Hampshire · England
New Build Mastic in Langstone
Plot mastic for developers and snagging failed sealant in new homes for Langstone, backed by a 12-month guarantee. Call for a quick quote.
- Smeared, uneven beads picked up at snagging
- Skirting joints opening in the first winter
- Second-fix sealing on new plots
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Wipe joints with warm soapy water
- Record problems with dated photos
- Keep water off fresh sealant until it has cured
- Do not wait for the house to settle if water is getting through
Wipe the sealant with warm soapy water. Avoid abrasive pads and strong solvents.
A seal that splits early is often a sign of movement. Have it resealed, and the tray or bath checked, before it gets worse.
About our new build mastic in Langstone
In a new home, every joint should have a clean, even bead. Smeared, patchy or cracked sealant is worth sorting early, before water gets into the floor or walls. Typical jobs include sealant work across a run of new homes and new-build shower sealant that has already split, across show homes, skirting & floors and kitchens.
Around Langstone, older homes often have timber floors that move through the year, which is why skirting and threshold joints need a flexible sealant, not filler.
You get a 12-month guarantee, the same in Langstone as everywhere else we work.
- Where
- Langstone (PO9, PO11)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Also near Langstone
Also in Langstone
Different surfaces, different methods
Windows and doors
On new builds, external frame sealant can be patchy. It’s resealed with an exterior sealant suited to the frame and wall.
Plot handovers
Developers can send the plot schedule and specification and we’ll quote. Sealant work across the plot is covered as agreed.
What sealant work cannot fix
New sealant cannot fix everything, and we’ll tell you before any work starts. Sealant won’t put right:
- Settlement cracks that need a surveyor
- Leaking fittings rather than failed sealant
- Deciding who is responsible under a builder’s warranty
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
What we seal
- Kitchens
- Skirting & floors
- Plot handovers
- Bathrooms & en suites
- Show homes
- Windows & doors
Why act early in Langstone
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Dealing with it early keeps the damage away from ceilings, floors and finishes. Older cottages and farmhouses around Langstone can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why us?
- Fully insured
- We agree the colour with you first
- We leave the area clean and tidy
- Colour picked to suit the job
Quotes for new build mastic in Langstone
Every job gets its own quote. These are the things that affect it:
- The product the joint needs
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- The number and length of the joints
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
- If someone has resealed it before
- The rough size of the job
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you’re ready, call 0345 464 0079 or send us an email.
Signs you need new build mastic in Langstone
A new house holds a lot of water from the build, which takes a year or two to dry out. Drying timber shrinks and pulls joints apart and the sealant has to cope with the movement.
Keep an eye out for any of the following:
- Messy sealant that spoils new finishes
- Cracked sealant around new window and door frames
- Second-fix sealing on new plots
- Skirting joints opening in the first winter
If you’ve bought a new home near Havant station, the sealant around baths, showers and frames is worth checking in the first year or two.
Questions to ask before booking
- Which colour the sealant will be
- How the surfaces are prepared before sealing
- When the joint can take water or movement
- How long the guarantee is
Joints and finishes in Langstone homes
Langstone is within about 1 mile of the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so it’s worth checking at snagging. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In and around Langstone, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Langstone is about 2 miles south of Havant, in Hampshire. Our applicators cover new build mastic for householders, landlords and businesses in Langstone and nearby, as part of our work across Hampshire. Langstone is one of 683 places in Hampshire we cover for new build mastic.
Every address in PO9 and PO11 is within our area for new build mastic. We cover properties on Mill Lane, Langstone Road and Langstone High Street. You’ll find Langstone on the A3023, which makes it straightforward to reach. Close by, we work in Warblington (1 mile east), Northney (1 mile south-east), Denvilles (1 mile north-east), Stoke (1 mile south) and North Hayling (1 mile south-east). We also work in nearby towns such as Gosport (8 miles west), Fareham (9 miles west), Horndean (5 miles north), Hedge End (15 miles west), Waterlooville (4 miles north-west) and Petersfield (12 miles north).
Near you in Langstone
We work in homes and buildings around The Royal Oak pub and Warblington School. For rail, the closest station is Havant station, roughly 1.1 miles north of the centre. Well-known places in the area include Warblington Castle (0.8 miles north-east) and Havant Museum (0.8 miles north). Not far away are Southmoor Nature Reserve.
Langstone: your questions answered
Will you come out to Langstone?
Yes. Langstone 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.
Do you work for landlords with property near Havant station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
Do you work for developers?
Yes. We carry out plot mastic and second-fix sealing for builders and developers. Send us the plot schedule and we’ll quote.
My new home is still under warranty. Should I contact you?
Your builder, if you’re still in their snagging or warranty period. If that does not work out, we are happy to quote.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Do you use white or clear sealant?
That depends on what the joint meets: white or clear in most bathrooms, and a colour to suit worktops, frames and floors elsewhere. We agree the colour before we start.
How it works
On the day, we start by going over the job with you. We protect the surfaces around the joints before any work begins. Most jobs take a few hours for most snagging lists, longer for a run of plots. Somewhere like Langstone needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out down to clean surfaces.
- We clean out the dust and grit left from the build.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
Before we arrive
- Mention any tricky access
- Clear items away from the joints we’re working on
- Try not to wet indoor joints just before the visit
Get a quote
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.