Kent · England
External & façade joints in Great Mongeham, Kent
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Great Mongeham. Fully insured, ARBOMaster approved and guaranteed for a year.
- Movement joints with cracked, split or missing sealant
- Hard, crazed mastic that has stopped moving
- Damp patches traced to an open external joint
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Look over the joints every year, ideally after winter
- Check the sealant is paintable before painting near it
- Keep high-pressure jets off the joints
- Act on the first splits you see
Only paint over the joint if we’ve confirmed the sealant can take paint. Many exterior sealants are not designed to be painted and spoil the finish.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
External mastic in Great Mongeham, done properly
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. Typical jobs include sealant pulling away from one side of the joint and rain getting behind render or cladding at a joint, across concrete & block, copings & trims and joints between brick and frames.
External sealant needs dry, clean surfaces, so work around Great Mongeham is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- Great Mongeham (CT14)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes anything from a few hours to several days, depending on the building. Somewhere like Great Mongeham needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Tell us if parking is tricky
- Clear the area around the work
- Mention any tricky access
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Advice
When to call us in Great Mongeham
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.
The problems people normally mention when they call are:
- Joints with sealant missing in places
- Sealant that has lost its bond to the brick or render
- Rain getting behind render or cladding at a joint
- Plants rooting in failed movement joints
For an older house near a landmark such as Church of St Martin, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Questions to ask before you book
- Whether you can choose the colour
- What insurance they hold
- Whether VAT is included
- What happens if they find a problem under the old sealant
What affects the cost of external mastic
There’s no set price list. The quote depends on:
- Whether old sealant or filler has to be cut out
- How many areas need sealing
- The product the joint needs
- The size of the job
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The problem you’ve noticed
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
- A few photos by email, if you can
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you are ready, ring 0345 464 0079 or drop us an email.
FAQs for Great Mongeham
Will you come out to Great Mongeham?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Does living near the coast affect external mastic in Great Mongeham?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are usually the first to need attention.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
Do you take out the old sealant first?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
When will the joints need doing again?
There’s no fixed answer: 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.
Where do you work from?
Mr Mastic is based in Crawley. We cover Great Mongeham and the rest of Kent, along with the rest of our area.
How long does external mastic take?
Typically it takes a few hours for a handful of joints, longer for a whole elevation. Larger jobs naturally take longer.
Surface by surface
Copings and trims
Coping joints that leak let water straight down into the wall. Sealing them early saves the wall below.
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.
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.
If you manage several properties in or around Great Mongeham, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.
DIY sealant or a professional job?
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.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Places near Great Mongeham
Also in Great Mongeham
External mastic in Great Mongeham: local notes
Great Mongeham is within about 3 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. 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.
For landlords with property near Walmer station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. Schools such as Hornbeam Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Great Mongeham is about 1 mile west of Deal, in Kent. Whether you’re in the middle of Great Mongeham or further out, we cover external mastic for every kind of property. Great Mongeham is one of 922 towns and villages in Kent we cover. You can also see our page for Chelmsford, roughly 52 miles from Great Mongeham.
Our applicators cover all of the CT14 postcode area for external mastic and the streets around it. Streets in the area include Church Path, Northbourne Road and Mongeham Road, and we cover them all. Nearby, we also carry out external mastic in Mill Hill (1 mile east), Sholden Meadows (1 mile north-east), Sholden (1 mile north-east), Ripple (1 mile south) and Northbourne (1 mile north-west). We also work in nearby towns such as Canterbury (13 miles west), Margate (12 miles north), Dover (6 miles south-west), Folkestone (12 miles south-west), Ramsgate (9 miles north) and Broadstairs (11 miles north).
Local landmarks in Great Mongeham
Typical jobs here are in homes near Betteshanger Park, Castle Community College and The Mill Inn and the streets around them. For rail, the closest station is Walmer station, roughly 1.2 miles south-east. A little further out are Deal Castle (1.9 miles east) and Kent Museum of the Moving Image (1.8 miles east). For a walk, there’s Monk's Wall nature reserve.