Wokingham · England
Barkham External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Barkham, backed by a one-year guarantee. Call for a quick quote.
- Sealant that has lost its bond to the brick or render
- Weathered mastic that no longer stretches
- Failed seals between different materials
FAQs for Barkham
Do you cover Barkham for external mastic?
Yes. Our work covers London and the South East, and Barkham is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear price.
Do you cover smaller places like Barkham?
Yes. Barkham is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Where do you work from?
We’re a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Is it OK to fill a movement joint with cement?
No. Rigid materials can’t move with the wall and the joint fails. Where a joint has been mortared, it can often be raked out and sealed properly.
Do you work for letting agents?
Yes, often. Several properties can go on one quote, and between tenancies is a good time for the work.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
How do you reach high-level joints?
That depends on the building and the joints. Where joints can be reached safely, we will do them. Tell us about the building and we’ll confirm what access is needed.
What is a movement joint?
A vertical gap in a long brick wall is usually a movement joint. It lets the bricks expand without cracking and needs a flexible seal, not mortar.
External mastic in Barkham, done properly
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. If you are dealing with cracked joints where brick meets render or frames and joints where the bead has come unstuck, we can help.
Somewhere as small as Barkham, homes and farm buildings often face open ground, 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.
Whatever the size of the job, you get the same 12-month guarantee in Barkham and across Wokingham.
- Location
- Barkham (RG40, RG41)
- Wider area
- Wokingham
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best in all weathers.
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Should I try it myself first?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Point out the joints to other trades
- Get split or bare joints resealed while the damage is small
- Keep high-pressure jets off the joints
- Ask before painting over external sealant
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Small splits are the time to act. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
Outside joints around Barkham
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Wokingham station? Then split movement joints are easy to miss on a rental until damp shows inside. For an older house near a landmark such as Church of St James, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Barkham is about 2 miles south-west of Wokingham, in Wokingham. For external mastic in and around Barkham, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Wokingham from our Crawley base. Across Wokingham, we cover 35 places, and Barkham is one of them. We also work in Reading, around 6 miles away.
We cover every part of the RG40 and RG41 postcode area for external mastic and the streets around it. Streets in the area include Barkham Road and Barkham Street, and we cover them all. Close by, we work in Langley Common (1 mile west), Arborfield Garrison (1 mile south-west), California (1 mile south), Finchampstead (3 miles south) and Eversley (3 miles south). Within a short drive, we also cover Reading (6 miles north-west), Woodley (4 miles north), Earley (3 miles north-west), Crowthorne (4 miles south-east), Lower Earley (3 miles north-west) and Newtown (5 miles north-west).
Near you in Barkham
Around Barkham, our work takes us to homes and buildings near The Bull Public House And Smithy, Bohunt School Wokingham and Shepperlands Farm Nature Reserve. Barkham’s nearest station is Wokingham station, roughly 1.9 miles north-east. A little further out are Berkshire Library & Museum of Freemasonry (1.9 miles north) and Wokingham Hospital (1.7 miles north-east). For a walk, there’s Heath Lake and Holt Copse & Joel Park.
Places near Barkham
Other services in Barkham
Why act early in Barkham
A failed movement joint lets water into the wall. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. Where a wall is exposed, as many are in small places like Barkham, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or email us and we’ll talk you through it.
What you get with us
- More than 20 years in sealant work
- 4.9 on Google from 180+ five-star reviews
- Colour agreed with you before work begins
- A choice of colours where the product allows
Take a look at what affects the cost or what customers say.
What we do, step by step
We work through the job in order: protect, prepare, seal, tidy. Typically it takes anything from a few hours to several days, depending on the building, and the area is left clean. Somewhere as small as Barkham, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- 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.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Mention any leaks or damp you’ve noticed
- Mention any tricky access
- Tell us if parking is tricky
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work and give you a clear price.
Read more
What we are called out for in Barkham
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
The most common problems we see are:
- Hard, crazed mastic that has stopped moving
- Brick movement joints where the sealant has split
- Gaps where render, brick and frames meet
- Panel joints letting water in
Managing a site like The Coombes Church of England Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- What product goes in the joint
- Whether you can choose the colour
- Whether VAT is included
- How hidden problems are handled