Greater London · England
External & façade joints in Farnborough, Greater London
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Farnborough and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps where render, brick and frames meet
- Weeds or debris growing in open joints
- Weathered mastic that no longer stretches
How the visit works
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the job takes anything from a few hours to several days, depending on the building for a typical job. 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.
- 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.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Clear items away from the joints we’re working on
- Keep children and pets away from the work area
Ask for a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we will come back to you with a quote.
Related advice
External mastic in Farnborough
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it, and we do not skip that step. Common call-outs are for rigid filler in a joint that should flex and old sealant gone brittle and cracked, on render & cladding joints, joints between brick and frames and brickwork movement joints.
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.
A 12-month guarantee comes as standard.
- Where
- Farnborough (BR6)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Looking after it afterwards
After the cure time, these simple habits help:
- Walk round the building once a year and look at the joints
- Ask before painting over external sealant
- Keep movement joints as flexible joints, not mortar
- Show decorators and builders where the movement joints are
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established.
FAQs for Farnborough
Is parking a problem for a job in Farnborough?
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.
Can you help a landlord with a rental near Orpington station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover Farnborough?
Yes, we do. Our applicators work in Farnborough, and the service is the same as everywhere else.
How long does external mastic take?
That depends on how much there is to do, but as a guide it takes a few hours to a few days, depending on the length of joint and the access. We’ll tell you when we quote.
What does external mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or send us an email with a short description of the job.
Are you fully insured?
Yes. We are fully insured, and we can confirm the details when we quote.
Do you do commercial work?
Yes. We have worked for hotels, offices and other businesses and we’re fully insured.
Where is Mr Mastic based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
When to call us in Farnborough
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Signs it’s time to call us include:
- Brick movement joints where the sealant has split
- Moss and dirt in joints with no sealant left
- Joints where the bead has come unstuck
- Water getting into walls through failed joints
For an older house near a landmark such as Church of St Giles the Abbot, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Comparing quotes
- What preparation is included
- Is VAT in the price?
- What product goes in the joint
- The length of the guarantee
Landlord and commercial work in Farnborough
We work for landlords and agents as well as homeowners. Resealing between tenancies keeps a property looking cared for.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
What happens if it’s left?
A failed movement joint lets water into the wall, behind render and cladding. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Farnborough.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why choose Mr Mastic in Farnborough
- Over 20 years’ experience
- 4.9 on Google from 180+ five-star reviews
- Homes, businesses and hotels
- Fully insured
Walls and rooflines in Farnborough
Historic houses like Down House (about 2.1 miles south-west) are a reminder that the area around Farnborough 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. London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking.
As a London address, Farnborough can be tricky for parking: let us know about parking bays, permits or a driveway. For site and facilities teams at buildings such as Farnborough Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Farnborough is about 2 miles south-west of Orpington, in Greater London. Jobs in Farnborough get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Farnborough is one of 764 places in Greater London where we work for external mastic. Our London page covers work nearby, about 12 miles away.
Every address in BR6 is covered for external mastic, from the main roads to the quietest streets. External mastic is available to properties on Tye Lane, Peel Road and Pitt Road and the roads around them. If you’re just outside Farnborough, we cover Green Street Green (1 mile south-east), Locksbottom (1 mile north-west), Crofton (1 mile north), Farthing Street (1 mile south-west) and Downe (2 miles south-west). Within a short drive, we also cover London (12 miles north-west), City of Westminster (15 miles north-west), Marylebone (15 miles north-west), Kensington (15 miles north-west), St Pancras (14 miles north-west) and Shoreditch (13 miles north-west).
What’s near Farnborough
Locally, jobs take us to homes and businesses close to Newstead Wood School, South Park and The Buff pub and the streets around them. The nearest railway station is Orpington station, roughly 1.2 miles north-east of the centre. Well-known places in the area include Orpington Hospital (0.9 miles east) and Crofton Roman Villa (1.1 miles north-east). Open spaces near Farnborough include Downe Bank Nature Reserve and Summer Hill.
Places near Farnborough
Also in Farnborough
What affects the quote in Farnborough
Your quote is based on your job. We take into account:
- How much old sealant there is and how hard it is to remove
- The type of sealant required
- How much there is to do
- Any mould that needs treating
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The problem you’ve noticed
- Whether it has been sealed before
- Any access issues, like height or stairs
- A few photos by email, if you can
For external mastic in Farnborough, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.