West Sussex · England
Westhampnett Sand Mastic
Sand mastic across Westhampnett and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Modern sealant on a period surround
- Window mastic to renew ahead of painting
- Cement or filler used on old window joints that has cracked
Why it’s worth doing now in Westhampnett
Before painting the windows, it pays to renew the mastic. Paint over cracked mastic will not stop the gaps and traditional guidance is to leave the new mastic unpainted. In a small place like Westhampnett, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
The cost depends on how much there is to do, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts.
Why book with us
- Old sealant always removed completely
- Full insurance on every job
- Over 20 years’ experience
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at how sealant jobs are priced and our reviews.
Sand mastic in Westhampnett
On many period windows, sand mastic looks right and suits the building. Newer frames normally get a flexible sealant instead, and we will talk through which suits your home. Typical jobs include cracked mastic round a front door frame and old cement repairs round a window that have failed, on tenement windows, period & listed homes and brick reveals.
Around Westhampnett, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Westhampnett (PO18)
- Wider area
- West Sussex
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How it works
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we have agreed what’s being done, we protect the area and start. Most jobs take a few hours per window, depending on the condition of the joints. In a small place like Westhampnett, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Before we arrive
- Keep pets and children clear of the area while we work
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
Ask for a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work and send you a clear quote.
Related advice
Sand mastic in Westhampnett: local notes
Historic houses like Goodwood House (about 1.6 miles north) are a reminder that the area around Westhampnett has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around The Parish Church of St Peter, frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you let a flat or house near Chichester station, any sash windows need sound mastic to keep draughts and rain out.
Westhampnett is about 1 mile north-east of Chichester, in West Sussex. We provide sand mastic to homes and businesses in Westhampnett and nearby, as part of our work across West Sussex. Our West Sussex coverage runs to 371 places, Westhampnett among them. Our Portsmouth page covers work nearby (14 miles or so).
Work in PO18 is quoted and booked the same way as anywhere else. That includes homes and businesses on Hill Road, Sears Close and Hamilton Way. Neighbouring places we cover for sand mastic include Maudlin (1 mile east), Shopwyke (1 mile south-east), Westerton (1 mile north-east), Portfield (1 mile south-west) and Strettington (1 mile north-east). Larger places within reach include Bognor Regis (5 miles south-east), Selsey (8 miles south), Littlehampton (10 miles east), Emsworth (8 miles west), Rustington (11 miles east) and Storrington (14 miles east).
Landmarks near Westhampnett
In Westhampnett, that means homes and buildings near The Coach And Horses Public House, Westbourne House School and Chichester High School For Girls. Westhampnett’s nearest station is Chichester station, roughly 1.7 miles south-west. Nearby you’ll also find Chichester Castle (1.2 miles south-west) and Chichester Centre (0.8 miles west). The countryside around Westhampnett includes Stoke Down and Kingley Vale National Nature Reserve.
What affects the quote in Westhampnett
Your quote is based on your job. We look at:
- The size of the job
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
- Which sealant suits the joint
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or email us and we’ll talk you through it.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- The rough size of the job
- Where the property is
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. When it suits you, ring 0345 464 0079 or drop us an email.
Towns and villages near Westhampnett
Also in Westhampnett
What we can’t put right
To be straight with you, some problems need a different trade:
- Cracked or broken glass
- Damaged stone surrounds
- Whether work needs listed building consent
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Brick reveals
- Sash and case windows
- Tenement windows
- Timber door frames
- Stone surrounds
- Period & listed homes
Landlord and commercial work in Westhampnett
In hotels, rooms out of use cost money, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
Different surfaces, different methods
Stone surrounds
Old stone surrounds are often uneven, so the gap isn’t the same all the way round. Sand mastic is shaped by hand to suit.
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Westhampnett: your questions answered
Can you do sand mastic in Westhampnett?
Yes. We work across London and the South East, and Westhampnett is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
I let a flat near Chichester station. Can you help?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Can you replace silicone on a period window with sand mastic?
Often, yes. Once the silicone is out and the joint prepared we point it with sand mastic.
Are you fully insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us.
Should I try DIY first?
Sometimes. 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.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first.
Signs you need sand mastic in Westhampnett
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint.
The most common problems we see are:
- Mastic round period door frames that has failed
- Failed mastic on an exposed elevation
- Cement or filler used on old window joints that has cracked
- A silicone bead on a sash window that spoils the look
For site and facilities teams at buildings such as The March CofE Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- Is the old sealant removed completely?
- Who does the work, and how experienced they are
- How long to leave it before use
- How the surfaces are prepared before sealing