rigid. We work on patio & French doors, window sills and composite doors, and people most often call us about rushed sealant from a window installation and mastic that has split away from the wall.
Somewhere as small as Rowfant, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
You get a 12-month guarantee, the same in Rowfant as everywhere else we work.
- Where
- Rowfant (RH10)
- Wider area
- West Sussex
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Common problems we fix in Rowfant
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, leaving a hairline gap down one side.
The problems people usually mention when they call are:
- Mastic that has split away from the wall
- Rain getting in at the frame or under the sill
- Rushed sealant from a window installation
- Black, perished sealant on frames
Rented homes near Three Bridges station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
What to look for in a quote
- Who does the work, and how experienced they are
- How the colour is chosen
- Are they insured?
- How hidden problems are handled
Surface by surface
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.
Window sills
Sills catch the water running down the glass, so the sill ends and the joint under the frame are vital. They’re cut out and resealed with exterior sealant.
Towns and villages near Rowfant
What else we do in Rowfant
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Repaint timber before it’s bare
- Do not use solvent cleaners on the joint
- Do not aim a pressure washer at the joints
- Keep drainage slots and sill grooves clear
Silicone cannot generally be painted, so mention any painting plans before we start. We can use a paintable sealant where that matters.
Water gets in quietly when mastic fails. You might not see it until plaster blows or a damp patch appears inside. Catching it early keeps the fix to a reseal.
How we quote for window mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Access and height
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
Combining jobs into one visit normally makes better use of the time than several visits. You will get one clear quote for the whole job.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Photos by email, if that’s easy
- The address or postcode of the job
- Access, such as stairs, a lift or height
- The type of property
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we’ll take it from there.
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 matched to the joint and its conditions.
If you’re set on DIY, put the effort into 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.
What we can’t put right
Some problems need a builder, plumber or other trade rather than us:
- Broken hinges, locks or handles
- Rotten timber, which needs a joiner first
- A door that needs adjusting, rehanging or new seals
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
Joints and surfaces we work on
- Patio & French doors
- uPVC windows
- Window sills
- Aluminium frames
- Timber windows & doors
- Composite doors
Window mastic in Rowfant: local notes
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. With historic houses such as Gravetye Manor (about 2.7 miles south-east) nearby, there’s older building stock in the area around Rowfant as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Managing a site like Turners Hill CofE Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. In the older streets around All Saints Parish Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
Rowfant is about 4 miles east of Crawley, in West Sussex. Homes, rented property, offices and hotels in Rowfant can book us for window mastic. Every job comes with our one-year guarantee. 371 places in West Sussex are on our list, from the larger towns to small villages.
We work across the RH10 postcode area for window mastic. If you’re just outside Rowfant, we cover Copthorne (2 miles north-west), Worth (2 miles west), Pound Hill (2 miles west), Maidenbower (2 miles south-west) and Keeper's Corner (2 miles north). Within a short drive, we also cover Crawley (4 miles west), Horsham (10 miles west), Haywards Heath (8 miles south), Burgess Hill (11 miles south), East Grinstead (4 miles east) and Broadfield (5 miles west).
Near you in Rowfant
Rowfant’s nearest station is Three Bridges station, about 2.6 miles west. Other landmarks nearby include County Mall (3.6 miles west) and Langley Green Hospital (4 miles west). For a walk, there’s Hedgecourt Lake.
How the visit works
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. Expect the work to take most of a day for a typical house, less for a few frames, and we explain the cure time before we leave. In a small place like Rowfant, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
For a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. We will send you a clear quote before any work starts.
Related advice
Common questions in Rowfant
Do you cover Rowfant for window mastic?
Yes. Our work covers London and the South East, and Rowfant is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Will you come out to Rowfant?
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.
Do you seal inside as well as outside?
Yes. Inside, the joint between frame and plaster is sealed neatly.
How long should I leave it?
That depends on the sealant used, so please follow the time we give you when we finish.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
Do you guarantee window mastic?
Yes. All our work carries a 12-month guarantee, and we’re fully insured.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new sealant bonds properly.