Windsor and Maidenhead · England
External & façade joints in Cookham Dean, Windsor and Maidenhead
Movement joints in Cookham Dean need attention? We cut out the old, prepare the joints and apply the right sealant.
- Joints pointed up with cement by mistake
- Panel joints letting water in
- Plants rooting in failed movement joints
External mastic in Cookham Dean, done properly
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two. Common call-outs are for sealant pulling away from one side of the joint and moss and dirt in joints with no sealant left, on concrete & block, façade panels and render & cladding joints.
Older homes in small places like Cookham Dean may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
You’re covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Where
- Cookham Dean (SL6)
- Region
- Windsor and Maidenhead
- Cover
- One year on every job
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Landlords, agents and businesses in Cookham Dean
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
Housing providers, facilities teams and property managers book us too in Cookham Dean and across Windsor and Maidenhead. Several sites can go on one quote, and we’re fully insured.
What we cannot put right
A few problems are outside what sealant work can do:
- Cracks in the bricks or render themselves, away from the joints
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Render that’s blown, hollow or coming away
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Joints between brick and frames
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Copings & trims
- Concrete & block
Keeping the joints in good condition
After the cure time, these simple habits help:
- Avoid pressure-washing directly into sealant joints
- Clear growth from the base of walls and joints
- Look over the joints every year, ideally after winter
- Ask before painting over external sealant
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years.
Cookham Dean buildings and the weather
Historic houses like Cliveden (about 2.5 miles east) are a reminder that the area around Cookham Dean has older buildings as well as new. In older buildings, 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Cookham station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. For site and facilities teams at buildings such as Cookham Dean CofE Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Cookham Dean is about 2 miles south-east of Marlow, in Windsor and Maidenhead. Jobs in Cookham Dean get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Cookham Dean is one of 57 towns and villages in Windsor and Maidenhead where we work. We also work in Reading, about 12 miles from Cookham Dean.
Every address in SL6 is covered for external mastic, from the main roads to the quietest streets. You will find streets such as Kings Lane, Popes Lane and Hills Lane. Close by, we work in Cookham (1 mile east), Bisham (1 mile west), Furze Platt (2 miles south), Marlow (2 miles north-west) and Temple (2 miles west). Further out, we also cover Maidenhead (3 miles south), Windsor (7 miles south-east), Boyn Hill (3 miles south), North Ascot (10 miles south), Dedworth (7 miles south-east) and Broomhall (12 miles south-east).
What’s near Cookham Dean
Locally, jobs take us to homes and businesses close to Jolly Farmer pub and Furze Platt Senior School. For rail, the closest station is Cookham station, roughly 1 mile east of the centre. A little further out are Marlow Community Hospital (1.6 miles north-west) and Marlow Museum (1.5 miles north-west). Open spaces near Cookham Dean include Taplow Lake and Carpenter's Wood.
How the job changes by surface
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it or an approved alternative. Tell us what the building has when you get in touch.
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. We prime where the sealant needs it before sealing.
How the visit works
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours to a few days, depending on the length of joint and the access. In a small place like Cookham Dean, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Move anything stored near the joints
- Tell us about any water getting in
How to get a quote
We do not publish a price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.
Advice
Places near Cookham Dean
More services for Cookham Dean
Questions from Cookham Dean
I let a flat near Cookham station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Is Cookham Dean in your area for external mastic?
Yes, Cookham Dean is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
Is the work guaranteed?
Yes. All our work carries a one-year guarantee.
Is it OK to seal over old sealant?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
Do you seal joints where cladding meets other materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so the joint between them must be flexible. The sealant is matched to both sides.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area.
Can you quote for more than one area?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
How long does external mastic last?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Every job carries our one-year guarantee.
Signs you need external mastic in Cookham Dean
If plants are growing out of a joint, the sealant has usually failed or was never there. Dirt and roots then trap moisture in the joint.
Look out for any of the following:
- Plants rooting in failed movement joints
- Joints with sealant missing in places
- Rain getting behind render or cladding at a joint
- Old sealant gone brittle and cracked
In the older streets around Church of St John the Baptist, an extension built onto an older house moves differently, and the joint between them takes the strain.
What to look for in a quote
- Whether they seal over old material or remove it
- Who turns up on the day
- Is VAT in the price?
- When the joint can take water or movement
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and doesn’t last, so it pays to do it properly once. In a small place like Cookham Dean, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What you get with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Domestic, commercial and hotel work
- Old sealant always removed completely
- We leave the area clean and tidy
See what affects the cost or our reviews.