West Berkshire · England
External & façade joints in Wellhouse, West Berkshire
Our applicators work in Wellhouse on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Brick movement joints where the sealant has split
- Gaps where render, brick and frames meet
- Movement joints filled with mortar instead of sealant
How we handle external mastic in Wellhouse
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the joint does not stand out. We work on render & cladding joints, façade panels and brickwork movement joints, and the jobs we see most are failed sealant between panels on a façade and damp patches traced to an open external joint.
Outside joints can only be sealed when they’re dry, so work in Wellhouse is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Where
- Wellhouse (RG18)
- Wider area
- West Berkshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Quotes for external mastic in Wellhouse
There’s no set price list. What we look at:
- The size of the job
- How easy the joints are to reach
- Whether old sealant or filler has to be cut out
- The product the joint needs
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- The address or postcode of the job
- Whether it has been sealed before
- Access, such as stairs, a lift or height
- The rough size of the job
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work.
More services for Wellhouse
Wellhouse: your questions answered
Can you do external mastic in Wellhouse?
Yes, Wellhouse is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Do you cover smaller places like Wellhouse?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
How often do external joints need resealing?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Every job carries our 12-month guarantee.
How long will you be here?
As a guide, most jobs take a few hours to a few days, depending on the length of joint and the access. Larger jobs naturally take longer, and we’ll say how long yours will take.
I’m a tenant. Can you help?
Of course. Check with your landlord; we can send the quote to them too.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used before we leave.
Do you use backing rod?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back so the bead can stretch.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Leave it or put it right?
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly once. Around Wellhouse, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
What it costs depends on the amount of work, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
Why choose Mr Mastic in Wellhouse
- Over 20 years’ experience
- Fully insured
- Anti-fungal silicone where joints get wet
- White, clear, grey or coloured to suit, where the product allows
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Outside joints around Wellhouse
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Shaw House (about 3.7 miles south-west) nearby, there’s older building stock in the area around Wellhouse as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Rented homes near Thatcham station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. For an older house near a landmark such as Church of St Mary, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Wellhouse is about 3 miles north of Thatcham, in West Berkshire. Every kind of property in Wellhouse is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Across West Berkshire, we cover 155 places, Wellhouse among them. For nearby work, see our Reading page (12 miles or so).
Jobs for external mastic in RG18 is quoted and booked the same way as anywhere else. We also cover the places around Wellhouse: Hermitage (1 mile west), Little Hungerford (1 mile north-west), Oare (1 mile north-west), Longlane (1 mile west) and Cold Ash (2 miles south). Within a short drive, we also cover Newbury (5 miles south-west), Thatcham (3 miles south), Burghfield Common (9 miles south-east), Speenhamland (4 miles south-west), Hungerford (12 miles west) and Spencers Wood (13 miles east).
Local landmarks in Wellhouse
Locally, jobs take us to homes and businesses close to The White Horse pub and the streets around them. The closest station to Wellhouse is Thatcham station, roughly 3.9 miles south of the centre. Well-known places in the area include Hampstead Norris Castle (2.2 miles north) and West Berkshire Community Hospital (3.4 miles south-west). Open spaces near Wellhouse include Nature Discovery Centre.
Landlords, agents and businesses in Wellhouse
If you manage several properties in or around Wellhouse, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Common problems we fix in Wellhouse
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
Most people get in touch when they notice something like this:
- Water getting into walls through failed joints
- Sealant that has lost its bond to the brick or render
- Failed sealant between panels on a façade
- Hard, crazed mastic that has stopped moving
For site and facilities teams at buildings such as Hermitage Primary School, its movement joints, gutters and trims need looking after like any other building’s.
What to look for in a quote
- How hidden problems are handled
- Who does the work, and how experienced they are
- What preparation is included
- What product goes in the joint
What happens on the day
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes a few hours for a handful of joints, longer for a whole elevation, and the area is left clean. For a village or hamlet like Wellhouse, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Mention if the joints have been sealed before
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that is easy.
Related advice
Surface by surface
Cladding and façade panels
Cladding and façade panels are generally separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it and keep the sealant to the right depth.