Surrey · England
Merrow External Mastic
Movement joints in Merrow need attention? We cut out the old, prepare the joints and apply the right sealant.
- Brick movement joints where the sealant has split
- Weathered mastic that no longer stretches
- Water getting into walls through failed joints
External mastic in Merrow, done properly
Low-level joints can usually be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what’s needed to reach them safely. We’re often asked to deal with panel joints letting water in and weathered mastic that no longer stretches, across render & cladding joints, brickwork movement joints and joints between brick and frames.
In and around Merrow, older properties sit alongside newer ones, each with its own outside joints. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
A one-year guarantee comes as standard, so you are covered after we have gone.
- Place
- Merrow (GU1, GU4)
- Region
- Surrey
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
The process
All our tools and materials come with us in the van. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours to a few days, depending on the length of joint and the access. For a job in Merrow, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We start by walking round the building and agreeing the joints and the access.
- 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Keep children and pets away from the work area
- Move anything stored near the joints
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
To get a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before any work starts.
Advice
Merrow questions
Can you do external mastic in Merrow?
Yes, Merrow is within the area we cover. We work across London and the South East. Just phone 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 Clandon station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before we start.
How long will you be here?
It depends on the size of the job, but most jobs take a few hours to a few days, depending on the length of joint and the access. We will tell you when we quote.
Will the new joint stand out?
We choose a sealant colour to suit the brick, stone or render. Exterior sealants come in a good range of colours.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme.
What do you put in the joint?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
How do you reach high-level joints?
That depends on the building and the joints. Where joints can be reached safely, we’ll do them. Give us some details and we’ll confirm the access.
Is it messy?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Can I do it myself?
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Signs you need external mastic in Merrow
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
It’s worth asking for a quote if you see:
- Plants rooting in failed movement joints
- Water getting into walls through failed joints
- Rigid filler in a joint that should flex
- Panel joints letting water in
Rented homes near Clandon station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Questions to ask before booking
- How the joint is cleaned and prepared
- When the joint can take water or movement
- How the colour is chosen
- Who turns up on the day
Walls and rooflines in Merrow
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Clandon Park (about 0.9 miles east) nearby, there’s older building stock in the area around Merrow as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
For an older house near a landmark such as Church of St John the Evangelist, an extension built onto an older house moves differently, and the joint between them takes the strain. Schools such as Bushy Hill Junior School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Merrow is about 2 miles east of Guildford, in Surrey. Every kind of property in Merrow can book us for external mastic. Every job comes with our 12-month guarantee. We cover 395 towns and villages across Surrey, from the larger towns to small villages. We also work in Crawley, about 17 miles from Merrow.
Here we cover the GU1 and GU4 postcode area for external mastic. Local streets include Park Lane, Grove Road and Wykeham Road, all of which we cover. If you’re just outside Merrow, we cover Burpham (1 mile north-west), Abbotswood (1 mile west), West Clandon (2 miles north-east), Guildford (2 miles west) and Chilworth (2 miles south). We also work in nearby towns such as Woking (5 miles north), Camberley (11 miles north-west), Epsom (13 miles north-east), Farnham (12 miles west), Ewell (14 miles north-east) and Egham (13 miles north).
Around Merrow
Around Merrow, our work takes us to homes and buildings near St Peter's Catholic School, St Peter's Catholic School and Riverside Park. For rail, the closest station is Clandon station, about 1.6 miles north-east. A little further out are Guildford Castle (2.1 miles south-west) and Surrey Infantry Museum (0.6 miles north-east). Not far away are St Martha's Hill and Colyer's Hanger and Silent Pool.
Landlord and commercial work in Merrow
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Letting agents and landlords in Merrow can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Show decorators and builders where the movement joints are
- Act on the first splits you see
- Walk round the building once a year and look at the joints
- Clear growth from the base of walls and joints
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
Towns and villages near Merrow
Also in Merrow
How the job changes by surface
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it, or one the system allows. Send us any details you have about the façade.
Why deal with it now?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and does not last. In an older home around Merrow, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, phone 0345 464 0079 or email us for an honest opinion and a quote.
Why book with us
- Quality sealants from Arbo and Everbuild
- Domestic, commercial and hotel work
- 20+ years of sealant experience
- Anti-fungal sanitary silicone in wet areas
Read our cost guide or what customers say.