Hampshire · England
New-build mastic & snagging in Crawley, Hampshire
Plot mastic for developers and snagging failed sealant in new homes in Crawley, with a one-year guarantee on every job. Ask us for a quote.
- New-build shower sealant that has already split
- Gaps between new skirting and floors
- Sealant applied over dusty or wet surfaces
About our new build mastic in Crawley
Developers send us the plot schedule and we work through it. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over with a sealant suited to each area. We’re often asked to deal with second-fix sealing on new plots and cracks appearing as a new home settles, on plot handovers, bathrooms & en suites and windows & doors.
Older homes in small places like Crawley often have timber floors that move with the seasons, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Crawley (SO21)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Your questions about new build mastic in Crawley
Is Crawley in your area for new build mastic?
Yes. We work across London and the South East, and Crawley is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
Can you help a landlord with a rental near Winchester station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or email us with the details for a clear quote.
Where do you work from?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
What should I tell you?
Tell us what needs doing and where, with pictures by email if possible. If we need more, we will ask.
Is it normal for sealant to crack in a new home?
Cracking in the first couple of years is common as timber and plaster dry out. Poor preparation at handover adds to it.
Are you fully insured?
Yes. Full insurance covers our work.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Nearby places to Crawley
Also in Crawley
New build mastic in Crawley: local notes
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.
If you’ve bought a new home near Winchester station, the sealant around baths, showers and frames is worth checking in the first year or two. Around Crawley, as everywhere, new build mastic is only as good as the preparation behind it.
Crawley is about 5 miles north-west of Winchester, in Hampshire. From the centre of Crawley to the outskirts, new build mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Hampshire, we cover 683 places, Crawley among them. We also work in Southampton, around 13 miles away.
Every address in SO21 is within our area for new build mastic, from the main roads to the quietest streets. Close by, we work in Worthy Down (3 miles east), South Wonston (3 miles east), Sutton Scotney (4 miles north-east), Barton Stacey (4 miles north) and Springvale (4 miles east). Further out, we also cover Winchester (5 miles south-east), Eastleigh (10 miles south), Andover (8 miles north-west), Totton (14 miles south), Chandler's Ford (9 miles south) and Hedge End (14 miles south).
Local landmarks in Crawley
We work in homes and buildings around Fox And Hounds Public House and the streets around them. The closest station to Crawley is Winchester station, about 4.5 miles south-east of the centre. A little further out are Winchester Castle (4.8 miles south-east) and Royal Hampshire County Hospital (4.5 miles south-east). Green spaces nearby include Winnall Moors.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
We also work for property managers and facilities teams. Several sites can be quoted together, and we are fully insured for the work.
Different surfaces, different methods
Show homes
Tired or marked sealant in a show home can be renewed. The old bead comes out and a clean new one goes in.
Windows and doors
Internal joints between frames and plaster often crack as a new house dries. We remove cracked sealant and apply a flexible one.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Do not wait for the house to settle if water is getting through
- Look at the sealant regularly in the first couple of years
- Ventilate bathrooms well, especially in the first year
- Record problems with dated pictures
Wipe the sealant with warm soapy water. Avoid abrasive pads and strong solvents, which can damage the surface.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Small faults turn into leaks if left.
When it is not the sealant
To be straight with you, some problems need a different trade:
- Your warranty claim itself, which is between you and the builder
- Movement caused by a poorly fitted tray or bath
- Plumbing faults behind the sealant
If you are not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before you book.
Joints and surfaces we work on
- Bathrooms & en suites
- Kitchens
- Show homes
- Skirting & floors
- Windows & doors
- Plot handovers
The process
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours in a single home. For a village or hamlet like Crawley, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- We apply a sealant that suits each joint and tool it to a neat finish.
- Each area is checked and left with its cure time.
Preparing for the visit
- Keep pets and children clear of the area while we work
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
Ask for a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.
Advice
How we quote for new build mastic
For a quick quote, just ask. What matters most is:
- The product the joint needs
- How many areas need sealing
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and agree the price before starting.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- Whether it has been sealed before
- Photos by email, if that is easy
- Where the property is
- How many joints, rooms or windows are involved
For a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.