Kent · England
Grafty Green External Mastic
External mastic for Grafty Green and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Weeds or debris growing in open joints
- Hard, crazed mastic that has stopped moving
- Joints pointed up with cement by mistake
Common problems we fix in Grafty Green
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
The problems people usually mention when they call are:
- Sealant that has lost its bond to the brick or render
- Leaking joints around cladding and façade panels
- Brick movement joints where the sealant has split
- Weathered mastic that no longer stretches
Schools such as Platts Heath Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- Who turns up on the day
- How the surfaces are prepared before sealing
- What the cure time is
- Is VAT in the price?
External mastic in Grafty Green, done properly
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the line blends in. Typical jobs include joints where the bead has come unstuck and gaps where render, brick and frames meet, across joints between brick and frames, brickwork movement joints and concrete & block.
Outside joints can only be sealed when they’re dry, so work in Grafty Green is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Grafty Green (ME17)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
FAQs for Grafty Green
Do you cover Grafty Green for external mastic?
Yes, Grafty Green is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
Is Grafty Green within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
What is backing rod for?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
What should I tell you?
Let us know what needs doing and where. We’ll ask anything else we need to know.
Should I point up the gap in my brickwork?
No, not if it’s a movement joint. Pointing it stops it working, and the wall may crack nearby. A flexible sealant is the right fill.
How long does external mastic take?
As a guide, most jobs take anything from a few hours to several days, depending on the building. Bigger jobs take longer, and we’ll tell you how long to expect.
Do you take out the old sealant first?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and we’ll quote it together.
Places near Grafty Green
Also in Grafty Green
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Wash walls gently around the sealant
- Never let anyone fill a movement joint with mortar
- Show decorators and builders where the movement joints are
- Fix overflowing gutters above sealed joints
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage.
What happens if it’s left?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. In a small place like Grafty Green, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and agree the price before starting.
Why us?
- Old sealant always removed completely
- You choose the colour before work begins
- Neat joints and a tidy finish
- Arbo and Everbuild products
Take a look at our cost guide and what customers say.
How we quote for external mastic
The quote reflects the job in front of us. We take into account:
- How much old sealant there is and how hard it is to remove
- The product the joint needs
- How many areas need sealing
- When we can work, for business premises
Combining jobs into one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Helping us quote
Photos help, but a description is a good start. Please mention:
- Pictures of the joints, sent by email
- The address or postcode of the job
- The type of property
- What the problem is, such as mould, gaps, leaks or cracking
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, and we’ll take it from there.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
How the visit works
There is not much for you to do on the day. Show us the job and we will take it from there. The job generally takes a few hours for a handful of joints, longer for a whole elevation, including the tidy-up. Somewhere like Grafty 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 look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- For business premises, tell us about site rules or sign-in
- Tell us if parking is tricky
Getting a quote
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
Grafty Green buildings and the weather
Historic houses like Leeds Castle (about 3.5 miles north-west) are a reminder that the area around Grafty 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. 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.
For an older house near a landmark such as Church of St Nicholas, older walls, gutters and the joints where extensions meet them need a flexible sealant. If you let a flat or house near Lenham station, split movement joints are easy to miss on a rental until damp shows inside.
Grafty Green is about 8 miles south-east of Maidstone, in Kent. Jobs in Grafty Green get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Grafty Green is one of 922 places in Kent where we work. You can also see our page for Chelmsford, about 37 miles away.
We work across ME17 for external mastic and the streets around it. Streets in the area include Church Road, Woodcock Lane and Headcorn Road, and we cover them all. Other places close to Grafty Green include Liverton Street (1 mile north), Boughton Malherbe (1 mile north-east), Broadstone (1 mile south-west), Eastwood (1 mile west) and Platt's Heath (1 mile north). We also work in nearby towns such as Maidstone (8 miles north-west), Ashford (9 miles south-east), Sittingbourne (10 miles north), Faversham (12 miles north-east), Minster (15 miles north) and Kings Hill (13 miles west).
Near you in Grafty Green
Typical jobs here are in homes near Kiln Wood, The Kings Head Public House and The Lenham School and the streets around them. The closest station to Grafty Green is Lenham station, about 2.1 miles north-east. Nearby you will also find The Dog Collar Museum (3.4 miles north-west) and Coldbridge Castle (1 mile south-east).
Different surfaces, different methods
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. We reseal them with an exterior sealant suited to the material.