Surrey · England
Wraysbury External Mastic
Our applicators work in Wraysbury on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Gaps where render, brick and frames meet
- Joints where the bead has come unstuck
- Plants rooting in failed movement joints
What we’re called out for in Wraysbury
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 new sealant then lets go long before it should.
Most people get in touch when they notice one of these:
- Sealant pulling away from one side of the joint
- Leaking joints around cladding and façade panels
- Joints pointed up with cement by mistake
- Movement joints with cracked, split or missing sealant
If you live in an older home near Church of St Andrew, 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 the sealant suits the joint
- How the colour is chosen
- How much experience the applicator has
- Are they insured?
External mastic in Wraysbury, done properly
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. If you have sealant that has lost its bond to the brick or render and panel joints letting water in, we can put it right, on copings & trims, render & cladding joints and joints between brick and frames alike.
Around Wraysbury, garages, outbuildings and extensions all add to the joints on the outside of a home. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
Big or small, it’s backed by our one-year guarantee.
- Location
- Wraysbury (TW19)
- Region
- Surrey
- Cover
- 12 months on all our work
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Nearby places to Wraysbury
Other services in Wraysbury
How it works
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. In a smaller place like Wraysbury, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
- On commercial sites, let us know about site rules
Getting a quote
We don’t publish a price list, because every job is different. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or send us an email.
Related advice
Landlords, agents and businesses in Wraysbury
In hotels, rooms out of use cost money, so we plan the work room by room. We have worked in hotels as well as homes and businesses.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Leave it or put it right?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That protects surfaces like brick, render and concrete. A stiffer product can damage the joint edge as it fails. Homes in smaller places like Wraysbury 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 each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
What you get with us
- 180+ five-star Google reviews
- 20+ years of sealant experience
- Sanitary silicone with an anti-fungal additive in wet areas
- White, clear, grey or coloured to suit, where the product allows
Take a look at what affects the cost and customer reviews.
Wraysbury: your questions answered
Is Wraysbury within the area you cover?
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.
Is Wraysbury in your area for external mastic?
Yes, Wraysbury is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing.
Can you seal joints between render and window frames?
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.
Do you remove the old sealant?
Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used.
Why is there a gap in my brick wall?
Brickwork, render and cladding all move a little, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
How much does external mastic cost in Wraysbury?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before any work starts.
When something else is needed
In fairness, there are a few things sealant won’t fix:
- Failed render or damaged cladding panels
- Cracking across the wall rather than at a joint
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Joints and surfaces we work on
- Façade panels
- Concrete & block
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
Surface by surface
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joint sealant has to cope with frequent movement. The sealant is chosen with that in mind.
What external mastic looks like in Wraysbury
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Frogmore House (about 1.8 miles north-west) are a reminder that the area around Wraysbury has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
If you let a flat or house near Sunnymeads station, split movement joints are easy to miss on a rental until damp shows inside. Schools such as Wraysbury Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Wraysbury is about 2 miles north of Egham, in Surrey. We carry out external mastic for homeowners, landlords and businesses in Wraysbury and nearby. Wraysbury is one of 395 places in Surrey we cover for external mastic. Reading is on our list too, around 18 miles away.
Postcode districts we cover here for external mastic: TW19. External mastic is available to properties on High Street, Station Road and Waylands and the roads around them. Other places close to Wraysbury include Sunnymeads (1 mile north), Old Windsor (1 mile west), Hythe End (1 mile south-east), Horton (1 mile north-east) and Bishopsgate (2 miles south-west). We also work in nearby towns such as Guildford (15 miles south), Woking (10 miles south), Camberley (11 miles south-west), Epsom (15 miles south-east), Ewell (15 miles south-east) and Walton-on-Thames (8 miles south-east).
Around Wraysbury
Locally, jobs take us to homes and businesses close to The Perserverance Public House, Churchmead School and Arthur Jacob Nature Reserve, among other places. The nearest railway station is Sunnymeads station, about 0.8 miles north. Well-known places in the area include King Edward VII Hospital (2.5 miles north-west) and Berkshire Yeomanry Museum (2.3 miles west). Not far away are St Ann's Hill and Staines Reservoirs.
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
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.