Surrey · England
External & façade joints in Boundstone, Surrey
External mastic in Boundstone from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Movement joints filled with mortar instead of sealant
- Weeds or debris growing in open joints
- Hard, crazed mastic that has stopped moving
How we handle external mastic in Boundstone
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 have weathered mastic that no longer stretches and movement joints with cracked, split or missing sealant, we can put it right, on copings & trims, concrete & block and render & cladding joints alike.
Homes around Boundstone range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- Boundstone (GU10)
- Wider area
- Surrey
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Quotes for external mastic in Boundstone
For a quick quote, just ask. The main things that affect it are:
- The size of the job
- The number of rooms or windows
- Whether old sealant or filler has to be cut out
- Access and height
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
What to tell us for a quote
What to tell us when you ask for a quote:
- Where the job is, and your postcode
- Any previous sealing or DIY work
- Roughly how big the job is
- Photos by email, if that’s easy
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or drop us an email.
Can I do it myself?
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 fails, we can still redo it.
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.
What we do, step by step
On the day, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. For a job in Boundstone, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- 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.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Mention any leaks or damp you’ve noticed
- Plan for the work area to be out of bounds to pets and children
- Let us know about earlier repairs to the joints
How to get a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Advice
Honest limits
Before you book, it’s worth knowing the limits:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracking across the wall rather than at a joint
- Failed render or damaged cladding panels
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Where we work in Boundstone
- Concrete & block
- Façade panels
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
Boundstone buildings and the weather
With historic houses such as Farnham Castle (about 2 miles north) nearby, there’s older building stock in the area around Boundstone as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near St Timothy, older walls, gutters and the joints where extensions meet them need a flexible sealant. Rented homes near Farnham station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. For site and facilities teams at buildings such as St Peter's CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Boundstone is about 2 miles south-west of Farnham, in Surrey. For external mastic in and around Boundstone, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover Surrey from our Crawley base. Our Surrey coverage runs to 395 places, Boundstone among them. For nearby work, see our Reading page (19 miles or so).
Postcode districts we cover here for external mastic: GU10. That includes homes and businesses on Jubilee Lane, Vine Way and Vine Lane. We also cover the places around Boundstone: Shortheath (1 mile north), Wrecclesham (1 mile north-west), Rowledge (1 mile south-west), Holt Pound (1 mile west) and Batt's Corner (2 miles south-west). Within a short drive, we also cover Guildford (11 miles east), Woking (13 miles north-east), Camberley (11 miles north), Frimley (9 miles north), Haslemere (8 miles south-east) and Cranleigh (15 miles east).
What’s near Boundstone
In Boundstone, that means homes and buildings near Edgeborough School, Weydon School and Underdown nature reserve. For rail, the closest station is Farnham station, roughly 1.7 miles north-east of the centre. Well-known places in the area include Farnham Castle (2 miles north) and Museum of Farnham (1.6 miles north). Open spaces near Boundstone include Culverswell Hill and Farnham Heath.
Landlord and commercial work in Boundstone
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Also near Boundstone
What else we do in Boundstone
FAQs for Boundstone
Do you work for landlords with property near Farnham station?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. You can call 0345 464 0079 or email us with the details for a clear quote.
Can you do external mastic in Boundstone?
Yes. Our work covers London and the South East, and Boundstone is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses.
Can you match the colour of my brickwork?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so it does not stand out.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Do you use backing rod?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
How long does external mastic last?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year and renew it when it starts to fail.
Different surfaces, different methods
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
Aftercare tips
So the new joints stay in good condition:
- Don’t let climbing plants root in the sealant
- Get split or bare joints resealed while the damage is small
- Wash walls gently around the sealant
- Keep movement joints as flexible joints, not mortar
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.