West Sussex · England
Earnley New Build Mastic
New build mastic for Earnley, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Worktop and upstand sealant coming away
- Gaps opening as the house dries out and settles
- Shower seals failing in the first year or two
New build mastic for homes and businesses in Earnley
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 since hurried prep is behind a lot of new-build failures. Common call-outs are for sealant applied over dusty or wet surfaces and second-fix sealing on new plots, on plot handovers, show homes and skirting & floors.
In a village or hamlet like Earnley, new homes are more likely to be a barn conversion or a handful of houses than a big estate. Each still needs its sealant and floor joints finished properly.
All of our work is guaranteed for twelve months.
- Place
- Earnley (PO20)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the cost of new build mastic
Jobs vary more than people expect. The main factors:
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
- The type of sealant required
- Whether there’s mould to deal with
Doing several joints on one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Helping us quote
To help us quote quickly, let us know:
- If someone has resealed it before
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- How we’d reach the joints
If you’re in Earnley and need new build mastic, phone 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Looking after it afterwards
To keep the joints looking good and working properly:
- Keep water off fresh sealant until it has cured
- Raise failed sealant with the developer while you’re covered
- Ventilate bathrooms well, especially in the first year
- Do not wait for the house to settle if water is getting through
Ventilation matters in a new home, which is still drying out. Use the extractor fan or open a window after showers.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Left alone, a small crack can become a leak in a busy bathroom.
How it works
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for most snagging lists, longer for a run of plots. For a village or hamlet like Earnley, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- We make sure the joints are dry and prime them if needed.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
Preparing for the visit
- Move anything stored near the joints
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that is easy.
Advice
FAQs for Earnley
Can you do new build mastic in Earnley?
Yes. Our work covers London and the South East, and Earnley is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
Do you cover smaller places like Earnley?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
What should I tell you?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or drop us an email.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
How long does the job take?
That depends on how much there is to do, but as a guide it takes a few hours for most snagging lists, longer for a run of plots. We will tell you when we quote.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Common problems we fix in Earnley
If plaster or screed was still damp when it was sealed, the bond suffers. Site programmes do not always leave time for joints to dry.
It’s worth asking for a quote if you see:
- Messy sealant that spoils new finishes
- Kitchen sealant that has pulled off the wall
- Joints pulling apart as timber shrinks
- Cracked caulk along new skirting
Around Earnley, as everywhere, new build mastic is only as good as the preparation behind it.
What to look for in a quote
- Which sealant they’ll use, and why
- Who does the work, and how experienced they are
- What preparation is included
- How long to leave it before use
Nearby places to Earnley
More services for Earnley
Leave it or put it right?
A hairline gap at a skirting can wait, but water getting through can’t. If you are unsure which you have, ring 0345 464 0079 or send us an email with pictures and we’ll give you a straight answer. In a small place like Earnley, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, phone 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Earnley
- Colour agreed with you before work begins
- Over 20 years’ experience
- Fully insured
- A 12-month guarantee on all work
How the job changes by surface
Windows and doors
On new builds, external frame sealant can be patchy. We reseal it with a weatherproof, flexible sealant.
Skirting and floors
Floors and skirting move as the house dries and the heating runs. We use a flexible product rather than caulk.
New homes and floors in Earnley
Earnley is close to the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so it’s worth checking at snagging. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For jobs in and around Earnley, choosing the right material for each joint is as important as a tidy finish.
Earnley is about 3 miles north-west of Selsey, in West Sussex. Every kind of property in Earnley can book us for new build mastic, old or new, large or small. Every job comes with our one-year guarantee. We cover 371 towns and villages across West Sussex, large and small. Portsmouth is on our list too, around 11 miles away.
Postcode districts we cover here for new build mastic: PO20. That includes homes and businesses on Earnley Manor Close, Bookers Lane and Drove Lane and the roads around them. We also cover the places around Earnley: East Wittering (1 mile west), Almodington (1 mile north-east), Somerley (1 mile north), Shipton Green (2 miles north) and Birdham (2 miles north). Within a short drive, we also cover Bognor Regis (7 miles east), Chichester (6 miles north-east), Selsey (3 miles south-east), Littlehampton (14 miles east), Emsworth (7 miles north-west) and Rustington (15 miles east).
Around Earnley
Other landmarks nearby include Selsey Lifeboat Museum (3.9 miles south-east). Open spaces near Earnley include Pilsey Island.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.