Hampshire · England
New Build Mastic in Alton
We cover Alton for plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly.
- Sealant that never bonded to the surface
- Shower seals failing in the first year or two
- Cracks appearing as a new home settles
Alton questions
Is there a guarantee on new build mastic in Alton?
All our work, in Alton and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Do you cover Alton for new build mastic?
Yes. Our work covers London and the South East, and Alton is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing, and we’ll give you a clear price.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Will it make 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.
Do you use white or clear sealant?
The colour is chosen to suit the tiles, worktop or frame. Tell us what you’d like when you get a quote.
Do you take on second-fix sealing for builders?
Yes. We take on second-fix sealant work across new plots. We clean and prime joints properly to keep callbacks down.
How long before the joint can be used?
That depends on the sealant used, so follow the cure time we give you.
Can landlords and businesses book you?
Yes, we do. We work in homes, commercial premises and hotels.
New build mastic in Alton, done properly
We work in new homes and on new-build sites across Alton. Whether it’s one en suite or a run of plots, the method is the same: remove, clean, prime where needed, then a neat new bead. Common call-outs are for cracked sealant around new window and door frames and shower seals failing in the first year or two, on skirting & floors, bathrooms & en suites and windows & doors.
Homes around Alton move a little with the seasons, and skirting and floor joints show it first. Those joints need a flexible sealant, as rigid filler soon cracks out.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Place
- Alton (GU34)
- Region
- Hampshire
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Quotes for new build mastic in Alton
We quote each job individually. These are the things that affect it:
- The size of the job
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
- Access and height
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Asking for a quote
What to tell us when you ask for a quote:
- Photos by email, if that’s easy
- Whether it’s a home or a business
- Where the job is, and your postcode
- Roughly how big the job is
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that is easy.
Nearby places to Alton
Also in Alton
New build mastic around Alton
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For new homes near Alton station, it’s worth checking the sealant early, while snags are still fresh. In and around Alton, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Alton is about 10 miles south-east of Basingstoke, in Hampshire. If you need new build mastic in Alton, please ring 0345 464 0079 or drop us an email for a quick quote. We cover Hampshire from our Crawley base, Alton included. Across Hampshire, we cover 683 places, Alton among them. Our Reading page covers work nearby.
Our applicators cover all of GU34 for new build mastic and the streets around it. We cover properties on High Street, Station Road and Goswell Square and the roads around them. With the A339 and B3004 close by, Alton is easy for our applicators to reach. Nearby, we also carry out new build mastic in Chawton (1 mile south-west), Holybourne (2 miles north-east), Neatham (2 miles north-east), East Worldham (2 miles south-east) and Golden Pot (2 miles north). We also work in nearby towns such as Basingstoke (10 miles north-west), Farnborough (13 miles north-east), Fleet (10 miles north-east), Aldershot (11 miles north-east), Petersfield (10 miles south) and Yateley (14 miles north-east).
Around Alton
In Alton, that means homes and buildings near Amery Hill School, Treloar School and The 'Baker's Arms' Public House, among other places. Alton has its own railway station: Alton station. Other landmarks nearby include Allen Gallery (less than half a mile east) and Alton Community Hospital (0.9 miles south-west). The countryside around Alton includes Holybourne Hill.
DIY versus a professional finish
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
When something else is needed
We will always be straight with you, so here’s what new sealant will not do:
- Plumbing faults behind the sealant
- Cracking that points to a structural problem
- Damaged fittings that need replacing
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Alton
- Bathrooms & en suites
- Windows & doors
- Skirting & floors
- Plot handovers
- Show homes
- Kitchens
What happens on the day
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours in a single home. Parking in a town like Alton is normally straightforward, but tell us if there’s a driveway or any restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- First we work through your snagging list or plot schedule with you.
- The old bead comes out in full, with no layer left behind.
- Each joint is cleaned of dust and grit, then primed if required.
- A sealant chosen for each area goes in and is tooled smooth.
- Finally, each room is checked and you are given the cure time.
Getting ready for the visit
- Mention if the joints have been sealed before
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
Ask for a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved before giving you a price.
Advice
Different surfaces, different methods
Kitchens
As a new house dries, worktops and walls shift a little, which opens gaps along the back. We reseal them with a flexible sealant.
Plot handovers
Good preparation at handover saves snagging later. We clean out building dust before sealing and primer used where needed.
Why it’s worth doing now in Alton
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it can’t bond to what’s underneath. Taking it all out and starting again is the only way to get a lasting seal. In a family home in Alton, a failed seal around a bath or a frame lets water into places you cannot see, like the floor under a bath, the back of a panel or the inside of a wall. Whatever the joint, failed sealant only gets worse.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first.
What you get with us
- Over 20 years’ experience
- Anti-fungal silicone where joints get wet
- An ARBOMaster approved applicator
- We never seal over old sealant
See our cost guide or our reviews.