Hampshire · England
Cole Henley External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Cole Henley and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Joints with sealant missing in places
- Weeds or debris growing in open joints
- Joints where the bead has come unstuck
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Have failed joints looked at early
- Keep soil, plants and ivy away from the joints
- Walk round the building once a year and look at the joints
- Wash walls gently around the sealant
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.
External mastic in Cole Henley
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, so once it splits or hardens, the joint stops working and water gets in. We are often asked to deal with movement joints filled with mortar instead of sealant and panel joints letting water in, across render & cladding joints, copings & trims and joints between brick and frames.
Around Cole Henley, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water usually gets in, and they need the right sealant at the right depth.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Place
- Cole Henley (RG28)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Different surfaces, different methods
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joints work hard every day. The sealant is chosen with that in mind.
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
What we are called out for in Cole Henley
Sometimes a movement joint was filled with mortar or a rigid filler by mistake. The joint cannot move, so the wall cracks somewhere else instead.
If you can see any of these, it’s time to have the joints looked at:
- Hard, crazed mastic that has stopped moving
- Brick movement joints where the sealant has split
- Damp patches traced to an open external joint
- Failed seals between different materials
If you look after a building such as Testbourne Community School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What to look for in a quote
- Whether VAT is included
- How long the guarantee is
- How much experience the applicator has
- How the colour is chosen
Also near Cole Henley
What else we do in Cole Henley
Why act early in Cole Henley
A failed movement joint lets water into the wall. Dealing with it early keeps the repair to the joint, rather than the wall around it. Around Cole Henley, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, phone 0345 464 0079 or email us and we will give you an honest view and a quote.
What you get with us
- One-year guarantee on every job
- Sanitary silicone with an anti-fungal additive in wet areas
- Colour picked to suit the job
- 4.9 on Google from 180+ five-star reviews
Walls and rooflines in Cole Henley
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Whitchurch (Hampshire) station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Cole Henley is about 7 miles north-east of Andover, in Hampshire. Every kind of property in Cole Henley can book us for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our area takes in 683 places across Hampshire. We also work in Reading, around 20 miles away.
Every address in RG28 is covered for external mastic, from the main roads to the quietest streets. Close by, we work in Wells-in-the-Field (2 miles south), Freefolk (2 miles south-east), Whitchurch (2 miles south), Wadwick (3 miles north-west) and St Mary Bourne (3 miles west). We also work in nearby towns such as Basingstoke (10 miles east), Winchester (14 miles south), Andover (7 miles south-west), Tadley (10 miles north-east), Hyde (13 miles south) and Popley (11 miles east).
Near you in Cole Henley
For rail, the closest station is Whitchurch (Hampshire) station, roughly 1.4 miles south of the centre. The countryside around Cole Henley includes Ladle Hill.
Common questions in Cole Henley
Do you work for landlords with property near Whitchurch (Hampshire) station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear price.
Is Cole Henley in your area for external mastic?
Yes, Cole Henley is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Are you insured?
Yes, we’re fully insured for domestic and commercial work.
What does external mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area.
How long does external mastic take?
As a guide, most jobs take a few hours for a handful of joints, longer for a whole elevation. Larger jobs naturally take longer, and we’ll tell you how long to expect.
What is a movement joint?
Walls move with heat, cold and moisture, so long walls have planned gaps to take that movement. The gap is sealed with a flexible sealant over backing rod.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
What affects the quote in Cole Henley
We quote each job individually. This is what makes a difference:
- How many rooms, windows or areas are involved
- The amount of work
- Whether the work is at height
- Working hours on commercial sites
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or email us.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
- What the problem is, such as mould, gaps, leaks or cracking
- The address or postcode of the job
For a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
The process
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it generally takes anything from a few hours to several days, depending on the building. Somewhere as small as Cole Henley, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Clear the area around the work
- Mention if the joints have been sealed before
- Mention any parking rules near the property
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or send us an email.