West Berkshire · England
Shaw External Mastic
Our applicators work in Shaw on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Leaking joints around cladding and façade panels
- Plants rooting in failed movement joints
- Movement joints filled with mortar instead of sealant
How we handle external mastic in Shaw
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a colour to suit. We work on brickwork movement joints, façade panels and render & cladding joints, and the jobs we see most are joints where the bead has come unstuck and failed sealant between panels on a façade.
Outbuildings, garages and conservatories around homes in places like Shaw add more joints to look after. Leaks generally start at a gutter end, a garage door frame or where an extension meets the house.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Place
- Shaw (RG14, RG18)
- Region
- West Berkshire
- Cover
- 12 months on all our work
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How we quote for external mastic
There’s no set price list, because no two jobs are the same. The quote depends on:
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
- Access and height
- When we can work, for business premises
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
What we need to know
What to tell us when you ask for a quote:
- How many joints, rooms or windows are involved
- How we’d reach the joints
- The type of property
- Photos by email, if that is easy
Asking for a quote is easy: tell us what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we will take it from there.
What the job involves on each surface
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.
Work for landlords, hotels and businesses
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
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.
Common problems we fix in Shaw
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
Common reasons people contact us include:
- Weeds or debris growing in open joints
- Sealant pulling away from one side of the joint
- Brick movement joints where the sealant has split
- Failed seals between different materials
For an older house near a landmark such as Parish Church of St Mary, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Comparing quotes
- What happens if the job turns out different
- Whether they seal over old material or remove it
- Whether VAT is included
- What insurance they hold
What happens if it’s left?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. In an older home around Shaw, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Why us?
- Experience in homes, commercial sites and hotels
- We never seal over old sealant
- Sealant colour chosen to suit
- Anti-fungal silicone where joints get wet
See our cost guide and our reviews.
Walls and rooflines in Shaw
With historic houses such as Shaw House (about 0.3 miles north-west) nearby, there’s older building stock in the area around Shaw as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. 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.
For site and facilities teams at buildings such as St Joseph's Catholic Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Rented homes near Newbury Racecourse station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Shaw is about 1 mile north-east of Newbury, in West Berkshire. Whether you’re in the middle of Shaw or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. 155 places in West Berkshire are on our list. Our Reading page covers work nearby, about 15 miles away.
Every address in RG14 and RG18 is covered for external mastic. Streets in the area include Park Lane, Shaw Road and Kiln Road, all of which we cover. Being close to the A4, Shaw is simple for us to get to. Neighbouring places we cover for external mastic include Speenhamland (1 mile west), Donnington (1 mile north-west), Speen (1 mile west), Bagnor (2 miles west) and Stockcross (3 miles west). We also work in nearby towns such as Burghfield Common (11 miles east), Hungerford (9 miles west), Spencers Wood (15 miles east), Calcot (12 miles east), Lambourn (12 miles north-west) and Burghfield Hill (11 miles east). Shaw is one of the larger places we cover in West Berkshire.
Around Shaw
Locally, jobs take us to homes and businesses close to Victoria Park, Trinity School and Trinity School, among other places. For rail, the closest station is Newbury Racecourse station, about 0.8 miles south-east. Nearby you will also find Donnington Castle (1.3 miles north-west) and West Berkshire Community Hospital (1 mile east). For a walk, there’s Audrey's Meadow.
FAQs for Shaw
Do you cover smaller places like Shaw?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Shaw for external mastic?
Yes, Shaw is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing.
How long does the job take?
A typical job takes a few hours for a handful of joints, longer for a whole elevation. Your quote will say how long we expect yours to take.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Is it OK to fill a movement joint with cement?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Is the work guaranteed?
Yes. Every job comes with a one-year guarantee.
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Get split or bare joints resealed while the damage is small
- Wash walls gently around the sealant
- Keep movement joints as flexible joints, not mortar
- Keep soil, plants and ivy away from the joints
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
A joint that has stopped moving pushes the movement elsewhere, generally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
The process
When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work starts. The work generally takes a few hours to a few days, depending on the length of joint and the access. For a job in Shaw, 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 checking each joint, agreeing the ones to redo and how we’ll reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- Both sides are cleaned back to sound material and primed if needed.
- 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
- Tell us about access, such as stairs, a lift or high-level joints
- Keep children and pets away from the work area
- Mention any parking rules near the property
How to get a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.