Bracknell Forest · England
Little Sandhurst External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Little Sandhurst. Fully insured, ARBOMaster approved and guaranteed for a year.
- Joints where the bead has come unstuck
- Rain getting behind render or cladding at a joint
- Plants rooting in failed movement joints
Aftercare tips
A little care helps the new joints last. We recommend:
- Act on the first splits you see
- Keep water from gutters off the wall
- Don’t let climbing plants root in the sealant
- Never let anyone fill a movement joint with mortar
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
External mastic in Little Sandhurst, done properly
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. If you have failed seals between different materials and sealant that has lost its bond to the brick or render, we can help, whatever the surface.
Around Little Sandhurst, garages, outbuildings and extensions all add to the joints on the outside of a home. Leaks generally start at a gutter end, a garage door frame or where an extension meets the house.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Place
- Little Sandhurst (GU47, RG45)
- Region
- Bracknell Forest
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Also near Little Sandhurst
Other services in Little Sandhurst
What external mastic looks like in Little Sandhurst
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.
Homes close to Church of St Michael include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. Managing a site like New Scotland Hill Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
Little Sandhurst is about 1 mile west of Sandhurst, in Bracknell Forest. Homes, rented property, offices and hotels in Little Sandhurst can book us for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Little Sandhurst is one of 41 towns and villages in Bracknell Forest we cover. For nearby work, see our Reading page (10 miles or so).
Our applicators cover all of GU47 and RG45 for external mastic. You’ll find streets such as New Road, Sandy Lane and High Street. Other places close to Little Sandhurst include Yateley (1 mile south-west), Darby Green (2 miles south), Finchampstead (2 miles west), Eversley Cross (2 miles west) and Minley (3 miles south). Larger places within reach include Bracknell (5 miles north-east), Wick Hill (6 miles north-east), Priestwood (5 miles north), Lawrence Hill (6 miles north-east), Binfield (5 miles north) and Quelm Park (6 miles north-east).
Around Little Sandhurst
Typical jobs here are in homes near Fox & Hounds pub, Ambarrow Court and Edgbarrow School. The closest station to Little Sandhurst is Sandhurst station, about 0.6 miles south-east of the centre. Well-known places in the area include Pinewood Hospital (2.2 miles north) and Staff College Museum (2.8 miles east). The countryside around Little Sandhurst includes Wildmoor Heath and Horseshoe Lake.
Little Sandhurst: your questions answered
Can you help a landlord with a rental near Sandhurst station?
Yes. We work for letting agents and landlords as well as householders. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Is Little Sandhurst in your area for external mastic?
Yes. Our work covers London and the South East, and Little Sandhurst is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear price.
Can you quote for more than one area?
Yes. Just list everything you need and we will quote it together.
Can you seal joints between render and window frames?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
How long should I leave it?
That depends on the sealant used, so follow the cure time we give you when we finish.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Is there a guarantee?
Yes. Every job comes with our one-year guarantee.
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
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.
Why deal with it now?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render near the open joint, so the damage spreads beyond the joint. In a smaller place like Little Sandhurst, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why book with us
- Homes, businesses and hotels
- You choose the colour before work begins
- A choice of colours where the product allows
- Over 20 years’ experience
See what affects the cost and customer reviews.
How it works
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes a few hours for a handful of joints, longer for a whole elevation, including the tidy-up. A visit to Little Sandhurst is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- 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.
How to prepare
- Mention if the joints have been sealed before
- Mention any tricky access
- Tell us if parking is tricky
Ask for a quote
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Related advice
What affects the cost of external mastic
You’ll get a clear quote before work begins. It takes into account:
- The old material and how stubborn it is
- Whether there’s mould to deal with
- Working hours on commercial sites
- How many rooms, windows or areas are involved
Doing several joints on one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- If it’s domestic, commercial or a hotel
- If someone has resealed it before
- The problem you’ve noticed
- Where the job is, and your postcode
If you are in Little Sandhurst and need external mastic, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
When it isn’t the sealant
Before you book, it’s worth knowing the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly.
Where we work in Little Sandhurst
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Copings & trims
What we’re called out for in Little Sandhurst
Using the wrong sealant is another common reason. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
Look out for these signs:
- Joints where the bead has come unstuck
- Rigid filler in a joint that should flex
- Leaking joints around cladding and façade panels
- Cracked joints where brick meets render or frames
Rented homes near Sandhurst station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Before you book anyone
- How hidden problems are handled
- Is the old sealant removed completely?
- How the joint is cleaned and prepared
- What the cure time is