Kent · England
External Mastic in Alkham
External mastic in Alkham from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Water getting into walls through failed joints
- Movement joints with cracked, split or missing sealant
- Hard, crazed mastic that has stopped moving
External mastic in Alkham: local notes
Alkham is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near Church of St Anthony the Martyr, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Letting a property close to Kearsney station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Alkham is about 3 miles west of Dover, in Kent. From the centre of Alkham to the outskirts, external mastic is available for homes and businesses alike. Across Kent, we cover 922 places, and Alkham is one of them. Chelmsford is on our list too, about 52 miles from Alkham.
Jobs for external mastic in CT15 works the same way as everywhere else we cover. Local streets include Alkham Valley Road, Hogbrook Hill Lane and Newlyn's Meadow. We also cover the places around Alkham: South Alkham (1 mile south-west), Chalksole Green (1 mile north-west), Ewell Minnis (1 mile north), Wolverton (1 mile north-east) and Drellingore (1 mile south-west). Larger places within reach include Ashford (15 miles west), Canterbury (12 miles north-west), Dover (3 miles east), Folkestone (4 miles south-west), Deal (9 miles north-east) and Hythe (8 miles south-west).
What’s near Alkham
Typical jobs here are in homes near Sladden Wood, among other places. The closest station to Alkham is Kearsney station, roughly 2.3 miles north-east of the centre. A little further out are Folkestone Castle (3.7 miles south-west) and Crabble Corn Mill (2.6 miles east). Open spaces near Alkham include Dover Western Heights and Sugar Loaf Hill.
External mastic for homes and businesses in Alkham
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a matching colour. If you are dealing with joints where the bead has come unstuck and hard, crazed mastic that has stopped moving, we can put it right, on copings & trims, brickwork movement joints and joints between brick and frames alike.
Somewhere as small as Alkham, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Alkham (CT15)
- Region
- Kent
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Keeping the joints in good condition
Aftercare is simple:
- Clear growth from the base of walls and joints
- Act on the first splits you see
- Check external joints each spring
- Wash walls gently around the sealant
Do not paint over the new sealant unless we’ve said the product is paintable. Many exterior sealants aren’t designed to be painted.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick.
What affects the cost of external mastic
There’s no set price list. The quote depends on:
- How many rooms, windows or areas are involved
- The old material and how stubborn it is
- The type of sealant required
- Whether there’s mould to deal with
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
What to tell us for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Access, such as stairs, a lift or height
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
For external mastic in Alkham, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before any work starts.
Questions from Alkham
Do you work for landlords with property near Kearsney station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Do you cover smaller places like Alkham?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you reach joints on upper floors?
Each building is different. Tell us the height, the number of joints and what’s below them and we will confirm how they can be reached safely.
What does external mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we will talk you through it.
How long does external mastic last?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges, and reseal at that point.
What is backing rod for?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
Where do you work from?
Our base is in Crawley, and we work across South East England, London and Scotland.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we’re using and why.
Nearby places to Alkham
What else we do in Alkham
What we cannot put right
We will not take on work that won’t last, so here’s what sealant cannot put right:
- Structural movement, which needs a surveyor or engineer
- Damp that isn’t coming from the joint
- Render that is blown, hollow or coming away
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
What we seal
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Façade panels
- Joints between brick and frames
- Copings & trims
What the job involves on each surface
Cladding and façade panels
If the façade has a specified sealant, that’s what we use. Tell us what the building has when you get in touch.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that’s happened, we rake it out and reseal it properly where it can be done safely.
The process
At the end, we look at the finished work together and explain the cure time. The visit itself usually takes anything from a few hours to several days, depending on the building, depending on how much there is to do. In a small place like Alkham, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Mention any parking rules near the property
- Clear items away from the joints we are working on
- Let us know about stairs, lifts or work at height
Get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work before giving you a price.
Related advice
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
We also work for property managers and facilities teams. Several sites can be quoted together, and we’re fully insured.