Oxfordshire · England
External & façade joints in Hardwick, Oxfordshire
Sealing brickwork movement joints, render, cladding and façade joints in Hardwick, with a one-year guarantee on every job. Call for a quick quote.
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
- Rain getting behind render or cladding at a joint
DIY sealant or a professional job?
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.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
About our external mastic in Hardwick
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. We work on façade panels, brickwork movement joints and copings & trims, and people most often call us about sealant that has lost its bond to the brick or render and weeds or debris growing in open joints.
In a village or hamlet like Hardwick, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
We stand behind the work with a 12-month guarantee, so you are covered after we’ve gone.
- Location
- Hardwick (OX29)
- Wider area
- Oxfordshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we’re called out for in Hardwick
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and make things worse.
The most common problems we see are:
- Panel joints letting water in
- Moss and dirt in joints with no sealant left
- Cracked joints where brick meets render or frames
- Hard, crazed mastic that has stopped moving
If you live in an older home near Church of St Mary, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Questions to ask before booking
- What product goes in the joint
- When the joint can take water or movement
- How hidden problems are handled
- The length of the guarantee
How the job changes by surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
Why deal with it now?
A failed movement joint lets water into the wall, behind render and cladding. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Older cottages and farmhouses around Hardwick can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts.
Why book with us
- Sealant colour chosen to suit
- We’re fully insured
- 20+ years of sealant experience
- You choose the colour before work begins
See what affects the cost and what customers say.
Quotes for external mastic in Hardwick
The price is agreed before any work begins. It takes into account:
- Working hours on commercial sites
- The number of rooms or windows
- The type of sealant required
- Any mould that needs treating
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
What we need to know
To make quoting easier, please include:
- The address or postcode of the job
- Photos by email, if that’s easy
- How we’d reach the joints
- The type of property
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few photos by email make the job easier to understand, and we will take it from there.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Keep soil, plants and ivy away from the joints
- Ask before painting over external sealant
- Check external joints each spring
- Never let anyone fill a movement joint with mortar
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.
Small splits are the time to act. At that stage it’s a simple cut out and reseal before water has had years to get in.
What else we do in Hardwick
Hardwick: your questions answered
Can you do external mastic in Hardwick?
Yes. We work across London and the South East, and Hardwick is part of that. You can phone 0345 464 0079 or email us and tell us what needs doing.
Will you come out to Hardwick?
Yes. Hardwick is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do I need to be at home?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and we will quote it together.
What does external mastic cost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before work begins.
Where do you work from?
We work from Crawley. We cover Hardwick and the rest of Oxfordshire, along with the rest of our area.
Is the work guaranteed?
Yes. Every job comes with our one-year guarantee.
What is backing rod for?
That is backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only.
Walls and rooflines in Hardwick
With historic houses such as Longworth House (about 4.1 miles south) nearby, there’s older building stock in the area around Hardwick 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Around Hardwick, as everywhere, external mastic is only as good as the preparation behind it.
Hardwick is about 3 miles south-east of Witney, in Oxfordshire. Our applicators cover external mastic for homes and businesses in Hardwick and nearby, as part of our work across Oxfordshire. Across Oxfordshire, we cover 443 places, Hardwick among them. We also work in Oxford, about 9 miles from Hardwick.
Work in OX29 is quoted and booked the same way as anywhere else. Hardwick sits on or near the B4449, which makes travel easy. We also cover the places around Hardwick: Brighthampton (2 miles south), Ducklington (2 miles north-west), Standlake (2 miles south-east), High Cogges (2 miles north) and South Leigh (2 miles north-east). Within a short drive, we also cover Oxford (9 miles east), Didcot (13 miles south-east), Abingdon-on-Thames (9 miles south-east), Witney (3 miles north-west), Carterton (6 miles west) and Wantage (11 miles south).
Local landmarks in Hardwick
Well-known places in the area include Hinton Waldrist Castle (4.2 miles south) and Cogges Manor Farm Museum (2.6 miles north-west).
The process
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Hardwick, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- 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.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- For indoor joints, keep the area dry beforehand if you can
- Let us know about earlier repairs to the joints
How to get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.