West Sussex · England
Window Mastic in Codmore Hill
Window mastic for Codmore Hill and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Hard, cracked sealant around windows
- Rain getting in at the frame or under the sill
- Leaking joints at the ends of sills
Window mastic in Codmore Hill, done properly
Every window and door frame has a gap around it, and mastic is what closes it. When it cracks, hardens or pulls away, draughts and rain get in. The old mastic is removed and the joint resealed with a flexible exterior sealant. If you have rain getting in at the frame or under the sill and gaps left after new windows were fitted, we can put it right.
Mastic can only go onto a dry, clean joint, so window work in Codmore Hill is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Codmore Hill (RH20)
- Region
- West Sussex
- Cover
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
The process
Every visit runs the same way: we check the joints, protect the area around them, carry out the job and tidy away. It generally takes most of a day for a typical house, less for a few frames. For a village or hamlet like Codmore Hill, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Mention any tricky access
- For business premises, tell us about site rules or sign-in
- Move anything stored near the joints
Getting a quote
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before we start.
Related advice
Codmore Hill: your questions answered
Can you do window mastic in Codmore Hill?
Yes. We work across London and the South East, and Codmore Hill is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we’ll send you a clear quote.
Will you come out to Codmore Hill?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Will you leave a mess?
Tidy work is part of the job. We protect what’s around the joints.
Can you do the inside joint as well?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We can do either or both.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Are you fully insured?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Common problems we fix in Codmore Hill
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
Look out for these signs:
- Untidy mastic left by window fitters
- Cracked sealant at the sill ends
- Rain getting in at the frame or under the sill
- Cold air getting in at the frame edge
In the older streets around The Parish Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- Whether you can choose the colour
- Is the old sealant removed completely?
- Whether VAT is included
- When the joint can take water or movement
What the job involves on each surface
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.
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. The threshold and the bottom corners take the most water, so we pay close attention there.
Towns and villages near Codmore Hill
What else we do in Codmore Hill
Codmore Hill homes and the weather
With historic houses such as Old Place Manor (about 1 mile south-west) nearby, there’s older building stock in the area around Codmore Hill as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as St Mary's Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Pulborough station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Codmore Hill is about 10 miles south-west of Horsham, in West Sussex. From the centre of Codmore Hill to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across West Sussex, we cover 371 places, Codmore Hill among them. Our Crawley page covers work nearby.
Work in RH20 works the same way as everywhere else we cover. Window mastic is available to properties on Masons Way, Hill Farm Lane and Stane Street. Nearby, we also carry out window mastic in Broomershill (1 mile south-east), North Heath (1 mile north-east), Nutbourne (1 mile south-east), Marehill (1 mile south-east) and Gay Street (2 miles east). Within a short drive, we also cover Horsham (10 miles north-east), Worthing (11 miles south-east), Bognor Regis (15 miles south-west), Chichester (15 miles south-west), Littlehampton (11 miles south) and Shoreham-by-Sea (14 miles south-east).
What’s near Codmore Hill
The closest station to Codmore Hill is Pulborough station, roughly 1.2 miles south-west. Other landmarks nearby include Coates Castle (4.2 miles west). Not far away are The Mens.
Honest limits
To be straight with you, there are a few things sealant won’t fix:
- A failed sealed unit that has misted up
- A sash or casement that won’t close properly
- Penetrating damp from a failed cavity tray or render
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Where we work in Codmore Hill
- Composite doors
- Aluminium frames
- Timber windows & doors
- Patio & French doors
- uPVC windows
- Window sills
How to look after the new joints
After the cure time, these simple habits help:
- Use gentle cleaners on frames and sealant
- Avoid harsh chemicals near the mastic
- Do not paint over the silicone
- Check the mastic once a year
Keep the new mastic undisturbed while it cures, for as long as we advise. Don’t point a pressure washer at the joints.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
What affects the cost of window mastic
You’ll get a clear quote before any work starts. It’s based on:
- The old material and how stubborn it is
- The product the joint needs
- The number and length of the joints
- Whether there’s mould to deal with
The cost reflects the work involved, not guesswork. That is why we ask a few questions first.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- If it’s domestic, commercial or a hotel
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.