Greater London · England
External & façade joints in Dagenham Dock, Greater London
Movement joints in Dagenham Dock need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Moss and dirt in joints with no sealant left
- Movement joints with cracked, split or missing sealant
- Cracked joints where brick meets render or frames
Surface by surface
Render joints
Water behind render can lead to blown patches. Resealing the joints early keeps water out.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
External mastic in Dagenham Dock, done properly
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We take the old material out and do it properly. If you are dealing with joints where the bead has come unstuck and joints pointed up with cement by mistake, we can help.
Modern London flats rely on sealed movement joints and cladding joints. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall, and both kinds of building are found across London.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Dagenham Dock (RM9, SE28, IG11)
- Region
- Greater London
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Signs you need external mastic in Dagenham Dock
Some movement joints have been pointed up with mortar by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
These are the problems we are asked about most:
- Weeds or debris growing in open joints
- Gaps where render, brick and frames meet
- Sealant that has lost its bond to the brick or render
- Rain getting behind render or cladding at a joint
If you look after a building such as St Peter's Catholic Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Comparing quotes
- When the joint can take water or movement
- How hidden problems are handled
- Whether they seal over old material or remove it
- How much experience the applicator has
Walls and rooflines in Dagenham Dock
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
Dagenham Dock is in London, so parking needs planning: let us know about parking bays, permits or a driveway. For an older house near a landmark such as St Martin's Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Dagenham Dock is about 2 miles south-west of Dagenham, in Greater London. Whether you are in the middle of Dagenham Dock or further out, we cover external mastic for every kind of property. Our area takes in 764 places across Greater London. Our London page covers work nearby (10 miles or so).
All of RM9, SE28 and IG11 is within our area for external mastic, from the main roads to the quietest streets. Local streets include Perry Road, Choats Road and Chequers Lane. We also cover the places around Dagenham Dock: Dagenham Green (1 mile north-east), Hornchurch Marshes (1 mile east), Thamesmead (1 mile south-west), Beam Park (1 mile east) and Barking Riverside (1 mile west). Within a short drive, we also cover London (10 miles west), City of Westminster (13 miles west), Marylebone (12 miles west), Kensington (15 miles west), St Pancras (11 miles west) and Shoreditch (9 miles west).
Around Dagenham Dock
We work in homes and buildings around Riverside School and Parsloes Park and the streets around them. Dagenham Dock’s nearest station is Dagenham Dock station, about 0.5 miles north of the centre. A little further out are Barking Community Hospital (2.3 miles north-west) and Gallions Reach Shopping Park (2.7 miles west). Open spaces near Dagenham Dock include Scrattons Eco Park.
Honest limits
We will always be straight with you, so here’s what new sealant will not do:
- Failed render or damaged cladding panels
- Rising or penetrating damp from elsewhere in the wall
- Movement that is more than a sealant joint can take
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Joints and surfaces we work on
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Joints between brick and frames
Also near Dagenham Dock
Other services in Dagenham Dock
Why it’s worth doing now in Dagenham Dock
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render around the joint, so the problem grows beyond the joint itself. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Dagenham Dock, the repair is bigger than a sealant job.
Doing several joints on one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear price for the lot.
Why choose Mr Mastic in Dagenham Dock
- Experience in homes, commercial sites and hotels
- A choice of colours where the product allows
- Anti-fungal silicone where joints get wet
- Tidy, careful work
Take a look at our cost guide or our reviews.
Dagenham Dock questions
I let a flat near Dagenham Dock station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Is parking an issue for external mastic in Dagenham Dock?
Parking in Dagenham Dock, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
How long does the job take?
Most jobs take a few hours to a few days, depending on the length of joint and the access, including preparation and clearing up. Your quote will say how long we expect yours to take.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you have insurance?
Yes. Full insurance covers our work.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. There’s a wide choice of exterior colours.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
What we do, step by step
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take anything from a few hours to several days, depending on the building. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Mention if the joints have been sealed before
- Let us know about parking restrictions
- Move anything stored near the joints
Getting a quote
If you’re in Dagenham Dock and need external mastic, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
How to look after the new joints
So the new joints stay in good condition:
- Look over the joints every year, ideally after winter
- Keep movement joints as flexible joints, not mortar
- Keep water from gutters off the wall
- Get split or bare joints resealed while the damage is small
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Act while the splits are small. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
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.