Slough · England
External & façade joints in Farnham Royal, Slough
We cover Farnham Royal for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Joints with sealant missing in places
- Old sealant gone brittle and cracked
- Movement joints filled with mortar instead of sealant
External mastic for homes and businesses in Farnham Royal
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two. We work on concrete & block, copings & trims and façade panels, and people most often call us about weeds or debris growing in open joints and leaking joints around cladding and façade panels.
External sealant needs dry, clean surfaces, so work around Farnham Royal is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
You get a 12-month guarantee, the same in Farnham Royal as everywhere else we work.
- Where
- Farnham Royal (SL2)
- Wider area
- Slough
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Landlords, agents and businesses in Farnham Royal
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. Around Farnham Royal, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
What you get with us
- Full insurance on every job
- We never seal over old sealant
- We leave the area clean and tidy
- Colour agreed with you before work begins
How the job changes by surface
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and helps it last.
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.
Common problems we fix in Farnham Royal
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
People generally contact us when they notice something like this:
- Rigid filler in a joint that should flex
- Cracked joints where brick meets render or frames
- Leaking joints around cladding and façade panels
- Moss and dirt in joints with no sealant left
In the older streets around Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain.
What to look for in a quote
- Whether all the old sealant comes out first
- How the surfaces are prepared before sealing
- The length of the guarantee
- Whether you can choose the colour
Common questions in Farnham Royal
Do you cover smaller places like Farnham Royal?
Yes. Farnham Royal is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Farnham Royal for external mastic?
Yes. Our work covers London and the South East, and Farnham Royal is part of that. You can phone 0345 464 0079 or email us and tell us what needs doing.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Are you fully insured?
Yes. Mr Mastic is fully insured.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply ring 0345 464 0079 or email us.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
DIY versus a professional finish
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.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What external mastic looks like in Farnham Royal
With historic houses such as Cliveden (about 3.3 miles west) nearby, there’s older building stock in the area around Farnham Royal as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Schools such as St Mary's Farnham Royal CofE Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. If you let a flat or house near Burnham station, split movement joints are easy to miss on a rental until damp shows inside.
Farnham Royal is about 2 miles north of Slough, in Slough. Anywhere in SL2, our applicators can take on external mastic. Our Slough coverage runs to 31 places, Farnham Royal among them. You can also see our page for Reading, about 17 miles away.
Jobs for external mastic in SL2 works the same way as everywhere else we cover. Local streets include Church Road, Sospel Court and Montague Close, all of which we cover. We also cover Britwell (1 mile south-west), East Burnham (1 mile north-west), Farnham Common (1 mile north), Egypt (1 mile north) and Slough (2 miles south). We also work in nearby towns such as Langley (4 miles south-east), Upton (3 miles south-east), Datchet (4 miles south-east), Ditton (4 miles south-east), Poyle (6 miles south-east) and Colnbrook (6 miles south-east).
What’s near Farnham Royal
Locally, jobs take us to homes and businesses close to The Crown Public House, Cocksherd Wood and Caldicott School and the streets around them. The closest station to Farnham Royal is Burnham station, about 1.8 miles south-west of the centre. A little further out are Wexham Park Hospital (1.8 miles east) and Windsor Castle (4 miles south). Not far away are Burnham Beeches and Taplow Lake.
How the visit works
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The work itself takes a few hours to a few days, depending on the length of joint and the access from start to finish. Somewhere like Farnham Royal needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Tell us about any water getting in
- Clear items away from the joints we’re working on
- On commercial sites, let us know about site rules
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, ring 0345 464 0079 or drop us an email.
Advice
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Never let anyone fill a movement joint with mortar
- Check the sealant is paintable before painting near it
- Act on the first splits you see
- Keep soil, plants and ivy away from the joints
Don’t let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
Act while the splits are small. At that stage it’s a simple cut out and reseal before water has had years to get in.