Greater London · England
External Mastic in St George in the East
Specialist external mastic for St George in the East: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Joints pointed up with cement by mistake
- Failed seals between different materials
- Movement joints with cracked, split or missing sealant
How the visit works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours to a few days, depending on the length of joint and the access. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in St George in the East. It helps if you can point us to a visitor permit or a bay close to the door.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Mention any parking rules near the property
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
Get a quote
We quote each job on its own. Just ring 0345 464 0079 or email us with the details and send photos if you have them.
Advice
External mastic for homes and businesses in St George in the East
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we’ll confirm what access is needed. If you have leaking joints around cladding and façade panels and sealant that has lost its bond to the brick or render, we can help.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so a leaking gutter joint or failed wall joint can affect more than one home. For a flat in St George in the East, check the lease for who looks after the outside.
Whatever the size of the job, you get the same 12-month guarantee.
- Where
- St George in the East (E1, E1W, SE16)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Also near St George in the East
Other services in St George in the East
How the job changes by surface
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so its sealant has to stay flexible.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two so neither cracks the other.
How we quote for external mastic
We quote each job individually. These are the things that affect it:
- The number and length of the joints
- Which sealant suits the joint
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, phone 0345 464 0079 or send us an email and we will give you an honest view and a quote.
What to tell us for a quote
Before you ask for a quote, have a think about:
- The type of property
- The rough size of the job
- If someone has resealed it before
- Photos by email, if that is easy
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we’ll take it from there.
What external mastic looks like in St George in the East
With historic houses such as Mansion House (about 1.2 miles west) nearby, there’s older building stock in the area around St George in the East as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts.
As a London address, St George in the East can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. For site and facilities teams at buildings such as St Paul's Whitechapel Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s.
St George in the East is about 1 mile south-east of Whitechapel, in Greater London. We carry out external mastic for householders, landlords and businesses in St George in the East and nearby, as part of our work across Greater London. St George in the East is one of 764 towns and villages in Greater London where we work for external mastic.
Every address in E1, E1W and SE16 is within our area for external mastic. We cover properties on Glamis Road, Redmead Lane and Wapping Lane. St George in the East sits on or near the A1210 and A1211. Neighbouring places we cover for external mastic include Wapping (1 mile south-east), East End of London (1 mile north-east), Whitechapel (1 mile north-west), Tower Hill (1 mile west) and Shadwell (1 mile east). We also work in nearby towns such as City of Westminster (4 miles west), Marylebone (4 miles west), Kensington (6 miles west), St Pancras (3 miles north-west), Walthamstow (6 miles north) and Hampstead (6 miles north-west).
Near you in St George in the East
Typical jobs here are in homes near St Mellitus College, Mulberry School for Girls and Bishopsgate Institute Special Collections and Archives, among other places. Nearby too are Town of Ramsgate pub (less than half a mile south), William Curtis Ecological Park (0.7 miles west) and St Mary-at-Hill (0.9 miles west). St George in the East has its own railway station: Shadwell station. Other landmarks nearby include Jack the Ripper Museum (within half a mile north-west) and The Royal London Hospital (0.7 miles north). Not far away are St. James's Park Lake and Tower Hill.
Questions from St George in the East
Is parking a problem for a job in St George in the East?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
I let a flat near Shadwell station. Can you help?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear quote.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
How much does external mastic cost in St George in the East?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
Is the work guaranteed?
Yes, always. There’s a 12-month guarantee on every job.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
How long does external mastic last?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges and have them redone then.
Will there be a smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
Do you need external mastic in St George in the East?
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
People generally contact us when they notice one of these:
- Gaps where render, brick and frames meet
- Weeds or debris growing in open joints
- Weathered mastic that no longer stretches
- Panel joints letting water in
Letting a property close to Shadwell station? Then split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- Which sealant they’ll use, and why
- How the surfaces are prepared before sealing
- Who does the work, and how experienced they are
- How long the guarantee is
Why it’s worth doing now in St George in the East
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. In a flat in St George in the East, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
Why book with us
- More than 20 years in sealant work
- Old sealant always removed completely
- Approved under the ARBOMaster scheme
- Arbo and Everbuild products
See our cost guide or our reviews.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
When it is not the sealant
We will always be straight with you, so here’s what new sealant will not do:
- Movement that’s more than a sealant joint can take
- Damp that is not coming from the joint
- Walls that need new movement joints cut into them
If you’re not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
What we seal
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
- Copings & trims
- Façade panels
- Render & cladding joints