West Berkshire · England
Longlane External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for householders, landlords and businesses in Longlane. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Failed sealant between panels on a façade
- Sealant pulling away from one side of the joint
- Plants rooting in failed movement joints
Work for landlords, hotels and businesses
For anyone letting property in or around Longlane, several properties can go on one quote. Send us the addresses and the work at each.
Landlords and letting agents in Longlane can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
External mastic in Longlane, done properly
For buildings in Longlane, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you’re dealing with rain getting behind render or cladding at a joint and sealant pulling away from one side of the joint, we can help, whatever the surface.
In a village or hamlet like Longlane, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Every job is covered by a 12-month guarantee.
- Location
- Longlane (RG18)
- Wider area
- West Berkshire
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Also in Longlane
What we are called out for in Longlane
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
It’s worth asking for a quote if you see:
- Movement joints filled with mortar instead of sealant
- Joints with sealant missing in places
- Old sealant gone brittle and cracked
- Moss and dirt in joints with no sealant left
For an older house near a landmark such as Holy Trinity, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What your quote should include
- The length of the guarantee
- When the joint can take water or movement
- What product goes in the joint
- Whether all the old sealant comes out first
External mastic in Longlane: local notes
With historic houses such as Shaw House (about 2.7 miles south-west) nearby, there’s older building stock in the area around Longlane as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Curridge Primary School, larger buildings have long runs of movement joint that eventually need resealing. Rented homes near Newbury Racecourse station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Longlane is about 3 miles north of Thatcham, in West Berkshire. Every kind of property in Longlane is covered for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. 155 places in West Berkshire are on our list. Reading is on our list too, about 13 miles from Longlane.
Every address in RG18 is covered for external mastic. If you need external mastic at a property on Sandy Close, Long Lane and Curridge Piece or anywhere close by, our applicators can take on the job. Other places close to Longlane include Curridge (1 mile west), Hermitage (1 mile north-east), Wellhouse (1 mile east), Oare (1 mile north) and Little Hungerford (1 mile north-east). Larger places within reach include Newbury (4 miles south-west), Thatcham (3 miles south), Burghfield Common (10 miles east), Speenhamland (3 miles south-west), Hungerford (10 miles west) and Spencers Wood (14 miles east).
Landmarks near Longlane
Around Longlane, our work takes us to homes and buildings near The Bunk Inn and the streets around them. For rail, the closest station is Newbury Racecourse station, roughly 3.3 miles south of the centre. Nearby you’ll also find West Berkshire Community Hospital (2.7 miles south) and British Balloon Museum & Library Ltd (3.4 miles south-west). The countryside around Longlane includes Snelsmore Common.
What happens if it’s left?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. 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 Longlane, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
Why choose Mr Mastic in Longlane
- We leave the area clean and tidy
- Colour picked to suit the job
- Fully insured
- Sanitary silicone with an anti-fungal additive in wet areas
Read how sealant jobs are priced or our reviews.
What affects the cost of external mastic
For a quick quote, just ask. The main things that affect it are:
- The amount of work
- The old material and how stubborn it is
- Any working-time requirements on site
- The number of rooms or windows
What it costs depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Helping us quote
You do not need to know the technical terms. Just tell us:
- Pictures of the joints, sent by email
- Where the property is
- Whether it’s a home or a business
- What’s wrong with the joints now
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Different surfaces, different methods
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. We prime where the product needs it.
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.
Longlane: your questions answered
Do you work for landlords with property near Newbury Racecourse station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Will you come out to Longlane?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can new sealant go over the old?
No, and we never do. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin.
Will there be a smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
How do I get a quote for external mastic in Longlane?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Can you reach joints on upper floors?
It depends on the height and the site. Low-level joints are straightforward; for higher ones, send details and we’ll confirm the access.
What is backing rod for?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back.
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Damp that is not coming from the joint
- Loose or hollow render, which needs re-rendering
- Adding movement joints to masonry that has none
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before you book.
What we seal
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
- Façade panels
- Copings & trims
What happens on the day
The work is kept neat and contained to the area we are working on, so you can carry on as normal. Expect the work to take a few hours to a few days, depending on the length of joint and the access, and we explain the cure time before we leave. Somewhere like Longlane needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Move anything stored near the joints
- Let us know if you’ve seen damp or leaks
- Mention any parking rules near the property
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved and give you a clear quote.