West Sussex · England
Window & door mastic in Petworth, West Sussex
Window mastic in Petworth from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Untidy mastic left by window fitters
- Water coming in at the bottom corners of a door
- Cracked sealant at the sill ends
What sealant work can’t fix
New sealant cannot fix everything, and we will tell you before we start. It will not solve:
- Draughts through the window seals rather than the frame
- Condensation trapped between the panes
- A sash or casement that will not close properly
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Petworth
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- uPVC windows
- Window sills
- Composite doors
How we handle window mastic in Petworth
From a single sill to a whole house of windows, you will get a clear quote before work begins. Just ring 0345 464 0079 or email us and tell us how many frames there are and how they’re reached. If you have a bead that doesn’t match the frame and draughty joints inside around the window, we can put it right, on composite doors, uPVC windows and timber windows & doors alike.
Mastic can only go onto a dry, clean joint, so window work in Petworth is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Petworth (GU28)
- Wider area
- West Sussex
- Cover
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
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.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What window mastic looks like in Petworth
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 Petworth House (about 0.3 miles north) nearby, there’s older building stock in the area around Petworth as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
If you live in an older home near Sacred Heart Church, the joint between an old wall and a newer frame is usually the first place rain gets in. Schools such as Petworth Cof E Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Petworth is about 12 miles north-east of Chichester, in West Sussex. Wherever you are in the GU28 postcode area, we can carry out window mastic at your property. Across West Sussex, we cover 371 places, Petworth among them. You can also see our page for Crawley, roughly 20 miles from Petworth.
Here we cover the GU28 postcode area for window mastic. Streets in the area include Station Road, Back Lane and Rosemary Lane, all of which we cover. Main roads around Petworth include the A272 and A283, which makes travel easy. If you’re just outside Petworth, we cover Hampers Green (1 mile north), Haslingbourne (1 mile south-east), Tillington (1 mile west), Rotherbridge (1 mile south-west) and Upperton (1 mile north-west). Further out, we also cover Horsham (14 miles north-east), Worthing (14 miles south-east), Bognor Regis (14 miles south), Chichester (12 miles south-west), Littlehampton (12 miles south) and Rustington (13 miles south).
Landmarks near Petworth
Typical jobs here are in homes near The Old Square Tavern. Petworth’s nearest station is Pulborough station, roughly 4.4 miles south-east. Nearby you’ll also find Coates Castle (2.6 miles south) and Coultershaw Heritage Site (1.2 miles south). Not far away are The Mens.
Surface by surface
Window sills
Stone and concrete sills have their own joints, including the one between the sill and the frame above. Those are sealed with a product suited to stone or concrete.
Composite doors
A composite door generally sits in a plastic outer frame, and the joint around it is sealed like a window. We match the colour to the frame.
Quotes for window mastic in Petworth
Your quote is based on your job. We take into account:
- The number and length of the joints
- How easy the joints are to reach
- The number of rooms or windows
- The old material and how stubborn it is
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, phone 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- Any previous sealing or DIY work
- How we’d reach the joints
- The type of property
- Pictures of the joints, sent by email
Need a quote? Please call 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Aftercare tips
To keep the joints looking good and working properly:
- Keep timber frames painted
- Avoid blasting the frames with a pressure washer
- Walk round the house once a year and look at the joints
- Clean frames with a soft cloth and soapy water
A yearly look round the frames is enough. Small splits are simple to catch before they leak, and if anything looks wrong, just phone 0345 464 0079 or email us.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. Resealing closes it.
Signs you need window mastic in Petworth
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
People generally contact us when they notice one of these:
- Cracked internal joints between frame and plaster
- Black, perished sealant on frames
- Untidy mastic left by window fitters
- Rain getting in at the frame or under the sill
Letting a property close to Pulborough station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Before you book anyone
- How the surfaces are prepared before sealing
- What guarantee comes with the work
- Is VAT in the price?
- Whether they’re fully insured
Petworth: your questions answered
Do you work for landlords with property near Pulborough station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Is Petworth within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you have insurance?
Yes. We are fully insured for domestic and commercial work.
Can I do it myself?
That depends on the joint. 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.
Can new window sealant be painted?
Not generally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
How long will my window job take?
Allow most of a day for a typical house, less for a few frames. Access and the amount of old mastic make the biggest difference.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Towns and villages near Petworth
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What happens on the day
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it normally takes most of a day for a typical house, less for a few frames. For a village or hamlet like Petworth, the journey is planned in advance: 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.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Let us know about parking restrictions
- Keep pets and children clear of the area while we work
- Let us know about earlier repairs to the joints
How to get a quote
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.