Surrey · England
Old Dean External Mastic
We cover Old Dean 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
- Damp patches traced to an open external joint
- Moss and dirt in joints with no sealant left
External mastic in Old Dean
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement. We work on concrete & block, brickwork movement joints and joints between brick and frames, and common reasons people get in touch are failed seals between different materials and plants rooting in failed movement joints.
In and around Old Dean, older properties sit alongside newer ones, each with its own outside joints. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
A 12-month guarantee comes as standard, so you’re covered after we have gone.
- Where
- Old Dean (GU15, GU19)
- Wider area
- Surrey
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
Sealant isn’t the answer to every problem, and we’ll tell you before work begins. It won’t solve:
- Damp that isn’t coming from the joint
- Cracked brickwork or render that needs a builder or plasterer
- Subsidence or other structural problems
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
Surfaces we seal
- Joints between brick and frames
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Façade panels
- Render & cladding joints
Landlord and commercial work in Old Dean
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
What affects the cost of external mastic
Jobs vary more than people expect. What affects the quote:
- How much there is to do
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- When we can work, for business premises
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- What’s wrong with the joints now
- If it’s domestic, commercial or a hotel
- Where the property is
- How many joints, rooms or windows are involved
For external mastic in Old Dean, ring 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.
What else we do in Old Dean
Why deal with it now?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost around the joint, so the damage spreads beyond the joint. Homes in smaller places like Old Dean can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
What you get with us
- Full insurance on every job
- Trusted Arbo and Everbuild sealants
- You choose the colour before work begins
- Domestic, commercial and hotel work
Take a look at our cost guide or what customers say.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
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.
What external mastic looks like in Old Dean
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.
In the older streets around St Martin's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant. For site and facilities teams at buildings such as Collingwood College, its movement joints, gutters and trims need looking after like any other building’s. Letting a property close to Camberley station? Then split movement joints are easy to miss on a rental until damp shows inside.
Old Dean is about 1 mile north-east of Camberley, in Surrey. If you need external mastic in Old Dean, 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 area takes in 395 places across Surrey, from the larger towns to small villages. We also work in Reading, about 13 miles from Old Dean.
Jobs for external mastic in GU15 and GU19 works the same way as everywhere else we cover. Local streets include Esher Road, Gibbet Lane and Sutton Road, and we cover them all. Nearby, we also carry out external mastic in Camberley (1 mile south-west), York Town (2 miles south-west), Frimley (3 miles south), College Town (3 miles west) and Watchmoor (3 miles south-west). Larger places within reach include Guildford (9 miles south-east), Woking (7 miles east), Farnham (10 miles south), Egham (9 miles north-east), Walton-on-Thames (14 miles east) and Staines-upon-Thames (11 miles north-east).
What’s near Old Dean
In Old Dean, that means homes and buildings near Pine Ridge Infant School, Poors Allotment and Jolly Farmer pub. The nearest railway station is Camberley station, about 1.5 miles south-west. Well-known places in the area include Frimley Park Hospital (2.4 miles south-west) and Surrey Heath Museum (1.4 miles south-west). For a walk, there’s Heath Lake and Wildmoor Heath.
Common questions in Old Dean
Can you do external mastic in Old Dean?
Yes, Old Dean is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
Can you help a landlord with a rental near Camberley station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
How long does external mastic last?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges, and reseal at that point.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
Is it OK to seal over old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.
Looking after it afterwards
Aftercare is simple:
- Avoid pressure-washing directly into sealant joints
- Keep movement joints as flexible joints, not mortar
- Look over the joints every year, ideally after winter
- Deal with leaking gutters that soak the joints below
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we will take it from there. The work itself takes a few hours to a few days, depending on the length of joint and the access from start to finish. Parking around Old Dean is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Clear items away from the joints we are working on
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any previous sealing or DIY attempts
How to get a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.