Kent · England
Ide Hill External Mastic
Problem with your movement joints in Ide Hill? We cut out the old, prepare the joints and apply the right sealant.
- Failed seals between different materials
- Moss and dirt in joints with no sealant left
- Failed sealant between panels on a façade
How we handle external mastic in Ide Hill
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We take the old material out and do it properly. If you have joints pointed up with cement by mistake and sealant pulling away from one side of the joint, we can help.
Somewhere as small as Ide Hill, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
A 12-month guarantee comes as standard, so you are covered after we’ve gone.
- Place
- Ide Hill (TN14)
- Wider area
- Kent
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlord and commercial work in Ide Hill
For anyone letting property in or around Ide Hill, several properties can go on one quote. Send us the addresses and the work at each.
We also work for property managers and facilities teams. Several sites can be quoted together, and we’re fully insured.
External mastic in Ide Hill: local notes
With historic houses such as Chartwell (about 2.1 miles west) nearby, there’s older building stock in the area around Ide Hill as well as newer homes. 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Sevenoaks station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you look after a building such as Ide Hill Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Ide Hill is about 3 miles south-west of Sevenoaks, in Kent. We provide external mastic to homes and businesses in Ide Hill. Ide Hill is one of 922 places in Kent where we work for external mastic. You can also see our page for Crawley, roughly 17 miles from Ide Hill.
Jobs for external mastic in TN14 is quoted and booked the same way as anywhere else. If you need external mastic at a property on Hanging Bank and Camberwell Lane or a nearby road, we can help. With the B2042 close by, Ide Hill is easy for our applicators to reach. Neighbouring places we cover for external mastic include Goathurst Common (1 mile north-east), Toy's Hill (1 mile west), Brasted Chart (2 miles north-west), Sundridge (2 miles north) and Brasted (2 miles north-west). We also work in nearby towns such as Dartford (14 miles north), Sevenoaks (3 miles north-east), Royal Tunbridge Wells (10 miles south-east), Tonbridge (7 miles south-east), Swanley (11 miles north) and Kings Hill (12 miles east).
Local landmarks in Ide Hill
In Ide Hill, that means homes and buildings near Stubbs Wood Country Park and The Cock Inn and the streets around them. Ide Hill’s nearest station is Sevenoaks station, roughly 3.1 miles north-east. Other landmarks nearby include Sevenoaks Museum (3.3 miles north-east) and Sevenoaks Hospital (4.1 miles north-east). Not far away are Dryhill Nature Reserve and Betsom's Hill.
Quotes for external mastic in Ide Hill
Some jobs are bigger than they look, and some smaller. The main factors:
- Which sealant suits the joint
- Access and height
- How much old sealant there is and how hard it is to remove
- Any working-time requirements on site
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Helping us quote
You do not need to know the technical terms. Just tell us:
- Photos by email, if that is easy
- Any access issues, like height or stairs
- Any previous sealing or DIY work
- The rough size of the job
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
When to call us in Ide Hill
If plants are growing out of a joint, the sealant has generally failed or was never there. Roots and dirt hold water against the wall and speed up the damage.
Signs it’s time to call us include:
- Movement joints with cracked, split or missing sealant
- Rigid filler in a joint that should flex
- Cracked joints where brick meets render or frames
- Leaking joints around cladding and façade panels
For an older house near a landmark such as Church of St Mary at South End of Village Green, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Questions to ask before you book
- How hidden problems are handled
- How the joint is cleaned and prepared
- Which sealant they’ll use, and why
- What insurance they hold
Places near Ide Hill
Also in Ide Hill
Surface by surface
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best year round.
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. We choose the product to suit.
Ide Hill: your questions answered
I let a flat near Sevenoaks station. Can you help?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Is Ide Hill in your area for external mastic?
Yes. We work across London and the South East, and Ide Hill is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we will give you a clear price.
Why is there a gap in my brick wall?
A vertical gap in a long brick wall is usually a movement joint. It lets the bricks expand without cracking, and it should be sealed with a flexible sealant.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can you reach joints on upper floors?
It depends on the height and the site. Ground-floor joints are simple; for higher work, tell us about the building and we’ll confirm what’s needed.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
How long does external mastic last?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Our work comes with a one-year guarantee.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
What we do, step by step
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it usually takes anything from a few hours to several days, depending on the building. Somewhere as small as Ide Hill, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Try not to wet indoor joints just before the visit
- Mention any parking rules near the property
How to get a quote
For external mastic in Ide Hill, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before we start.
Related advice
Why deal with it now?
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. Older cottages and farmhouses around Ide Hill can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Ask us for a quote and we will go through it with you.
Why Ide Hill clients choose us
- Any old sealant cut out fully, not covered over
- More than 20 years in sealant work
- Trusted Arbo and Everbuild sealants
- Tidy, careful work
See our cost guide and our reviews.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.