West Sussex · England
New-build mastic & snagging in Little London, West Sussex
New build mastic for Little London, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracks appearing as a new home settles
- Smeared, uneven beads picked up at snagging
- Gaps between new skirting and floors
How we handle new build mastic in Little London
We carry out plot mastic and second-fix sealing for builders, and snagging reseals for new-home owners. Both get the same care over preparation. We work on skirting & floors, show homes and plot handovers, and the jobs we see most are plot mastic for developers ahead of handover and gaps opening as the house dries out and settles.
Older homes in small places like Little London often have timber floors that move with the seasons, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Location
- Little London (RH17)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
On the day, we look over the joints with you first, so you know exactly what we are doing. We protect the surfaces around the joints before any work starts. Most jobs take anything from a few hours to several days, depending on the number of plots. In a small place like Little London, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely 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.
- We tool every joint neatly and tell you when each area can be used.
Before we arrive
- Keep children and pets away from the work area
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us about any water getting in
Getting a quote
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before we start.
Advice
Can I do it myself?
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.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
FAQs for Little London
Is Little London within the area you cover?
Yes. Little London 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.
I let a flat near Balcombe station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
Where do you work from?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
What new build mastic looks like in Little London
The South East is one of 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 Balcombe station, the sealant around baths, showers and frames is worth checking in the first year or two.
Little London is about 4 miles north of Haywards Heath, in West Sussex. Whether you are in the middle of Little London or further out, we cover new build mastic for every kind of property, from flats and houses to offices and hotels. Our West Sussex coverage runs to 371 places, Little London among them. Our Crawley page covers work nearby (6 miles or so).
Here we cover the RH17 postcode area for new build mastic. If you are just outside Little London, we cover Ardingly (1 mile south), Highbrook (1 mile east), West Hoathly (2 miles north-east), Sharpthorne (2 miles north-east) and Selsfield Common (2 miles north). Larger places within reach include Crawley (6 miles north-west), Horsham (10 miles west), Haywards Heath (4 miles south), Burgess Hill (7 miles south), East Grinstead (6 miles north-east) and Broadfield (6 miles north-west).
What’s near Little London
Around Little London, our work takes us to homes and buildings near The Gardeners Arms and the streets around them. The closest station to Little London is Balcombe station, about 2.3 miles west of the centre. A little further out are Princess Royal Hospital (4.6 miles south) and Waterbury Castle (2.5 miles south-east). The countryside around Little London includes Tilgate Lake and Blunts Wood and Paiges Meadow.
Why it’s worth doing now in Little London
For developers, getting the sealant right first time saves return visits. Snagging visits for failed sealant cost time on every plot. Around Little London, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we will explain what it covers.
Why choose Mr Mastic in Little London
- We leave the area clean and tidy
- Every job guaranteed for a year
- Sanitary silicone with an anti-fungal additive in wet areas
- ARBOMaster approved applicator
Read our cost guide and our reviews.
What affects the quote in Little London
For a quick quote, just ask. What matters most is:
- Mould in or behind the old joints
- How much there is to do
- When we can work, for business premises
- Which sealant suits the joint
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What we need to know
Before you ask for a quote, have a think about:
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
- The address or postcode of the job
Getting a quote is simple: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand.
Different surfaces, different methods
Skirting and floors
Wet-area floor joints need a flexible seal. We seal them with a sealant suited to wet areas.
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.
Signs you need new build mastic in Little London
New homes are full of moisture from plaster, screed and concrete, which takes a year or two to dry out. As it does, timber shrinks and joints open and the sealant has to cope with the movement.
Look out for any of the following:
- Gaps opening as the house dries out and settles
- Beads laid onto grit and dust from the build
- Second-fix sealing on new plots
- Gaps between new skirting and floors
Around Little London, as everywhere, new build mastic is only as good as the preparation behind it.
What your quote should include
- What the cure time is
- Is VAT in the price?
- What product goes in the joint
- Who turns up on the day
Places near Little London
Also in Little London
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Resist patching a failed seal with a tube from the DIY shop
- Open a window or run the fan after bathing
- Act quickly if a seal starts to leak
- Keep water off fresh sealant until it has cured
Keep photos of the joints and any snagging correspondence with your builder. It helps if anything else comes up during the warranty period.
Early snagging is easier snagging. Small faults turn into leaks if left.