Surrey · England
Lyne External Mastic
External mastic for Lyne and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Rain getting behind render or cladding at a joint
- Rigid filler in a joint that should flex
- Panel joints letting water in
What affects the quote in Lyne
Call for a quick quote. What matters most is:
- The type of sealant required
- The number and length of the joints
- The number of rooms or windows
- Access and height
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, call 0345 464 0079 or send us an email for an honest opinion and a quote.
What to tell us for a quote
When you contact us, it’s useful to know:
- Where the property is
- A few photos by email, if you can
- How we’d reach the joints
- What’s wrong with the joints now
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or drop us an email with the details and send photos if you have them.
External mastic in Lyne
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. Typical jobs include old sealant gone brittle and cracked and water getting into walls through failed joints, across copings & trims, joints between brick and frames and concrete & block.
Around Lyne, 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.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Lyne (KT16)
- Wider area
- Surrey
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
More services for Lyne
Different surfaces, different methods
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it or an approved alternative. Tell us what the building has when you get in touch.
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible.
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
Do you need external mastic in Lyne?
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it cannot stretch and rips as the joint opens.
People normally contact us after spotting one of these:
- Rain getting behind render or cladding at a joint
- Plants rooting in failed movement joints
- Leaking joints around cladding and façade panels
- Movement joints filled with mortar instead of sealant
Rented homes near Chertsey station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Before you book anyone
- What happens if they find a problem under the old sealant
- How the surfaces are prepared before sealing
- What the cure time is
- Whether the sealant suits the joint
Landlords, agents and businesses in Lyne
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
The process
There’s no need to move everything out, just the space around the work. We protect the rest, and the job takes a few hours for a handful of joints, longer for a whole elevation for a typical job. Somewhere as small as Lyne, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Let us know if you’ve seen damp or leaks
- Move anything stored near the joints
Get a quote
For a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Related advice
Outside joints around Lyne
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Botleys Mansion (about 1 mile south) nearby, there’s older building stock in the area around Lyne as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Schools such as Lyne and Longcross CofE Aided Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. If you live in an older home near Church of Holy Trinity, an extension built onto an older house moves differently, and the joint between them takes the strain.
Lyne is about 3 miles south of Egham, in Surrey. Across the KT16 area, we can carry out external mastic at your property. 395 places in Surrey are on our list. There’s also a page for Reading, about 19 miles away.
We work across KT16 for external mastic and the streets around it. If you need external mastic at a property on Almners Road, Pantiles Close and Lyne Lane or a nearby road, we can help. Close by, we work in Chertsey (1 mile east), Trumps Green (2 miles west), Ottershaw (2 miles south), Stonehill (2 miles south-west) and Row Town (2 miles south-east). Larger places within reach include Guildford (10 miles south), Woking (5 miles south), Camberley (9 miles south-west), Epsom (12 miles east), Ewell (12 miles east) and Egham (3 miles north).
What’s near Lyne
Typical jobs here are in homes near White Lodge Children's Centre, Salesian School and Riverside Walk and the streets around them. Lyne’s nearest station is Chertsey station, roughly 1.2 miles east. Nearby you’ll also find Spelthorne Museum (3.3 miles north) and St. Peter's Hospital (0.8 miles south-east). Open spaces near Lyne include St Ann's Hill and St Ann's Lake.
Your questions about external mastic in Lyne
Do you cover smaller places like Lyne?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is Lyne in your area for external mastic?
Yes, Lyne is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we will give you a clear price.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages to suit the site.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces.
How long before the joint can be used?
Cure times vary by product and the conditions. Before we leave, we’ll tell you the cure time.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.
What colours does the sealant come in?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin, matched as closely as the range allows.
How long does external mastic take?
That depends on how much there is to do, but most jobs take anything from a few hours to several days, depending on the building. We’ll give you a better idea when we quote.
What happens if it’s left?
A failed movement joint lets water into the wall. Resealing early keeps the job to the joint itself, rather than the wall around it. Where a wall is exposed, as many are in small places like Lyne, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What you get with us
- Approved under the ARBOMaster scheme
- Arbo and Everbuild products
- Anti-fungal silicone where joints get wet
- We agree the colour with you first
Read our cost guide and our reviews.