Kent · England
Sandhurst Cross External Mastic
Problem with your movement joints in Sandhurst Cross? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Sealant that has lost its bond to the brick or render
- Cracked joints where brick meets render or frames
- Joints pointed up with cement by mistake
What external mastic looks like in Sandhurst Cross
With historic houses such as Great Dixter (about 2.5 miles south-east) nearby, there’s older building stock in the area around Sandhurst Cross as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. 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.
Homes close to Church of St Nicholas include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant. Letting a property close to Robertsbridge station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Sandhurst Cross is about 11 miles north of Hastings, in Kent. Jobs in Sandhurst Cross get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 922 places across Kent, from the larger towns to small villages. You can also see our page for Brighton, roughly 32 miles from Sandhurst Cross.
We cover every part of the TN18 postcode area for external mastic. Local streets include Church Road, Bodiam Road and Bourne Lane. If you’re just outside Sandhurst Cross, we cover Sandhurst (1 mile north-east), Bodiam (1 mile south-west), Little Conghurst (1 mile north-west), Four Throws (1 mile north-west) and Linkhill (2 miles east). Within a short drive, we also cover Royal Tunbridge Wells (15 miles north-west), Paddock Wood (13 miles north-west), Tenterden (7 miles north-east), Park Wood (15 miles north), Staplehurst (10 miles north) and Stanhope (15 miles north-east).
Near you in Sandhurst Cross
Around Sandhurst Cross, our work takes us to homes and buildings near Bodiam Manor School and Old Tavern, among other places. For rail, the closest station is Robertsbridge station, about 4.3 miles south-west of the centre. A little further out are Benenden Hospital (5.4 miles north-east).
External mastic in Sandhurst Cross
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We strip the joint back and start again. We work on concrete & block, façade panels and joints between brick and frames, and the jobs we see most are sealant that has lost its bond to the brick or render and weathered mastic that no longer stretches.
Somewhere as small as Sandhurst Cross, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Every job is covered by our one-year guarantee.
- Place
- Sandhurst Cross (TN18)
- Region
- Kent
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant where it can be done safely.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- The number and length of the joints
- How easy the joints are to reach
- Mould in or behind the old joints
- Which sealant suits the joint
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
- The type of property
- Pictures of the joints, sent by email
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved.
When something else is needed
Before you book, it’s worth knowing the limits too:
- Rising or penetrating damp from elsewhere in the wall
- Subsidence or other structural problems
- Cutting new joints into brickwork, which is building work rather than sealant work
If you are not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
Surfaces we seal
- Copings & trims
- Façade panels
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
How it works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a handful of joints, longer for a whole elevation and we leave things clean and tidy. Somewhere like Sandhurst Cross 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 start by checking each joint, agreeing the ones to redo and how we will reach them.
- Old sealant and any debris are cut and raked out.
- 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.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Tell us about access, such as stairs, a lift or high-level joints
- Keep pets and children clear of the area while we work
Ask for a quote
Asking for a quote is easy: let us know what needs doing and where. Photos by email help us understand the job, and we’ll come back to you with a quote.
Related advice
When to call us in Sandhurst Cross
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
Look out for any of the following:
- Failed seals between different materials
- Failed sealant between panels on a façade
- Water getting into walls through failed joints
- Moss and dirt in joints with no sealant left
Schools such as Sandhurst Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Before booking anyone
- How the joint is cleaned and prepared
- Which sealant they’ll use, and why
- How the colour is chosen
- What insurance they hold
Leave it or put it right?
Running new sealant over the old bead rarely lasts. The new layer cannot bond properly to old, weathered material, so the old joint is cut out fully first. Around Sandhurst Cross, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
What you get with us
- Rated 4.9 stars on Google
- Arbo and Everbuild products
- A choice of colours where the product allows
- Every job guaranteed for a year
Take a look at our cost guide or our reviews.
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Sandhurst Cross: your questions answered
I let a flat near Robertsbridge station. Can you help?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Will you come out to Sandhurst Cross?
Yes, Sandhurst Cross is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used.
When will the joints need doing again?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Our work comes with a 12-month guarantee.
Should I point up the gap in my brickwork?
No. Rigid materials can’t move with the wall. If it has already been filled, we can generally cut it out and reseal it.
Is the work guaranteed?
Yes: twelve months. If anything isn’t right with the work within the year, let us know and we will sort it.
Can you seal over the old sealant?
No, it won’t last. It can look neat for a few weeks, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Can you match the colour of my brickwork?
The aim is a neat, even joint in a colour that suits the wall. We’ll talk through colour options before any work starts.