Kent · England
Bowmans External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for householders, landlords and businesses in Bowmans. Fully insured, ARBOMaster approved and guaranteed for a year.
- Joints where the bead has come unstuck
- Hard, crazed mastic that has stopped moving
- Panel joints letting water in
External mastic for homes and businesses in Bowmans
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall so the joint does not stand out. If you’re dealing with failed sealant between panels on a façade and water getting into walls through failed joints, we can help.
In a smaller place like Bowmans, some homes face open ground, so exposed walls and rooflines take more wind-driven rain. Joints on those sides are normally the first to go.
We stand behind the work with a 12-month guarantee.
- Location
- Bowmans (DA1, DA2, DA5)
- Region
- Kent
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
So the new joints stay in good condition:
- Make sure movement joints aren’t pointed over
- Wash walls gently around the sealant
- Do not let climbing plants root in the sealant
- Fix overflowing gutters above sealed joints
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
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 it’s worth resealing at the first signs.
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
For anyone letting property in or around Bowmans, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Walls and rooflines in Bowmans
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Hall Place and Gardens (about 1.1 miles north-west) are a reminder that the area around Bowmans has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
In the older streets around St Barnabas, the joints between older walls, newer extensions and the roofline need a sealant that can move. For landlords with property near Crayford station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Bowmans is about 2 miles west of Dartford, in Kent. Jobs in Bowmans get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Bowmans is one of 922 places in Kent we cover for external mastic. We also work in London, around 13 miles away.
Work in DA1, DA2 and DA5 works the same way as everywhere else we cover. That includes homes and businesses on Swan Lane, Dale Road and Ross Road. You will find Bowmans on the A2018, so it’s easy for us to get to. Other places close to Bowmans include Wilmington (1 mile south), Crayford (1 mile north), Coldblow (1 mile west), Joyden's Wood (1 mile south-west) and Barnes Cray (1 mile north-east). Further out, we also cover Sevenoaks (11 miles south), Gravesend (9 miles east), Northfleet (7 miles east), Swanley (3 miles south), Kings Hill (15 miles south-east) and Swanscombe (5 miles east).
Around Bowmans
In Bowmans, that means homes and buildings near Wilmington Grammar School for Girls, Bird in Hand pub and St Columba's Catholic Boys' School. The closest station to Bowmans is Crayford station, about 0.6 miles north. Well-known places in the area include Stone Castle (4.1 miles east) and West Hill Hospital (1.3 miles east). Not far away are Wansunt Pit.
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render near the open joint, so the problem grows beyond the joint itself. In an older home around Bowmans, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Combining jobs into one visit usually 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.
Why Bowmans clients choose us
- Homes, businesses and hotels
- We’re fully insured
- 12-month guarantee on every job
- 180+ five-star Google reviews
Take a look at how sealant jobs are priced or customer reviews.
Bowmans questions
Can you help a landlord with a rental near Crayford station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Is Bowmans in your area for external mastic?
Yes, Bowmans is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing, and we will send you a clear quote.
How long will you be here?
A typical job takes a few hours to a few days, depending on the length of joint and the access, including the preparation. We will confirm how long when we quote.
Is there a guarantee?
Yes, for a year. If there’s a problem with our work in that time, tell us and we will put it right.
Does someone need to be in?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
How do I get a quote for external mastic in Bowmans?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Are you insured?
Yes. We’re fully insured for domestic and commercial work.
What affects the cost of external mastic
Call for a quick quote. The main things that affect it are:
- How much old sealant there is and how hard it is to remove
- The number of rooms or windows
- Any working-time requirements on site
- How easy the joints are to reach
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Asking for a quote
Before you ask for a quote, have a think about:
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- Any previous sealing or DIY work
- The problem you’ve noticed
We don’t publish a price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or email us.
Also near Bowmans
Other services in Bowmans
Common problems we fix in Bowmans
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
People generally contact us after spotting something like this:
- Gaps where render, brick and frames meet
- Leaking joints around cladding and façade panels
- Hard, crazed mastic that has stopped moving
- Joints with sealant missing in places
Schools such as Wentworth Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- How the joint is cleaned and prepared
- What product goes in the joint
- Whether you can choose the colour
- What insurance they hold
The process
Before we leave, we go over the finished joints with you. The visit itself generally takes a few hours for a handful of joints, longer for a whole elevation, depending on the amount of work. In a smaller place like Bowmans, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We start by walking round the building and agreeing the joints and the access.
- 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
- Move anything stored near the joints
Ask for a quote
If you’re in Bowmans and need external mastic, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Advice
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We cut it out and start again.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.