Slough · England
External & façade joints in Horton, Slough
External mastic in Horton 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
- Plants rooting in failed movement joints
- Joints where the bead has come unstuck
How we handle external mastic in Horton
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. We work on concrete & block, façade panels and render & cladding joints, and people most often call us about movement joints filled with mortar instead of sealant and panel joints letting water in.
Around Horton, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water generally gets in, and they need the right sealant at the right depth.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Horton (SL3, TW19)
- Wider area
- Slough
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Why act early in Horton
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. Where a wall is exposed, as many are in small places like Horton, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
What you get with us
- We never seal over old sealant
- Approved under the ARBOMaster scheme
- Experience in homes, commercial sites and hotels
- Colour picked to suit the job
Read what affects the cost and what customers say.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, 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.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Towns and villages near Horton
More services for Horton
Common questions in Horton
Do you cover Horton for external mastic?
Yes. Our work covers London and the South East, and Horton is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Is Horton within the area you cover?
Yes. Horton is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Will the new joint stand out?
The sealant colour is picked to suit the wall. There’s a wide choice of exterior colours.
How do I get a quote for external mastic in Horton?
It depends on the job, so we quote each one individually. For a quick quote, ring 0345 464 0079 or drop us an email with a short description of the job.
Do you have insurance?
Yes, we are fully insured for domestic and commercial work.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
When it isn’t the sealant
We’d rather tell you now than do work that will not last, so these are the limits:
- Failed render or damaged cladding panels
- Cracks in the bricks or render themselves, away from the joints
- Cutting new joints into brickwork, which is building work rather than sealant work
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Joints between brick and frames
- Façade panels
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Ask before painting over external sealant
- Deal with leaking gutters that soak the joints below
- Keep soil, plants and ivy away from the joints
- Keep high-pressure jets off the joints
Don’t paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint, and paint can crack as the joint moves.
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, all bigger jobs than a reseal.
External mastic in Horton: local notes
Historic houses like Frogmore House (about 2.5 miles west) are a reminder that the area around Horton 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. The South East is one of 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 Michael include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain. If you look after a building such as Colnbrook Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing. Letting a property close to Sunnymeads station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Horton is about 3 miles north of Egham, in Slough. Wherever you are in the SL3 postcode area, we can carry out external mastic at your property. Across Slough, we cover 31 places, and Horton is one of them. Our London page covers work nearby.
Our applicators cover all of SL3 and TW19 for external mastic and the streets around it. Streets in the area include Stanwell Road, Bells Lane and Foundry Lane. We also cover the places around Horton: Brands Hill (1 mile north), Colnbrook (1 mile north-east), Sunnymeads (1 mile west), Poyle (1 mile north-east) and Wraysbury (1 mile south-west). Within a short drive, we also cover Slough (4 miles north-west), Cippenham (5 miles north-west), Chalvey (4 miles north-west), Britwell (6 miles north-west), Upton (3 miles north-west) and Burnham (7 miles north-west).
Landmarks near Horton
In Horton, that means homes and buildings near The Five Bells Public House, Langley Grammar School and Arthur Jacob Nature Reserve and the streets around them. For rail, the closest station is Sunnymeads station, about 1 mile west of the centre. Well-known places in the area include Upton Hospital (3.3 miles north-west) and Windsor Castle (3 miles west). For a walk, there’s Staines Reservoirs.
Landlords, agents and businesses in Horton
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
The process
There’s no need to move everything out, just the space around the work. We protect the rest, and the job takes anything from a few hours to several days, depending on the building for a typical job. Somewhere as small as Horton, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Clear items away from the joints we’re working on
- Let us know about parking restrictions
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
For a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Related advice
How we quote for external mastic
The price is agreed before any work begins. It’s based on:
- The type of sealant required
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
- Whether there’s mould to deal with
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What to tell us for a quote
When you contact us, it’s useful to know:
- The type of property
- Access, such as stairs, a lift or height
- The address or postcode of the job
- Whether it has been sealed before
Want a quote for external mastic? Please phone 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.