Windsor and Maidenhead · England
Oakley Green External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Oakley Green, backed by a 12-month guarantee. Ask us for a quote.
- Moss and dirt in joints with no sealant left
- Rigid filler in a joint that should flex
- Panel joints letting water in
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
How we handle external mastic in Oakley Green
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing, and we don’t skip that step. We work on copings & trims, brickwork movement joints and render & cladding joints, and people most often call us about rigid filler in a joint that should flex and panel joints letting water in.
Older homes in small places like Oakley Green may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in.
All our work is covered by our 12-month guarantee.
- Where
- Oakley Green (SL4)
- Wider area
- Windsor and Maidenhead
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
To keep the joints looking good and working properly:
- Act on the first splits you see
- Look over the joints every year, ideally after winter
- Keep movement joints as flexible joints, not mortar
- Check the sealant is paintable before painting near it
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
Landlords, agents and businesses in Oakley Green
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
External mastic in Oakley Green: local notes
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as St Leonard's Hill (about 1 mile south-east) nearby, there’s older building stock in the area around Oakley Green as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
If you let a flat or house near Windsor & Eton Central station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. Homes close to All Saints include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Oakley Green is about 1 mile west of Windsor, in Windsor and Maidenhead. Our applicators cover external mastic for homes and businesses in Oakley Green and the surrounding area, as part of our work across Windsor and Maidenhead. Across Windsor and Maidenhead, we cover 57 places, Oakley Green among them. For nearby work, see our Reading page (14 miles or so).
Here we cover the SL4 postcode area for external mastic. That includes homes and businesses on Bishops Farm Close, Dedworth Road and Oakley Green Road and the roads around them. Neighbouring places we cover for external mastic include Dedworth (1 mile east), Water Oakley (1 mile north-west), Boveney (1 mile north-east), Fifield (1 mile west) and Windsor (1 mile east). Larger places within reach include Maidenhead (4 miles north-west), Boyn Hill (4 miles north-west), North Ascot (4 miles south), Cookham (6 miles north-west), Furze Platt (5 miles north-west) and Broomhall (6 miles south).
Landmarks near Oakley Green
In Oakley Green, that means homes and buildings near The Greene Oak pub, Sutherland Grange and Windsor Girls' School. The closest station to Oakley Green is Windsor & Eton Central station, about 2.3 miles east of the centre. A little further out are Windsor Castle (2.6 miles east) and The History On Wheels Museum (2.1 miles north-east). Open spaces near Oakley Green include Taplow Lake and Bray Pit.
Surface by surface
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best in all weathers.
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
Quotes for external mastic in Oakley Green
The price is agreed before any work begins. It takes into account:
- How many rooms, windows or areas are involved
- Access and height
- When we can work, for business premises
- Any mould that needs treating
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
What we need to know
When you contact us, it’s useful to know:
- Access, such as stairs, a lift or height
- Where the property is
- How many joints, rooms or windows are involved
- A few photos by email, if you can
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work.
What we’re called out for in Oakley Green
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it cannot stretch and tears as soon as the joint widens.
Keep an eye out for any of the following:
- Brick movement joints where the sealant has split
- Old sealant gone brittle and cracked
- Failed seals between different materials
- Rain getting behind render or cladding at a joint
If you look after a building such as Alexander First 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
- Are they insured?
- Whether the sealant suits the joint
- How the surfaces are prepared before sealing
- Whether they seal over old material or remove it
Oakley Green questions
Is Oakley Green within the area you cover?
Yes. Oakley Green is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you do external mastic in Oakley Green?
Yes, Oakley Green is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Will the new joint stand out?
The sealant colour is picked to suit the wall so the joint blends in. Exterior sealants come in a good range of colours.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we will explain our choice.
How long does the job take?
As a guide, most jobs take anything from a few hours to several days, depending on the building. Bigger jobs take longer, and we’ll say how long yours will take.
Can you work on commercial sites?
Yes. We’ve worked for hotels, offices and other businesses.
What information do you need?
Only a few details: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or drop us an email.
Also in Oakley Green
How the visit works
Most of a good job is in the preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Oakley Green needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Plan for the work area to be out of bounds to pets and children
- For business premises, tell us about site rules or sign-in
Getting a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.