West Berkshire · England
External Mastic in Calcot
External mastic in Calcot from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked joints where brick meets render or frames
- Hard, crazed mastic that has stopped moving
- Damp patches traced to an open external joint
External mastic for homes and businesses in Calcot
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a matching colour. We are often asked to deal with joints where the bead has come unstuck and failed seals between different materials, across render & cladding joints, brickwork movement joints and copings & trims.
Outbuildings, garages and conservatories around homes in places like Calcot add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
All our work comes with a 12-month guarantee, wherever you are in West Berkshire.
- Where
- Calcot (RG31)
- Wider area
- West Berkshire
- Guarantee
- A year, on every job
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Can I do it myself?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
What affects the quote in Calcot
The quote reflects the job in front of us. We look at:
- The number of rooms or windows
- Whether the work is at height
- Working hours on commercial sites
- The old material and how stubborn it is
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The problem you’ve noticed
- Any previous sealing or DIY work
- How we’d reach the joints
- Where the property is
Want a quote for external mastic? Please phone 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Keep water from gutters off the wall
- Get split or bare joints resealed while the damage is small
- Check the sealant is paintable before painting near it
- Wash walls gently around the sealant
Keep pressure washers away from the sealant. High-pressure water can lift the edges and let water in behind.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
Your questions about external mastic in Calcot
Can you help a landlord with a rental near Theale station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Is Calcot in your area for external mastic?
Yes, Calcot 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.
Do you guarantee your work?
Yes, always. There’s a 12-month guarantee on every job.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
How do you reach high-level joints?
It depends on the height and the site. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new joint bonds to clean surfaces.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
The process
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to several days, depending on the building. In a smaller place like Calcot, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
- Tell us about any water getting in
Getting a quote
To get a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before work begins.
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Nearby places to Calcot
More services for Calcot
What the job involves on each surface
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap and keep the sealant to the right depth.
Outside joints around Calcot
With historic houses such as Mapledurham House (about 3.1 miles north) nearby, there’s older building stock in the area around Calcot 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. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Theale station, outside joints that have cracked can let damp into a rental, so check them between lets. If you live in an older home near Church of St Michael, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Calcot is about 3 miles west of Reading, in West Berkshire. From the centre of Calcot to the outskirts, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Our West Berkshire coverage runs to 155 places, Calcot among them.
Jobs for external mastic in RG31 works the same way as everywhere else we cover. Whether your property is on Curtis Road, Barclay Road and Royal Avenue or a nearby road, our applicators can take on the job. Close by, we work in Beansheaf Farm (1 mile south-east), Fords Farm (1 mile east), Horncastle (1 mile east), Little Heath (1 mile north) and Theale (1 mile west). Further out, we also cover Newbury (12 miles west), Thatcham (9 miles west), Burghfield Common (3 miles south), Speenhamland (12 miles west), Spencers Wood (5 miles south-east) and Shaw (12 miles west). Being one of West Berkshire’s larger places, Calcot has every kind of property, from flats to offices.
Around Calcot
Typical jobs here are in homes near Murdochs pub, Little Heath School and Calcot Park and the streets around them. For rail, the closest station is Theale station, roughly 1.2 miles south-west of the centre. Other landmarks nearby include Broad Street Mall (3.3 miles east) and Battle Hospital (2.5 miles north-east). Open spaces near Calcot include Moor Copse Nature Reserve and Hosehill Lake.
What we’re called out for in Calcot
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Common reasons people contact us are:
- Joints with sealant missing in places
- Joints where the bead has come unstuck
- Plants rooting in failed movement joints
- Hard, crazed mastic that has stopped moving
If you look after a building such as Calcot Infant School and Nursery, larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- What product goes in the joint
- The length of the guarantee
- What happens if the job turns out different
- Whether they’re fully insured
Why deal with it now?
A low-modulus sealant is chosen because it moves without pulling hard at the 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. Homes in smaller places like Calcot can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
Why us?
- Neat joints and a tidy finish
- Any old sealant cut out fully, not covered over
- We agree the colour with you first
- 20+ years of sealant experience
See our cost guide or what customers say.