Hampshire · England
New-build mastic & snagging in Perham Down, Hampshire
Plot mastic for developers and snagging failed sealant in new homes in Perham Down, with a one-year guarantee on every job. Call for a quick quote.
- New-build shower sealant that has already split
- Second-fix sealing on new plots
- Kitchen sealant that has pulled off the wall
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
New build mastic in Perham Down, done properly
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. We work on kitchens, show homes and windows & doors, and common reasons people get in touch are beads laid onto grit and dust from the build and leaking shower tray seals in a new home.
Older homes in small places like Perham Down often have timber floors that move with the seasons, which is why skirting and threshold joints need a flexible sealant, not filler.
You’re covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or email us.
- Location
- Perham Down (SP11)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How we quote for new build mastic
Every job gets its own quote. This is what makes a difference:
- The number and length of the joints
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- Working hours on commercial sites
The cost depends on how much there is to do, how hard the old material is to remove and access to the work. We give a clear quote before we start, so you know where you stand.
What to tell us for a quote
To make quoting easier, let us know:
- What’s wrong with the joints now
- Where the property is
- If someone has resealed it before
- Access, such as stairs, a lift or height
Want a quote for new build mastic? Please ring 0345 464 0079 or email us with a few details. We’ll explain what we’d do and give you a clear price before work begins.
Why deal with it now?
Resealing everything on a snagging list in one visit is normally simpler than chasing joints one at a time. You get one visit and one clear quote for the lot. Older cottages and farmhouses around Perham Down can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or send us an email.
Why choose Mr Mastic in Perham Down
- Fully insured
- Quality sealants from Arbo and Everbuild
- 20+ years of sealant experience
- A sealant colour to suit the surroundings
Read what affects the cost or customer reviews.
What new build mastic looks like in Perham 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 Grateley station, the sealant around baths, showers and frames is worth checking in the first year or two. Around Perham Down, as everywhere, new build mastic is only as good as the preparation behind it.
Perham Down is about 7 miles west of Andover, in Hampshire. Jobs in Perham Down get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Across Hampshire, we cover 683 places, Perham Down among them. We also work in Southampton, about 25 miles from Perham Down.
Postcode districts we cover here for new build mastic: SP11. Local streets include Perth Road, Somme Road and Upnor Close. If you are just outside Perham Down, we cover Great Shoddesden (1 mile east), Ludgershall (1 mile north), Tidworth (1 mile west), Kimpton (2 miles south-east) and Shipton Bellinger (3 miles south-west). Within a short drive, we also cover Andover (7 miles east), Whitchurch (13 miles east), East Anton (7 miles east), Picket Piece (8 miles east), Picket Twenty (8 miles east) and Finkley Down (8 miles east).
Near you in Perham Down
The closest station to Perham Down is Grateley station, roughly 4.9 miles south of the centre. Well-known places in the area include Ludgershall Castle (1.3 miles north). Green spaces nearby include Quarley Hill.
Places near Perham Down
More services for Perham Down
Perham Down questions
Is Perham 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.
Do you cover Perham Down for new build mastic?
Yes, Perham Down is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear price.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
How long does new build mastic take?
As a guide, most jobs take anything from a few hours to several days, depending on the number of plots. Bigger jobs take longer, and we’ll say how long yours will take.
What colour sealant will you use?
Most bathroom joints are white or clear, but sealant comes in other colours too. We match the colour to the finish before we begin.
Why does sealant fail so quickly in new builds?
There are usually two causes: movement as the house dries and settles, and sealant laid onto dust without primer. A proper reseal deals with both.
Can you do several jobs on one visit?
Yes. Several rooms, windows or areas can go on one quote.
Is it worth trying it myself?
It depends on the job. 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.
The process
You do not need to clear the whole room or building before we come, just the space around the work. We protect the rest, and the job takes a few hours for most snagging lists, longer for a run of plots for a typical job. Somewhere as small as Perham Down, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we work through your snagging list or plot schedule with you.
- We cut out every bit of the failed or messy sealant.
- We clean off dust from the build and prime the surfaces where the product needs it.
- A sealant chosen for each area goes in and is tooled smooth.
- Finally, each room is checked and you are given the cure time.
How to prepare
- Keep pets and children clear of the area while we work
- Clear items away from the joints we’re working on
- Mention if the joints have been sealed before
Ask for a quote
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or send us an email and describe the job, and photos are welcome.
Related advice
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Settlement cracks that need a surveyor
- Baths and trays that move too much for sealant to cope with
- Cracked trays, tiles or worktops
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Kitchens
- Show homes
- Bathrooms & en suites
- Skirting & floors
- Plot handovers
- Windows & doors
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Act quickly if a seal starts to leak
- Open a window or run the fan after bathing
- Clean sealant with mild detergent, not abrasives
- Watch for new gaps as the house dries out
Keep the bathroom ventilated, especially in the first year. Use the extractor fan or open a window after showers to help keep mould away.
If a shower tray or bath seal splits in the first year, look for movement. Have it resealed, and the tray or bath checked, before it gets worse.
Landlord and commercial work in Perham Down
We also work for property managers and facilities teams in Perham Down and across Hampshire. We can quote a run of properties together.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.