West Sussex · England
New Build Mastic in Rackham
New build mastic across Rackham and nearby, with old sealant always removed completely and a 12-month guarantee.
- Gaps behind new kitchen upstands
- Messy sealant that spoils new finishes
- Skirting joints opening in the first winter
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
How we handle new build mastic in Rackham
Our new-build work comes in two parts: plot mastic for developers, and putting right failed sealant for people who’ve bought a new home. In both, preparation makes the difference since hurried prep is behind a lot of new-build failures. Common call-outs are for skirting joints opening in the first winter and messy sealant that spoils new finishes, across windows & doors, bathrooms & en suites and skirting & floors.
Somewhere as small as Rackham, new homes tend to be conversions, self-builds or a few houses rather than an estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Rackham (RH20)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. We reseal it with a weatherproof, flexible sealant.
Plot handovers
Developers can send the plot schedule and specification and we’ll quote. Sealant work across the plot is covered.
What happens if it’s left?
The builder is normally the first port of call while the snagging or warranty period runs. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. Older cottages and farmhouses around Rackham can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Why Rackham customers choose us
- Fully insured
- Over 20 years’ experience
- Sealant colour chosen to suit
- Colour agreed with you before we start
Take a look at what affects the cost or what customers say.
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Follow the cure time we give you
- Keep photos and emails about snagging items
- Avoid running a DIY bead over the old one
- Use the extractor fan every time you shower
Watch the joints as the house settles. Small gaps can appear as the house dries.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black saves a harder job later.
How the visit works
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. It normally takes a few hours for most snagging lists, longer for a run of plots. In a small place like Rackham, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out 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.
- Each bead is tooled and the cure times explained.
How to prepare
- On commercial sites, let us know about site rules
- Let us know about earlier repairs to the joints
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
Related advice
Places near Rackham
Other services in Rackham
FAQs for Rackham
Can you do new build mastic in Rackham?
Yes, Rackham is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
Do you cover smaller places like Rackham?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is it normal for sealant to crack in a new home?
New homes dry out and move in their first couple of years, and sealant is often rushed onto dusty, unprimed surfaces. Both lead to early failure.
Can landlords and businesses book you?
Yes. We work in homes, commercial premises and hotels, and we’re fully insured.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
How long does new build mastic take?
Typically it takes anything from a few hours to several days, depending on the number of plots. Bigger jobs take longer, and we will tell you how long to expect.
Is there any odour?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
Will you just run a new bead over the existing one?
No. Over-sealing traps mould and water and soon fails. We remove every bit of the old bead before resealing.
What new build mastic looks like in Rackham
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around Rackham, as everywhere, new build mastic is only as good as the preparation behind it.
Rackham is about 7 miles north of Littlehampton, in West Sussex. For new build mastic in and around Rackham, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We’re based in Crawley and cover West Sussex. 371 places in West Sussex are on our list, large and small. For nearby work, see our Brighton page (17 miles or so).
All of RH20 is within our area for new build mastic. If you are just outside Rackham, we cover Cross Gate (1 mile west), Amberley (1 mile west), Coldwaltham (2 miles north-west), Bury (2 miles west) and Hardham (3 miles north). Larger places within reach include Horsham (13 miles north-east), Worthing (8 miles south-east), Bognor Regis (12 miles south-west), Chichester (13 miles south-west), Littlehampton (7 miles south) and Shoreham-by-Sea (12 miles south-east).
Local landmarks in Rackham
In Rackham, that means homes and buildings near Parham Park, among other places. The nearest railway station is Amberley station, roughly 1.9 miles south-west. Other landmarks nearby include Arundel and District Hospital (4.8 miles south-west) and Amberley Museum (1.8 miles south-west). Green spaces nearby include Bignor Hill and Amberley Wildbrooks RSPB Reserve.
Common problems we fix in Rackham
The wrong product is sometimes used in the wrong place: decorators’ caulk in a wet area, or a stiff sealant where there’s movement. Both fail early.
It’s worth asking for a quote if you see:
- Messy sealant that spoils new finishes
- Gaps between new skirting and floors
- Sealant work across a run of new homes
- Sealant that never bonded to the surface
If you’ve bought a new home near Amberley station, the sealant around baths, showers and frames is worth checking in the first year or two.
Before you book anyone
- Are they insured?
- How the surfaces are prepared before sealing
- Which sealant they’ll use, and why
- Is VAT in the price?
Quotes for new build mastic in Rackham
The quote reflects the job in front of us. We look at:
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
- Any working-time requirements on site
- How easy the joints are to reach
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- Any previous sealing or DIY work
- Where the job is, and your postcode
- The rough size of the job
- How we’d reach the joints
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you’re ready, ring 0345 464 0079 or send us an email.