Surrey · England
External & façade joints in Castle Green, Surrey
External mastic for Castle Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked joints where brick meets render or frames
- Sealant that has lost its bond to the brick or render
- Movement joints with cracked, split or missing sealant
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render near the open joint, so the damage spreads beyond the joint. In a small place like Castle Green, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, ring 0345 464 0079 or email us and we will give you an honest view and a quote.
Why us?
- Old sealant always removed completely
- Fully insured
- 180+ five-star Google reviews
- More than 20 years in sealant work
Take a look at what affects the cost and customer reviews.
External mastic for homes and businesses in Castle Green
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a colour to suit. Common call-outs are for movement joints with cracked, split or missing sealant and plants rooting in failed movement joints, across brickwork movement joints, joints between brick and frames and copings & trims.
Outside joints can only be sealed when they’re dry, so work in Castle Green is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
We stand behind the work with a one-year guarantee.
- Where
- Castle Green (GU24)
- Region
- Surrey
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
When to call us in Castle Green
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
People normally contact us when they notice one of these:
- Joints pointed up with cement by mistake
- Sealant that has lost its bond to the brick or render
- Brick movement joints where the sealant has split
- Panel joints letting water in
Schools such as St Lawrence CofE (Aided) Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
What your quote should include
- Whether VAT is included
- Who does the work, and how experienced they are
- Whether they seal over old material or remove it
- How long the guarantee is
Also in Castle Green
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
We work for letting agents and landlords as well as householders. Resealing between tenancies keeps a property looking cared for.
How to look after the new joints
A little care helps the new joints last. We recommend:
- Point out the joints to other trades
- Never let anyone fill a movement joint with mortar
- Keep soil, plants and ivy away from the joints
- Check the sealant is paintable before painting near it
Do not paint over the new sealant unless we’ve said the product is paintable. Many exterior sealants are not designed to be painted.
Once a joint cannot move, the wall finds another way, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
When it isn’t the sealant
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Damp that isn’t coming from the joint
- Cracks in the bricks or render themselves, away from the joints
- Walls that need new movement joints cut into them
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
What we seal
- Façade panels
- Joints between brick and frames
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
What we do, step by step
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. Somewhere as small as Castle Green, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Clear items away from the joints we are working on
- Mention any sign-in or site rules at work premises
- Mention if the joints have been sealed before
Ask for a quote
Every job is quoted individually. Just ring 0345 464 0079 or send us an email with the details and send pictures if you have them.
Related advice
Different surfaces, different methods
Render joints
Water behind render can lead to blown patches. Resealing the joints early keeps water out.
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant.
Outside joints around Castle Green
Historic houses like Botleys Mansion (about 4.2 miles north-east) are a reminder that the area around Castle Green has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Brookwood station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. In the older streets around Church of St Lawrence, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Castle Green is about 2 miles north-west of Woking, in Surrey. We provide external mastic to householders, landlords and businesses in Castle Green and nearby. 395 places in Surrey are on our list, from the larger towns to small villages. For nearby work, see our Reading page, about 18 miles away.
We cover every part of GU24 for external mastic and the streets around it. That includes homes and businesses on Scotts Grove Road, Guildford Road and Scott's Grove Close and the roads around them. Other places close to Castle Green include Penny Pot (1 mile north-west), Coxhill Green (1 mile north-east), Chobham (1 mile north-east), West End (1 mile west) and Bisley (1 mile south-west). Further out, we also cover Guildford (6 miles south), Camberley (5 miles west), Epsom (15 miles east), Farnham (12 miles south-west), Ewell (15 miles east) and Egham (7 miles north-east).
Landmarks near Castle Green
We work in homes and buildings around The Sun Public House, Gordon's School and Milford Green and Coxhill Green and the streets around them. For rail, the closest station is Brookwood station, about 2.6 miles south-west of the centre. Other landmarks nearby include Brookwood Hospital (1.6 miles south) and Chobham Museum (0.8 miles north-east). The countryside around Castle Green includes Brookwood Lye.
Questions from Castle Green
Will you come out to Castle Green?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
I let a flat near Brookwood station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
Can you quote for more than one area?
Yes. Several rooms, windows or areas can go on one quote.
Will the old sealant be removed?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
When is the sealant fully cured?
It depends on the product. Before we leave, we will tell you the cure time.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.