Hampshire · England
Balmerlawn New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Balmerlawn and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Kitchen sealant that has pulled off the wall
- Joints pulling apart as timber shrinks
- Sealant work across a run of new homes
The process
You do not need to clear the whole room or building before we come, only the area right around the joints. Everything nearby is protected, and the work takes a few hours in a single home for a typical job. In a small place like Balmerlawn, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked for movement before any work starts.
- We remove the failed sealant and clean the joints.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Mention any tricky access
- Clear items away from the joints we’re working on
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
For a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Read more
New build mastic for homes and businesses in Balmerlawn
Building dust is behind a lot of failed new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the sealant actually sticks instead of bonding to the dust. Common call-outs are for gaps opening as the house dries out and settles and messy sealant that spoils new finishes, on show homes, windows & doors and plot handovers.
Around Balmerlawn, older homes often have timber floors that move through the year, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
We stand behind the work with a one-year guarantee.
- Where
- Balmerlawn (SO42)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
New homes and floors in Balmerlawn
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you’ve bought a new home near Brockenhurst station, the sealant around baths, showers and frames is worth checking in the first year or two.
Balmerlawn is about 5 miles north of Lymington, in Hampshire. For new build mastic in and around Balmerlawn, please phone 0345 464 0079 or send us an email for a quick quote. We cover Hampshire from our Crawley base. Balmerlawn is one of 683 towns and villages in Hampshire we cover. Our Southampton page covers work nearby.
Every address in SO42 is within our area for new build mastic. Neighbouring places we cover for new build mastic include Brockenhurst (1 mile south-west), Setley (1 mile south), South Weirs (2 miles south-west), Lyndhurst (3 miles north) and Emery Down (3 miles north). We also work in nearby towns such as Eastleigh (14 miles north-east), Totton (7 miles north), Chandler's Ford (13 miles north-east), Hedge End (13 miles north-east), Lymington (5 miles south) and Romsey (12 miles north).
Around Balmerlawn
Typical jobs here are in homes near Rose And Crown Hotel and the streets around them. The nearest railway station is Brockenhurst station, about 0.9 miles south-west of the centre. Well-known places in the area include Lymington New Forest Hospital (4 miles south).
Do you need new build mastic in Balmerlawn?
The wrong product is sometimes used in the wrong place: caulk where water collects, or a rigid product on a moving joint. Both fail early.
Signs it’s time to call us include:
- Untidy sealant flagged on a snagging list
- Leaking shower tray seals in a new home
- Beads laid onto grit and dust from the build
- Cracks appearing as a new home settles
In and around Balmerlawn, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- Which sealant they’ll use, and why
- Whether they seal over old material or remove it
- How the colour is chosen
- How much experience the applicator has
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Balmerlawn questions
I let a flat near Brockenhurst station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover smaller places like Balmerlawn?
Yes, Balmerlawn is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Why does sealant fail so quickly in new builds?
A new house dries and settles for a year or two, and sealant is often applied quickly onto dusty surfaces. Either can make it fail early.
What colour sealant will you use?
We use white, clear or a colour to suit the finishes. Tell us what you’d like when you get a quote.
How long does the job take?
Most jobs take anything from a few hours to several days, depending on the number of plots, including preparation and clearing up. Your quote will say how long we expect yours to take.
Do you remove the old sealant?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
What information do you need?
Tell us what needs doing and where, plus pictures if you have them. If we need more, we will ask.
Can you do several jobs on one visit?
Of course. Doing several areas at once is generally more efficient.
What the job involves on each surface
Show homes
We seal show-home bathrooms, kitchens and frames ready for viewings. We’ll plan around viewing times.
Windows and doors
The gap between a new frame and its plaster reveal often opens up. We remove cracked sealant and apply a flexible one that suits the frame.
What we cannot put right
We won’t take on work that will not last, so these are the limits:
- Deciding who is responsible under a builder’s warranty
- Broken tiles or a split tray
- Baths and trays that move too much for sealant to cope with
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think before booking.
What we seal
- Plot handovers
- Skirting & floors
- Windows & doors
- Kitchens
- Show homes
- Bathrooms & en suites
Towns and villages near Balmerlawn
What else we do in Balmerlawn
Leave it or put it right?
A hairline gap at a skirting can wait, but water getting through can’t. Not sure whether yours can wait? You can ring 0345 464 0079 or email us with a few pictures and we’ll tell you. Around Balmerlawn, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why Balmerlawn customers choose us
- Domestic, commercial and hotel work
- More than 20 years in sealant work
- Rated 4.9 stars on Google
- Trusted Arbo and Everbuild sealants
Read our cost guide or customer reviews.
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Photograph failed sealant before it’s redone
- Check bath and shower seals every few months as the house settles
- Don’t seal over failed sealant yourself
- Open a window or run the fan after bathing
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry and can be resealed later.
Early snagging is easier snagging. Left alone, a small crack can become a leak.