Medway · England
External Mastic in Sharnal Street
External mastic in Sharnal Street from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Damp patches traced to an open external joint
- Weeds or debris growing in open joints
- Joints with sealant missing in places
External mastic in Sharnal Street
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We strip the joint back and start again. If you are dealing with movement joints with cracked, split or missing sealant and sealant pulling away from one side of the joint, we can put it right.
Around Sharnal Street, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water usually gets in.
All our work comes with a 12-month guarantee.
- Location
- Sharnal Street (ME3)
- Region
- Medway
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we cannot put right
It helps to know what we cannot do:
- Damp that isn’t coming from the joint
- Cracked brickwork or render that needs a builder or plasterer
- Adding movement joints to masonry that has none
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Joints between brick and frames
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
- Façade panels
Sharnal Street: your questions answered
Does living near the coast affect external mastic in Sharnal Street?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Will you come out to Sharnal Street?
Yes, Sharnal Street is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Where is Mr Mastic based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Can new sealant go over the old?
No, and we never do. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Can you reach joints on upper floors?
It depends on the building. Where joints can be reached safely, we will do them. Give us some details and we will confirm the access.
Can landlords and businesses book you?
Yes. We work for homeowners, landlords, letting agents, businesses and hotels across Medway.
Can you do several jobs on one visit?
Yes. Just list everything you need.
What is a movement joint?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move and needs a flexible seal, not mortar.
What we do, step by step
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. It usually takes anything from a few hours to several days, depending on the building. Somewhere like Sharnal Street 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Keep children and pets away from the work area
- Mention if the joints have been sealed before
- Move anything stored near the joints
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. When it suits you, call 0345 464 0079 or drop us an email.
Advice
Outside joints around Sharnal Street
Sharnal Street is within about 2 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. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around Church of St Margaret, older walls, gutters and the joints where extensions meet them need a flexible sealant. Rented homes near Gillingham (Kent) station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Sharnal Street is about 5 miles north of Gillingham, in Medway. If you need external mastic in Sharnal Street, please call 0345 464 0079 or email us for a quick quote. We cover Medway from our Crawley base. Our Medway coverage runs to 68 places, and Sharnal Street is one of them. You can also see our page for Chelmsford, about 21 miles away.
We work across the ME3 postcode area for external mastic. Neighbouring places we cover for external mastic include Fenn Street (1 mile north-east), High Halstow (1 mile north-west), Tunbridge Hill (1 mile south-east), Kingsnorth (1 mile south-east) and Hoo St Werburgh (1 mile south-west). Within a short drive, we also cover Gillingham (5 miles south), Chatham (6 miles south), Rochester (5 miles south-west), Rainham (6 miles south), Strood (5 miles south-west) and Luton (5 miles south).
Local landmarks in Sharnal Street
Around Sharnal Street, our work takes us to homes and buildings near The Hundred of Hoo Academy and The Red Dog Public House and the streets around them. For rail, the closest station is Gillingham (Kent) station, roughly 3.9 miles south of the centre. Well-known places in the area include Upnor Castle (3.2 miles south-west) and Medway Maritime Hospital (4.5 miles south). Green spaces nearby include Bishop Saltings.
What the job involves on each surface
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. A primer goes on where the product requires one before sealing.
What affects the cost of external mastic
The price is agreed before any work begins. It takes into account:
- The number of rooms or windows
- Whether the work is at height
- Any working-time requirements on site
- How much there is to do
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we will go through it with you.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- The type of property
- Access, such as stairs, a lift or height
- Photos by email, if that’s easy
- Roughly how big the job is
For a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. We will give you a clear price before any work starts.
What we’re called out for in Sharnal Street
Buildings move more than people expect. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
The problems people generally mention when they call include:
- Joints where the bead has come unstuck
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
- Movement joints with cracked, split or missing sealant
Schools such as High Halstow Primary Academy are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- Which colour the sealant will be
- What guarantee comes with the work
- Whether all the old sealant comes out first
- How much experience the applicator has
Why deal with it now?
A failed movement joint lets water into the wall. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Where a wall is exposed, as many are in small places like Sharnal Street, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We will send you a clear quote for the lot.
Why book with us
- Quality sealants from Arbo and Everbuild
- We never seal over old sealant
- Colour agreed with you before any work starts
- 20+ years of sealant experience
Take a look at our cost guide and our reviews.
Nearby places to Sharnal Street
Other services in Sharnal Street
Landlord and commercial work in Sharnal Street
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.