Hampshire · England
Northbrook New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for Northbrook, backed by a 12-month guarantee. Ask us for a quote.
- Cracks appearing as a new home settles
- Cracked sealant around new window and door frames
- Beads laid onto grit and dust from the build
How we handle new build mastic in Northbrook
A new build should have a neat, sound bead at every joint. When the finish is smeared, patchy or already cracking, it’s worth putting right early, before water gets into the floor or walls. We work on bathrooms & en suites, skirting & floors and kitchens, and people most often call us about shower seals failing in the first year or two and cracked sealant around new window and door frames.
Work in a small place like Northbrook just needs the journey and access planning, and once on site, the job is the same as anywhere.
Every job is covered by a 12-month guarantee.
- Place
- Northbrook (SO21)
- Region
- Hampshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Common problems we fix in Northbrook
Sealant is often one of the last jobs before handover. Joints aren’t always cleaned of dust or primed, so the bead never bonds properly.
Keep an eye out for any of the following:
- Skirting joints opening in the first winter
- Messy sealant that spoils new finishes
- Gaps behind new kitchen upstands
- Leaking shower tray seals in a new home
For new homes near Micheldever station, it’s worth checking the sealant early, while snags are still fresh.
Questions to ask before booking
- How long the guarantee is
- Which colour the sealant will be
- Whether they seal over old material or remove it
- How the surfaces are prepared before sealing
Joints and finishes in Northbrook homes
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.
In and around Northbrook, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Northbrook is about 7 miles north of Winchester, in Hampshire. Northbrook gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across Hampshire, we cover 683 places, Northbrook among them. You can also see our page for Southampton, about 17 miles away.
We cover every part of SO21 for new build mastic and the streets around it. We also cover Micheldever (1 mile south-east), Stoke Charity (1 mile west), Hunton (2 miles west), Micheldever Station (2 miles north) and East Stratton (2 miles east). Within a short drive, we also cover Basingstoke (11 miles north-east), Winchester (7 miles south), Eastleigh (13 miles south), Andover (10 miles north-west), Chandler's Ford (13 miles south-west) and Alton (13 miles east).
Landmarks near Northbrook
Typical jobs here are in homes near Half Moon and Spread Eagle pub, among other places. Northbrook’s nearest station is Micheldever station, roughly 2.1 miles north of the centre.
Northbrook: your questions answered
Can you do new build mastic in Northbrook?
Yes, Northbrook is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
I let a flat near Micheldever station. Can you help?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
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.
Is the work guaranteed?
Yes. There’s a 12-month guarantee on every job, large or small.
Is there any odour?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Are you insured?
Yes, we are fully insured for every job we do.
Aftercare tips
After the cure time, these simple habits help:
- Follow the cure time we give you
- Avoid scourers and strong chemicals on sealant
- Check bath and shower seals every few months as the house settles
- Ventilate bathrooms well, especially in the first year
Avoid standing on the rim of the bath or the edge of the tray. If a bath or tray moves when you stand in it, get it looked at.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Small faults turn into leaks if left.
Places near Northbrook
Also in Northbrook
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
How the visit works
The work is kept neat and contained to the area we are working on, so you can get on with your day. Expect the work to take anything from a few hours to several days, depending on the number of plots. In a small place like Northbrook, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we work through your snagging list or plot schedule with you.
- We cut out every bit of the failed or messy sealant.
- Surfaces are cleaned of building dust and primed where needed.
- A sealant chosen for each area goes in and is tooled smooth.
- Finally, each room is checked and you’re given the cure time.
How to prepare
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
- On commercial sites, let us know about site rules
Getting a quote
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or send us an email.
Related advice
Different surfaces, different methods
Show homes
In a show home, the sealant is on display. We lay neat, even beads in colours to suit the finishes.
Skirting and floors
Wet-area floor joints need a flexible seal. We seal them with a sealant suited to wet areas.
Landlord and commercial work in Northbrook
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
If you manage several properties in or around Northbrook, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
Why deal with it now?
DIY kits do not solve the main problems with new-build sealant: dust, no primer and old sealant left in the joint. Cutting out, cleaning and priming are what make the difference. Where a wall is exposed, as many are in small places like Northbrook, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
Why Northbrook customers choose us
- Trusted Arbo and Everbuild sealants
- A choice of colours where the product allows
- Anti-fungal sanitary silicone in wet areas
- Any old sealant cut out fully, not covered over
Take a look at our cost guide and customer reviews.