West Berkshire · England
External Mastic in Three Ashes
Problem with your movement joints in Three Ashes? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Joints where the bead has come unstuck
- Weeds or debris growing in open joints
- Damp patches traced to an open external joint
Surface by surface
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
External mastic in Three Ashes
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a matching colour. If you are dealing with weathered mastic that no longer stretches and weeds or debris growing in open joints, we can help, whatever the surface.
Older homes in small places like Three Ashes may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Location
- Three Ashes (RG7)
- Region
- West Berkshire
- Cover
- A year, on every job
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Three Ashes
What else we do in Three Ashes
How we quote for external mastic
We do not publish a price list. The quote depends on:
- Mould in or behind the old joints
- Any working-time requirements on site
- The product the joint needs
- How easy the joints are to reach
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
What to tell us for a quote
You don’t need to know the technical terms. Just tell us:
- Any access issues, like height or stairs
- What’s wrong with the joints now
- Where the property is
- Photos by email, if that’s easy
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
What external mastic looks like in Three Ashes
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. With historic houses such as The Vyne (about 2.8 miles south) nearby, there’s older building stock in the area around Three Ashes as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Rented homes near Bramley (Hants) station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. Homes close to Church of St. Mary include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. Managing a site like Silchester Church of England Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
Three Ashes is about 3 miles east of Tadley, in West Berkshire. For external mastic in and around Three Ashes, please phone 0345 464 0079 or drop us an email for a quick quote. We cover West Berkshire from our Crawley base. Three Ashes is one of 155 places in West Berkshire where we work. Reading is on our list too, around 8 miles away.
All of RG7 is within our area for external mastic. If you’re just outside Three Ashes, we cover Bramley (1 mile south-east), Mortimer West End (2 miles north), West End Green (2 miles east), Mortimer (2 miles north) and Bramley Green (2 miles south-east). Further out, we also cover Newbury (11 miles west), Thatcham (8 miles north-west), Burghfield Common (4 miles north), Speenhamland (11 miles west), Spencers Wood (6 miles north-east) and Calcot (7 miles north).
Landmarks near Three Ashes
Three Ashes’s nearest station is Bramley (Hants) station, about 1.5 miles south-east of the centre. A little further out are Calleva Museum (0.9 miles north-west) and Basingstoke and North Hampshire Hospital (4.8 miles south). For a walk, there’s Daneshill Park Woods.
How the visit works
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from a few hours to several days, depending on the building. For a village or hamlet like Three Ashes, the journey is planned in advance: 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 walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires 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
- For indoor joints, keep the area dry beforehand if you can
- On commercial sites, let us know about site rules
- Plan for the work area to be out of bounds to pets and children
Get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
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Your questions about external mastic in Three Ashes
I let a flat near Bramley (Hants) station. Can you help?
Yes. We work for letting agents and landlords as well as householders. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Do you cover Three Ashes for external mastic?
Yes, Three Ashes is within the area we cover. Our work covers London and the South East. 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.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Can a movement joint be filled with mortar?
No. Cement or mortar cannot stretch and the joint fails. If it has already been filled, we can generally cut it out and reseal it.
Is it OK to seal over old sealant?
No, it won’t last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
How long before the joint can be used?
It depends on the product and the temperature. We tell you how long to leave it before we go.
How often do external joints need resealing?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year and renew it when it starts to fail.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Clear growth from the base of walls and joints
- Avoid pressure-washing directly into sealant joints
- Look over the joints every year, ideally after winter
- Keep movement joints as flexible joints, not mortar
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
Work for landlords, hotels and businesses
Hotels need rooms back in use, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
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.
DIY versus a professional finish
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.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Walls that need new movement joints cut into them
- Damp that isn’t coming from the joint
- Structural movement, which needs a surveyor or engineer
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before booking.
What we seal
- Façade panels
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Joints between brick and frames