Hampshire · England
Worthy Down New Build Mastic
New build mastic in Worthy Down from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Smeared, uneven beads picked up at snagging
- Gaps opening as the house dries out and settles
- Internal frame sealant that has split
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
For anyone letting property in or around Worthy Down, several properties can go on one quote. Send us the addresses and the work at each, and photos by email help.
New build mastic for homes and businesses in Worthy Down
In a new home, every joint should have a clean, even bead. Smeared, patchy or cracked sealant is worth sorting early, before water reaches anything behind it. If you have gaps behind new kitchen upstands and sealant that never bonded to the surface, we can put it right.
Older homes in small places like Worthy Down often have timber floors that move with the seasons, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
All our work is covered by our 12-month guarantee, wherever you are in Hampshire.
- Where
- Worthy Down (SO21)
- Region
- Hampshire
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
New build mastic around Worthy Down
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you’ve bought a new home near Winchester station, the sealant around baths, showers and frames is worth checking in the first year or two.
Worthy Down is about 4 miles north of Winchester, in Hampshire. Jobs in Worthy Down get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Our area takes in 683 places across Hampshire, large and small. Southampton is on our list too, around 14 miles away.
Jobs for new build mastic in SO21 is quoted and booked the same way as anywhere else. Local streets include Coopers Close, Coate Drive and Wellesley Drive, all of which we cover. Close by, we work in South Wonston (1 mile north), Springvale (2 miles south-east), Crawley (3 miles west), Sutton Scotney (3 miles north) and Stoke Charity (3 miles north-east). We also work in nearby towns such as Basingstoke (15 miles north-east), Winchester (4 miles south), Eastleigh (10 miles south), Andover (9 miles north-west), Totton (15 miles south-west) and Chandler's Ford (9 miles south).
What’s near Worthy Down
Around Worthy Down, our work takes us to homes and buildings near Henry Beaufort School. The closest station to Worthy Down is Winchester station, roughly 3.2 miles south. Other landmarks nearby include Royal Hampshire County Hospital (3.5 miles south) and Royal Observer Corps Museum (2.7 miles south-east). For a walk, there’s Winnall Moors.
What happens on the day
You don’t need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the job takes anything from a few hours to several days, depending on the number of plots in most cases. Somewhere as small as Worthy Down, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely down to clean surfaces.
- 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
- Clear the area around the work
- Plan for the work area to be out of bounds to pets and children
- Let us know about earlier repairs to the joints
Getting a quote
Asking for a quote is easy: tell us what needs doing and where and its rough size. A few photos by email make the job easier to understand.
Related advice
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Also in Worthy Down
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Baths and trays that move too much for sealant to cope with
- Leaks from pipes, valves or wastes, which need a plumber
- Damaged fittings that need replacing
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think before booking.
Joints and surfaces we work on
- Skirting & floors
- Bathrooms & en suites
- Plot handovers
- Show homes
- Windows & doors
- Kitchens
Worthy Down: your questions answered
I let a flat near Winchester station. Can you help?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Is Worthy Down within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Are you fully insured?
Yes, we’re fully insured for domestic and commercial work.
Where is Mr Mastic based?
We’re a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Should I wait before resealing?
If the seal has failed and water is getting in, do it now. Hairline cosmetic gaps can wait until the house has settled.
Can you match the sealant colour to my new kitchen or bathroom?
Most bathroom joints are white or clear, but other colours are available. We match the colour to the finish.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in.
Do you work through snagging lists?
Yes. We often work straight from a snagging list. We’ll go through the sealant items and agree what we’ll do.
Signs you need new build mastic in Worthy Down
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops and cracked sealant shows up.
People normally contact us when they notice something like this:
- Skirting joints opening in the first winter
- Gaps behind new kitchen upstands
- Second-fix sealing on new plots
- Leaking shower tray seals in a new home
In and around Worthy Down, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Questions to ask before you book
- Is the old sealant removed completely?
- How much experience the applicator has
- Which sealant they’ll use, and why
- What happens if the job turns out different
Quotes for new build mastic in Worthy Down
You’ll get a clear quote before any work starts. It takes into account:
- How many areas need sealing
- The size of the job
- Whether old sealant or filler has to be cut out
- Access and height
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Access, such as stairs, a lift or height
- The problem you’ve noticed
- Photos by email, if that is easy
- Any previous sealing or DIY work
We quote each job on its own. Just ring 0345 464 0079 or drop us an email with the details, and photos are welcome.
Different surfaces, different methods
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. It’s resealed with an exterior sealant suited to the frame and wall.
Kitchens
New-kitchen sealant is often applied in a rush. We take it out and reseal neatly, colour-matched where it shows.
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.