West Berkshire · England
Hermitage External Mastic
Movement joints in Hermitage need attention? We cut out the old, prepare the joints and apply the right sealant.
- Weathered mastic that no longer stretches
- Joints where the bead has come unstuck
- Joints pointed up with cement by mistake
About our external mastic in Hermitage
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. If you have leaking joints around cladding and façade panels and rigid filler in a joint that should flex, we can put it right, on concrete & block, render & cladding joints and brickwork movement joints alike.
In a village or hamlet like Hermitage, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
Big or small, you get the same one-year guarantee in Hermitage and across West Berkshire.
- Place
- Hermitage (RG18)
- Wider area
- West Berkshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Hermitage
Is Hermitage in your area for external mastic?
Yes. We work across London and the South East, and Hermitage is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Do you work for landlords with property near Newbury Racecourse station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
What do you need from me for a quote?
Tell us what needs doing and where, with photos by email if possible. If we need more, we’ll ask.
What does external mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Are you insured?
Yes, we are fully insured for every job we do.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
How long does external mastic take?
A typical job takes a few hours to a few days, depending on the length of joint and the access. We’ll confirm how long when we quote.
When will the joints need doing again?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges, and reseal at that point.
What else we do in Hermitage
When to call us in Hermitage
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and speed up the damage.
The problems people generally mention when they call are:
- Brick movement joints where the sealant has split
- Movement joints filled with mortar instead of sealant
- Failed sealant between panels on a façade
- Failed seals between different materials
Homes close to Holy Trinity include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Before you book anyone
- What the quote includes, VAT included or not
- What happens if the job turns out different
- How long to leave it before use
- Is the old sealant removed completely?
Should I try it myself first?
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
What we do, step by step
We bring everything the job needs with us. Once we have agreed what’s being done, the area is protected and the work begins. It normally takes a few hours for a handful of joints, longer for a whole elevation. In a small place like Hermitage, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each joint, agreeing the ones to redo and how we will 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.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- For business premises, tell us about site rules or sign-in
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Simply phone 0345 464 0079 or drop us an email and describe the job, and pictures are welcome.
Related advice
Surface by surface
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. We choose the product to suit.
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Honest limits
Before booking, it’s worth knowing the limits:
- Rising or penetrating damp from elsewhere in the wall
- Cracks in the bricks or render themselves, away from the joints
- Failed render or damaged cladding panels
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think.
Where we work in Hermitage
- Joints between brick and frames
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Façade panels
- Render & cladding joints
Why deal with it now?
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. A stiffer product can damage the joint edge as it fails. Where a wall is exposed, as many are in small places like Hermitage, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Why Hermitage clients choose us
- Colour agreed with you before we start
- We leave the area clean and tidy
- Sanitary silicone with an anti-fungal additive in wet areas
- Over 20 years’ experience
See what affects the cost and our reviews.
Hermitage buildings and the weather
With historic houses such as Shaw House (about 3.4 miles south-west) nearby, there’s older building stock in the area around Hermitage as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. 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.
Letting a property close to Newbury Racecourse station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you look after a building such as Hermitage Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Hermitage is about 4 miles north of Thatcham, in West Berkshire. Across the RG18 area, we can carry out external mastic at your property. Across West Berkshire, we cover 155 places, and Hermitage is one of them. For nearby work, see our Reading page.
Jobs for external mastic in RG18 works the same way as everywhere else we cover. We cover properties on Newbury Road, Lipscomb Close and Marlston Road and the roads around them. We also cover the places around Hermitage: Longlane (1 mile south-west), Little Hungerford (1 mile north-east), Oare (1 mile north), Wellhouse (1 mile east) and Curridge (1 mile south-west). Larger places within reach include Newbury (4 miles south-west), Thatcham (4 miles south), Burghfield Common (10 miles east), Speenhamland (4 miles south-west), Hungerford (11 miles west) and Spencers Wood (14 miles east).
Local landmarks in Hermitage
In Hermitage, that means homes and buildings near The White Horse pub, among other places. Hermitage’s nearest station is Newbury Racecourse station, roughly 4 miles south. Well-known places in the area include Hampstead Norris Castle (2.4 miles north-east) and West Berkshire Community Hospital (3.3 miles south). For a walk, there’s Snelsmore Common.
How we quote for external mastic
Call for a quick quote. The main things that affect it are:
- Working hours on commercial sites
- The product the joint needs
- Access and height
- Any mould that needs treating
The cost depends on how much there is to do, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- If it’s domestic, commercial or a hotel
- The problem you’ve noticed
- Roughly how big the job is
- Any previous sealing or DIY work
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, phone 0345 464 0079 or drop us an email.