West Berkshire · England
External & façade joints in Headley, West Berkshire
Professional external mastic in and around Headley, with old sealant always removed completely.
- Old sealant gone brittle and cracked
- Panel joints letting water in
- Rain getting behind render or cladding at a joint
Why it’s worth doing now in Headley
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. A stiffer product can damage the joint edge as it fails. Older cottages and farmhouses around Headley can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why us?
- 20+ years of sealant experience
- Arbo and Everbuild products
- Approved under the ARBOMaster scheme
- We never seal over old sealant
Take a look at our cost guide and what customers say.
External mastic in Headley
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 matching colour. We work on copings & trims, façade panels and brickwork movement joints, and common reasons people get in touch are brick movement joints where the sealant has split and panel joints letting water in.
Outside joints can only be sealed when they’re dry, so work in Headley is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
Your job is guaranteed for a year, as with all our work.
- Location
- Headley (RG19)
- Region
- West Berkshire
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
Once we are on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to several days, depending on the building. For a village or hamlet like Headley, 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.
- Each joint is checked and the colour of the new sealant agreed.
- 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.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
- Let us know if you’ve seen damp or leaks
Ask for a quote
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
Advice
Landlord and commercial work in Headley
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Have failed joints looked at early
- Show decorators and builders where the movement joints are
- Ask before painting over external sealant
- Keep soil, plants and ivy away from the joints
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Quotes for external mastic in Headley
There’s no set price list, because no two jobs are the same. The quote depends on:
- Access and height
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
- The amount of work
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- The address or postcode of the job
- If someone has resealed it before
- What’s wrong with the joints now
- Photos by email, if that’s easy
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Walls and rooflines in Headley
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. Historic houses like Shaw House (about 4.4 miles north-west) are a reminder that the area around Headley has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
For site and facilities teams at buildings such as Cheam School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. If you live in an older home near Church of St Peter, an extension built onto an older house moves differently, and the joint between them takes the strain. For landlords with property near Thatcham station, outside joints that have cracked can let damp into a rental, so check them between lets.
Headley is about 3 miles south of Thatcham, in West Berkshire. Anywhere in RG19, our applicators can take on external mastic. Headley is one of 155 places in West Berkshire we cover for external mastic. You can also see our page for Reading, about 13 miles away.
Postcode districts we cover here for external mastic: RG19. If you need external mastic at a property on Ashford Hill Road, Thornford Road and Harrow Drive or a nearby road, we can help. We also cover Mill Green (1 mile east), Plastow Green (1 mile south-east), Heads Hill (1 mile north-west), Goose Hill (1 mile east) and Bishop's Green (1 mile west). Further out, we also cover Newbury (4 miles north-west), Thatcham (3 miles north), Burghfield Common (9 miles east), Speenhamland (4 miles north-west), Hungerford (12 miles west) and Spencers Wood (12 miles east).
What’s near Headley
Around Headley, our work takes us to homes and buildings near New Greenham Park, among other places. The nearest railway station is Thatcham station, about 2.3 miles north of the centre. Nearby you’ll also find West Berkshire Community Hospital (3.5 miles north-west) and Old Chapel Textile Centre (1.4 miles north-west). The countryside around Headley includes Thatcham Reed Beds and Ladle Hill.
More services for Headley
When something else is needed
In fairness, there are a few things sealant won’t fix:
- Rising or penetrating damp from elsewhere in the wall
- Movement that is more than a sealant joint can take
- Adding movement joints to masonry that has none
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think before you book.
Joints and surfaces we work on
- Façade panels
- Joints between brick and frames
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
FAQs for Headley
Do you cover smaller places like Headley?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you do external mastic in Headley?
Yes, Headley is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
What is a movement joint?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
Is it OK to fill a movement joint with cement?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.