West Berkshire · England
External & façade joints in Cold Ash, West Berkshire
External mastic for Cold Ash and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Failed sealant between panels on a façade
- Damp patches traced to an open external joint
- Rigid filler in a joint that should flex
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
External mastic for homes and businesses in Cold Ash
On houses, flats and commercial buildings across Cold Ash, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you have cracked joints where brick meets render or frames and water getting into walls through failed joints, we can help, on façade panels, brickwork movement joints and concrete & block alike.
Outside joints can only be sealed when they’re dry, so work in Cold Ash is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
All our work comes with a 12-month guarantee, wherever you are in West Berkshire.
- Where
- Cold Ash (RG18)
- Region
- West Berkshire
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What sealant work cannot fix
Sealant is not the answer to every problem, and we’d rather say so up front. It won’t solve:
- Movement that is more than a sealant joint can take
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracked brickwork or render that needs a builder or plasterer
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Joints between brick and frames
- Façade panels
- Copings & trims
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
Cold Ash: your questions answered
I let a flat near Thatcham station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Do you cover Cold Ash for external mastic?
Yes, Cold Ash is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing, and we will send you a clear quote.
Can you work on commercial sites?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Can you seal joints between two different materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides, primed where needed.
How long does the job take?
A typical job takes a few hours to a few days, depending on the length of joint and the access, including preparation and clearing up. Your quote will say how long we expect yours to take.
Do the sealants smell?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Towns and villages near Cold Ash
Also in Cold Ash
Leave it or put it right?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. Older cottages and farmhouses around Cold Ash 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 Cold Ash clients choose us
- We never seal over old sealant
- We agree the colour with you first
- 4.9 on Google from 180+ five-star reviews
- White, clear, grey or coloured to suit, where the product allows
Read our cost guide and customer reviews.
Common problems we fix in Cold Ash
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
Most people get in touch after spotting one of these:
- Sealant pulling away from one side of the joint
- Gaps where render, brick and frames meet
- Old sealant gone brittle and cracked
- Movement joints with cracked, split or missing sealant
Rented homes near Thatcham station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What to look for in a quote
- Is VAT in the price?
- What preparation is included
- Whether all the old sealant comes out first
- How hidden problems are handled
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Make sure movement joints are not pointed over
- Point out the joints to other trades
- Deal with leaking gutters that soak the joints below
- Wash walls gently around the sealant
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Once a joint can’t move, the wall finds another way, generally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
For landlords and businesses
If you manage several properties in or around Cold Ash, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
We also work for property managers and facilities teams. Several sites can go on one quote, and we’re fully insured.
Cold Ash buildings and the weather
With historic houses such as Shaw House (about 2.4 miles west) nearby, there’s older building stock in the area around Cold Ash as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. 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.
For an older house near a landmark such as St. Mark's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For site and facilities teams at buildings such as Cold Ash St Mark's C.E. School, larger buildings have long runs of movement joint that eventually need resealing.
Cold Ash is about 2 miles north of Thatcham, in West Berkshire. Every kind of property in Cold Ash is covered for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our West Berkshire coverage runs to 155 places, and Cold Ash is one of them. For nearby work, see our Reading page (13 miles or so).
All of RG18 is covered for external mastic, from the main roads to the quietest streets. Local streets include Harewood Drive, Johnson's Lane and Walters Close, all of which we cover. We also cover the places around Cold Ash: Ashmore Green (1 mile south-west), Stone Copse (1 mile west), Longlane (2 miles north-west), Thatcham (2 miles south) and Wellhouse (2 miles north). Larger places within reach include Newbury (3 miles south-west), Burghfield Common (9 miles east), Speenhamland (3 miles south-west), Hungerford (11 miles west), Spencers Wood (13 miles east) and Calcot (9 miles east).
Near you in Cold Ash
Typical jobs here are in homes near Kennet School, among other places. The nearest railway station is Thatcham station, about 2.3 miles south-east of the centre. Well-known places in the area include West Berkshire Community Hospital (1.8 miles south-west) and British Balloon Museum & Library Ltd (3 miles south-west). For a walk, there’s Nature Discovery Centre.
How it works
There isn’t much for you to do on the day. Show us the job and we will take it from there. The work itself takes a few hours for a handful of joints, longer for a whole elevation from start to finish. Somewhere as small as Cold Ash, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
- Mention any tricky access
Get a quote
For a quote, phone 0345 464 0079 or drop us an email with the location and a short description of the problem. We will give you a clear price before any work starts.