Surrey · England
Staines-upon-Thames External Mastic
External mastic for Staines-upon-Thames and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Old sealant gone brittle and cracked
- Moss and dirt in joints with no sealant left
- Panel joints letting water in
Common questions in Staines-upon-Thames
Is Staines-upon-Thames in your area for external mastic?
Yes. Our work covers London and the South East, and Staines-upon-Thames is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear price.
What guarantee comes with external mastic in Staines-upon-Thames?
All our work, in Staines-upon-Thames and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we’re using and why.
What colours does the sealant come in?
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 landlords and businesses book you?
Yes, regularly. Several properties can be quoted together, and between tenancies is a good time for the work.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
External mastic in Staines-upon-Thames, done properly
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We take the old material out and do it properly. We are often asked to deal with cracked joints where brick meets render or frames and weathered mastic that no longer stretches, across façade panels, copings & trims and concrete & block.
Extensions are a common sight on houses around Staines-upon-Thames, and the joint where new wall meets old is a classic place for water to get in. Getting the joint depth right matters as much as the sealant itself.
Big or small, you get the same one-year guarantee in Staines-upon-Thames and across Surrey.
- Location
- Staines-upon-Thames (TW18, TW20, TW19)
- Region
- Surrey
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Why act early in Staines-upon-Thames
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. Black mould and gaps in sealant do not fix themselves, and in a busy home in Staines-upon-Thames they get worse with every use. Now is the easy time to put it right.
Doing several joints on one visit usually makes better use of the time than several visits. We’ll give you a clear price for the lot.
What you get with us
- Trusted Arbo and Everbuild sealants
- More than 20 years in sealant work
- Colour picked to suit the job
- An ARBOMaster approved applicator
Take a look at what affects the cost or customer reviews.
The process
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours to a few days, depending on the length of joint and the access. A visit in Staines-upon-Thames needs access to the work and a place to park close by. If the job is outside, mention gates, side access and anything above ground floor.
- We start by walking round the building and agreeing the joints and the access.
- 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
- For indoor joints, keep the area dry beforehand if you can
- Clear items away from the joints we’re working on
- Mention any parking rules near the property
How to get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or email us with a few details. We will explain what we’d do and give you a clear quote before work begins.
Advice
Outside joints around Staines-upon-Thames
Historic houses like Botleys Mansion (about 4 miles south) are a reminder that the area around Staines-upon-Thames has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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.
Homes close to Church of St Peter include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant. If you look after a building such as Riverbridge Primary School, its movement joints, gutters and trims need looking after like any other building’s. If you let a flat or house near Staines station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Staines-upon-Thames is about 7 miles south-west of Hayes, in Surrey. Anywhere in TW18, we cover external mastic for homes and businesses. Our Surrey coverage runs to 395 places, Staines-upon-Thames among them. We also work in London, around 18 miles away.
All of TW18, TW20 and TW19 is within our area for external mastic. If you need external mastic at a property on High Street, Goring's Square and London Road or anywhere close by, our applicators can take on the job. Staines-upon-Thames sits on or near the A308 and A320. Other places close to Staines-upon-Thames include Egham Hythe (1 mile south-west), Penton Hook (2 miles south), Hythe End (2 miles north-west), Egham (2 miles west) and Thorpe (2 miles south-west). We also work in nearby towns such as Guildford (13 miles south), Woking (8 miles south), Camberley (12 miles south-west), Epsom (12 miles south-east), Ewell (12 miles south-east) and Walton-on-Thames (5 miles south-east).
Around Staines-upon-Thames
Typical jobs here are in homes near The Star pub, Penton Park and The Magna Carta School. Staines-upon-Thames has its own railway station: Staines station. Nearby you will also find Ashford Hospital (1.8 miles north-east) and Spelthorne Museum (0.5 miles north-west). For a walk, there’s Staines Reservoirs and Kempton Park Reservoirs.
Places near Staines-upon-Thames
Other services in Staines-upon-Thames
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Keep water from gutters off the wall
- Check the sealant is paintable before painting near it
- Avoid pressure-washing directly into sealant joints
- Make sure movement joints are not pointed over
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
What we cannot put right
A few problems are outside what sealant work can do:
- Failed render or damaged cladding panels
- Movement that’s more than a sealant joint can take
- Cracks in the bricks or render themselves, away from the joints
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Joints and surfaces we work on
- Render & cladding joints
- Concrete & block
- Façade panels
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
Quotes for external mastic in Staines-upon-Thames
The price is agreed before any work begins. It takes into account:
- Access and height
- Any mould that needs treating
- The number of rooms or windows
- Which sealant suits the joint
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we will go through it with you.
Asking for a quote
Before you ask for a quote, have a think about:
- Any access issues, like height or stairs
- Roughly how big the job is
- Where the property is
- What the problem is, such as mould, gaps, leaks or cracking
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will talk you through the work.
Landlord and commercial work in Staines-upon-Thames
For anyone letting property in or around Staines-upon-Thames, several properties can go on one quote. Send us the addresses and the work at each.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.