West Sussex · England
New Build Mastic in Furnace Green
New build mastic across Furnace Green and nearby, with old sealant always removed completely and a one-year guarantee.
- Worktop and upstand sealant coming away
- Internal frame sealant that has split
- Gaps opening as the house dries out and settles
About our new build mastic in Furnace Green
We never seal over a failed new-build bead. Fresh silicone cannot bond to the old layer, so the joint is cut out, cleaned, dried and resealed. If you are dealing with internal frame sealant that has split and new-build shower sealant that has already split, we can help, on windows & doors, plot handovers and skirting & floors alike.
In smaller places like Furnace Green, new homes tend to come as small developments or single plots. Each still needs its sealant and floor joints finished properly from day one.
You are covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or drop us an email.
- Location
- Furnace Green (RH10)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Quotes for new build mastic in Furnace Green
Your quote is based on your job. We look at:
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
- How many areas need sealing
The cost depends on the amount of work, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts.
What to tell us for a quote
What to tell us when you ask for a quote:
- Roughly how big the job is
- The type of property
- Photos by email, if that is easy
- The problem you’ve noticed
Every job is quoted individually. Just call 0345 464 0079 or email us with the details.
New build mastic around Furnace Green
Crawley, which Furnace Green is part of, is one of England’s post-war new towns. Crawley has kept growing, with newer neighbourhoods added to the original town, so brand-new homes and homes from the post-war decades sit within a short drive of each other. Newer homes need snagging; older ones need their joints renewing. Rainfall in the South East is lower than in much 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 Three Bridges station, the sealant around baths, showers and frames is worth checking in the first year or two.
Furnace Green is about 2 miles south-east of Crawley, in West Sussex. Every kind of property in Furnace Green can book us for new build mastic. Every job comes with our one-year guarantee. Furnace Green is one of 371 places in West Sussex where we work.
Here we cover the RH10 postcode area for new build mastic. New build mastic is available to properties on Marion Road, Holder Road and Bolton Road and the roads around them. We also cover the places around Furnace Green: Pease Pottage (2 miles south-west), Worth Abbey (2 miles east), Balcombe Lane (2 miles south-east), Balcombe (3 miles south-east) and Staplefield (4 miles south). Further out, we also cover Horsham (7 miles west), Haywards Heath (7 miles south), Burgess Hill (10 miles south), East Grinstead (7 miles east), Billingshurst (14 miles south-west) and Bewbush (3 miles west).
Around Furnace Green
Locally, jobs take us to homes and businesses close to Oriel High School, The Charcoal Burner pub and Tilgate Park. For rail, the closest station is Three Bridges station, roughly 1.2 miles north. A little further out are Crawley Museum (1.8 miles north-west) and Crawley Hospital (2 miles north-west). Not far away are Tilgate Lake.
When something else is needed
It helps to know what we can’t do too:
- Cracked trays, tiles or worktops
- Deciding who is responsible under a builder’s warranty
- Movement caused by a poorly fitted tray or bath
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Show homes
- Windows & doors
- Kitchens
- Bathrooms & en suites
- Skirting & floors
- Plot handovers
Leave it or put it right?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it will not bond to the old layer. A lasting seal starts with removing the old one completely. Around Furnace Green, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
Why choose Mr Mastic in Furnace Green
- You choose the colour before work begins
- Old sealant always removed completely
- Anti-fungal silicone where joints get wet
- Full insurance on every job
Read what affects the cost or what customers say.
Your questions about new build mastic in Furnace Green
Is Furnace Green within the area you cover?
Yes. Furnace Green is within the area we cover, which takes in towns, villages and rural addresses. We work across 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 Three Bridges station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Can you do plot mastic on a new development?
Yes. Second-fix sealing in bathrooms, kitchens, frames and floors is part of what we do. We clean and prime joints properly to keep callbacks down.
How much does new build mastic cost in Furnace Green?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Will there be a smell?
Sometimes, a little. Any smell clears as the sealant cures.
Can new sealant go on top of the old bead?
No. Sealing over old sealant looks fine for a few weeks, then lifts. We remove every bit of the old bead before resealing.
How long does new build mastic take?
Typically it takes a few hours in a single home. Bigger jobs take longer, and we’ll say how long yours will take.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
What we do, step by step
There is not much for you to do on the day. Show us the job and we will take it from there. The work itself takes a few hours for most snagging lists, longer for a run of plots from start to finish. For a job in Furnace Green, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- 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.
- We tool every joint neatly and tell you when each area can be used.
How to prepare
- Tell us about any water getting in
- Mention if the joints have been sealed before
- Keep children and pets away from the work area
Getting a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved.
Related advice
Do you need new build mastic in Furnace Green?
The first winter with the heating on dries a new home quickly. Skirting, frames and worktops pull away slightly and cracks appear in the sealant.
Signs it’s time to call us include:
- Gaps between new skirting and floors
- Gaps opening as the house dries out and settles
- Kitchen sealant that has pulled off the wall
- Sealant applied over dusty or wet surfaces
Around Furnace Green, as everywhere, new build mastic is only as good as the preparation behind it.
Before you book anyone
- Whether VAT is included
- How much experience the applicator has
- What product goes in the joint
- What guarantee comes with the work
Nearby places to Furnace Green
Other services in Furnace Green
What the job involves on each surface
Kitchens
Worktops in new homes can move slightly as the house dries, which opens gaps along the back. A fresh flexible bead closes them.
Plot handovers
Developers can send the plot schedule and specification and we will quote. We seal bathrooms, kitchens, frames and floors to the agreed spec.
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.