West Sussex · England
New Build Mastic in South Mundham
New-build sealant joints in South Mundham need attention? We cut out the old, prepare the joints and apply the right sealant.
- Sealant work across a run of new homes
- Leaking shower tray seals in a new home
- Cracked caulk along new skirting
New homes and floors in South Mundham
South Mundham is close to the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so it’s worth checking at snagging. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For new homes near Chichester station, it’s worth checking the sealant early, while snags are still fresh.
South Mundham is about 3 miles south of Chichester, in West Sussex. For new build mastic in and around South Mundham, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We are based in Crawley and cover West Sussex, South Mundham included. Across West Sussex, we cover 371 places, South Mundham among them. You can also see our page for Portsmouth, roughly 14 miles from South Mundham.
Postcode districts we cover here for new build mastic: PO20. Whether your property is on Manor Lane and Honer Lane or a nearby road, our applicators can take on the job. Close by, we work in Fisher (1 mile west), Street End (2 miles south-west), Sidlesham Common (2 miles west), Nyetimber (2 miles south-east) and Sidlesham (2 miles south-west). Further out, we also cover Bognor Regis (3 miles east), Chichester (3 miles north), Selsey (5 miles south), Littlehampton (10 miles east), Emsworth (9 miles north-west) and Rustington (11 miles east).
Near you in South Mundham
Locally, jobs take us to homes and businesses close to Chichester High School For Girls and Avisford. The closest station to South Mundham is Chichester station, roughly 2.5 miles north-west. Other landmarks nearby include Chichester Castle (3 miles north) and Chichester Cathedral Treasury (2.7 miles north-west).
New build mastic in South Mundham, done properly
We never seal over a failed new-build bead. New silicone will not bond to old silicone, so the joint is cut out, cleaned, dried and resealed. If you are dealing with smeared, uneven beads picked up at snagging and joints pulling apart as timber shrinks, we can put it right.
Older homes in small places like South Mundham often have timber floors that move with the seasons, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
Every job comes with our 12-month guarantee.
- Where
- South Mundham (PO20)
- Region
- West Sussex
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near South Mundham
What else we do in South Mundham
Quotes for new build mastic in South Mundham
Some jobs are bigger than they look, and some smaller. The main factors:
- How many areas need sealing
- Whether old sealant or filler has to be cut out
- The size of the job
- The type of sealant required
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Helping us quote
You don’t need to know the technical terms. It helps if you can tell us:
- Any access issues, like height or stairs
- Whether it has been sealed before
- The rough size of the job
- Whether it’s a home or a business
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you’re ready, call 0345 464 0079 or email us.
Questions from South Mundham
Can you help a landlord with a rental near Chichester station?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
Do you cover smaller places like South Mundham?
Yes. South Mundham is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How long will you be here?
A typical job takes anything from a few hours to several days, depending on the number of plots, including the preparation. We will confirm how long when we quote.
Do I have to be there?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
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.
Are you fully insured?
Yes. We’re fully insured.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What do you need from me for a quote?
A short description and the location, with photos by email if possible. If we need more, we’ll ask.
What sealant work cannot fix
New sealant cannot fix everything, and we’d rather say so up front. It will not solve:
- Leaking fittings rather than failed sealant
- Movement caused by a poorly fitted tray or bath
- Cracking that points to a structural problem
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer before booking.
Joints and surfaces we work on
- Show homes
- Bathrooms & en suites
- Windows & doors
- Plot handovers
- Skirting & floors
- Kitchens
What happens if it’s left?
Sealant done properly at handover means fewer callbacks. Every return visit for a failed seal takes time and most come down to preparation. Around South Mundham, 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. If you’re not sure whether it needs doing, call 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
What you get with us
- A choice of colours where the product allows
- Domestic, commercial and hotel work
- We are fully insured
- A sealant colour to suit the surroundings
Take a look at our cost guide or customer reviews.
Do you need new build mastic in South Mundham?
Sealant applied onto damp surfaces doesn’t bond well. On a busy site, joints are not always given time to dry first.
Common reasons people contact us include:
- New-build shower sealant that has already split
- Sealant applied over dusty or wet surfaces
- Plot mastic for developers ahead of handover
- Internal frame sealant that has split
In and around South Mundham, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
What your quote should include
- What product goes in the joint
- How the surfaces are prepared before sealing
- Is the old sealant removed completely?
- What the cure time is
How the visit works
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. It generally takes a few hours in a single home. For a village or hamlet like South Mundham, 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, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out.
- Joints are vacuumed and cleaned of building dust.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Mention any tricky access
- On commercial sites, let us know about site rules
Ask for a quote
For a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.
Advice
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Report sealant problems to your builder during the snagging period
- Get a leaking seal dealt with right away
- Resist patching a failed seal with a tube from the DIY shop
- Check bath and shower seals every few months as the house settles
Follow the cure time we give you before the area gets wet. Most silicones need around a day.
Mould takes hold quickly in sealant that has gaps or lifted edges. Resealing before mould gets in saves a harder job later.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
If you’ve already had a go yourself, that is fine. We cut it out and start again.