Kent · England
External & façade joints in Crayford, Kent
Specialist external mastic for Crayford: careful preparation, the right product and tidy work. Call for a quick quote.
- Joints where the bead has come unstuck
- Cracked joints where brick meets render or frames
- Weeds or debris growing in open joints
When it is not the sealant
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Rising or penetrating damp from elsewhere in the wall
- Walls that need new movement joints cut into them
- Render that’s blown, hollow or coming away
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before you book.
Where we work in Crayford
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Copings & trims
- Concrete & block
- Joints between brick and frames
External mastic in Crayford
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We strip the joint back and start again. If you are dealing with movement joints filled with mortar instead of sealant and old sealant gone brittle and cracked, we can help, whatever the surface.
Outbuildings, garages and conservatories around homes in places like Crayford add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
Every job comes with our one-year guarantee.
- Where
- Crayford (DA1, DA5, DA7)
- Region
- Kent
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Crayford
What else we do in Crayford
Your questions about external mastic in Crayford
Do you work for landlords with property near Crayford station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you cover Crayford for external mastic?
Yes. We work across London and the South East, and Crayford is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Do you use backing rod?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
What’s an expansion joint in brickwork?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move and needs a flexible seal, not mortar.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Do you work for hotels and businesses?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Should I try DIY first?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Will the old sealant be removed?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
What affects the quote in Crayford
Call for a quick quote. What matters most is:
- Which sealant suits the joint
- How many areas need sealing
- Whether old sealant or filler has to be cut out
- The amount of work
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
Helping us quote
To make quoting easier, please include:
- Any previous sealing or DIY work
- How many joints, rooms or windows are involved
- Photos by email, if that is easy
- Access, such as stairs, a lift or height
If you are in Crayford and need external mastic, ring 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Why it’s worth doing now in Crayford
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together, and access only has to be arranged once. Homes in smaller places like Crayford can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first and give you a clear quote before any work starts.
Why book with us
- Colour picked to suit the job
- 180+ five-star Google reviews
- Sanitary silicone with an anti-fungal additive in wet areas
- 12-month guarantee on every job
Take a look at how sealant jobs are priced and what customers say.
Walls and rooflines in Crayford
Historic houses like Hall Place and Gardens (about 0.9 miles west) are a reminder that the area around Crayford has older buildings as well as new. 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, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as Wentworth Primary School, its movement joints, gutters and trims need looking after like any other building’s. If you live in an older home near Church of St Paulinus, older walls, gutters and the joints where extensions meet them need a flexible sealant. Letting a property close to Crayford station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Crayford is about 2 miles west of Dartford, in Kent. Whether you are in the middle of Crayford or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 922 places in Kent are on our list, from the larger towns to small villages. We also work in London, about 12 miles from Crayford.
Work in DA1, DA5 and DA7 works the same way as everywhere else we cover. That includes homes and businesses on Swan Lane, Dale Road and Ross Road and the roads around them. Close by, we work in Bowmans (1 mile south), Barnes Cray (1 mile north-east), Barnehurst (1 mile north-west), Coldblow (1 mile south-west) and Wilmington (1 mile south). Larger places within reach include Sevenoaks (12 miles south), Gravesend (9 miles east), Northfleet (7 miles east), Swanley (4 miles south), Swanscombe (5 miles east) and Windmill Hill (8 miles east).
Near you in Crayford
In Crayford, that means homes and buildings near Haberdashers' Aske's Crayford Academy, The Bear and Ragged Staff pub and St Catherine's Catholic School and the streets around them. Crayford has its own railway station: Crayford station. Well-known places in the area include Bexley Museum (0.9 miles west) and West Hill Hospital (1.3 miles east). Open spaces near Crayford include Wansunt Pit.
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Never let anyone fill a movement joint with mortar
- Point out the joints to other trades
- Act on the first splits you see
- Avoid pressure-washing directly into sealant joints
Keep pressure washers away from the sealant. High-pressure water can lift the edges over time.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
DIY versus a professional finish
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
If you are set on DIY, put the effort into 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.
How the visit works
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to several days, depending on the building. A visit to Crayford is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Mention if the joints have been sealed before
- Clear items away from the joints we’re working on
- Tell us about any water getting in
Getting a quote
For a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before we start.
Read more
For landlords and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.