East Sussex · England
Furner's Green External Mastic
External mastic across Furner's Green and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Cracked joints where brick meets render or frames
- Joints where the bead has come unstuck
- Weathered mastic that no longer stretches
FAQs for Furner's Green
Do you cover Furner's Green for external mastic?
Yes, Furner's Green is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will send you a clear quote.
Do you work for landlords with property near Haywards Heath station?
Yes. We work for landlords and letting agents as well as householders, and several properties can be quoted together. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Should I try DIY first?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint before we leave.
How long will you be here?
Typically it takes anything from a few hours to several days, depending on the building. Larger jobs naturally take longer, and we’ll say how long yours will take.
Can you seal joints between two different materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
External mastic for homes and businesses in Furner's Green
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we’ll confirm what access is needed. If you’re dealing with failed sealant between panels on a façade and joints with sealant missing in places, we can help.
External sealant needs dry, clean surfaces, so work around Furner's Green is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
All our work is covered by a 12-month guarantee.
- Location
- Furner's Green (TN22)
- Region
- East Sussex
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Signs you need external mastic in Furner's Green
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Signs it’s time to call us include:
- Weeds or debris growing in open joints
- Cracked joints where brick meets render or frames
- Joints with sealant missing in places
- Old sealant gone brittle and cracked
If you look after a building such as Danehill Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Before you book anyone
- How much experience the applicator has
- How long the guarantee is
- When the joint can take water or movement
- Are they insured?
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Housing providers, facilities teams and property managers book us too in Furner's Green and across East Sussex. We can quote a run of properties together, and we’re fully insured for the work.
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
How we quote for external mastic
Jobs vary more than people expect. What affects the quote:
- Working hours on commercial sites
- The number and length of the joints
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, phone 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Helping us quote
You do not need to know the technical terms. It helps if you can tell us:
- If it’s domestic, commercial or a hotel
- Any access issues, like height or stairs
- Whether it has been sealed before
- Roughly how big the job is
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you’re ready, ring 0345 464 0079 or send us an email.
What external mastic looks like in Furner's Green
Historic houses like Priest House (about 5 miles north-west) are a reminder that the area around Furner's Green has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Haywards Heath station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you live in an older home near The Parish Church of All Saints, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Furner's Green is about 5 miles east of Haywards Heath, in East Sussex. Whether you’re in the middle of Furner's Green or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Our East Sussex coverage runs to 289 places, Furner's Green among them. There’s also a page for Crawley, roughly 11 miles from Furner's Green.
Postcode districts we cover here for external mastic: TN22. If you need external mastic at a property on Tanyard Lane and Slider's Lane or anywhere close by, our applicators can take on the job. Other places close to Furner's Green include Danehill (1 mile north), Chelwood Common (2 miles north), Horsted Keynes (2 miles north-west), Chelwood Gate (2 miles north) and Nutley (2 miles north-east). Within a short drive, we also cover Lewes (10 miles south), Hailsham (15 miles south-east), Crowborough (7 miles east), Uckfield (5 miles south-east), Newhaven (15 miles south) and Peacehaven (15 miles south).
Around Furner's Green
Locally, jobs take us to homes and businesses close to Sheffield Park Garden. The nearest railway station is Haywards Heath station, roughly 5 miles west. Nearby you’ll also find Princess Royal Hospital (4.6 miles west) and Waterbury Castle (2.5 miles north-west). The countryside around Furner's Green includes Brickfield Meadow.
Nearby places to Furner's Green
Other services in Furner's Green
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Clear growth from the base of walls and joints
- Point out the joints to other trades
- Have failed joints looked at early
- Keep movement joints as flexible joints, not mortar
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. In a small place like Furner's Green, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What it costs depends on the size of the job, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Why choose Mr Mastic in Furner's Green
- Fully insured
- Over 20 years’ experience
- A choice of colours where the product allows
- Homes, businesses and hotels
Take a look at how sealant jobs are priced and what customers say.
What we do, step by step
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. Most jobs take anything from a few hours to several days, depending on the building. Somewhere like Furner's Green needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Mention any tricky access
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
Get a quote
For a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.