Windsor and Maidenhead · England
Brookside External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Brookside and across Windsor and Maidenhead. Fully insured, ARBOMaster approved and guaranteed for a year.
- Failed sealant between panels on a façade
- Rain getting behind render or cladding at a joint
- Sealant pulling away from one side of the joint
Different surfaces, different methods
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap.
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two.
About our external mastic in Brookside
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what access is needed. Common call-outs are for joints with sealant missing in places and rigid filler in a joint that should flex, on brickwork movement joints, joints between brick and frames and copings & trims.
External sealant needs dry, clean surfaces, so work around Brookside is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Each job carries a 12-month guarantee.
- Location
- Brookside (SL5, SL4)
- Wider area
- Windsor and Maidenhead
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
A little care helps the new joints last. Our advice:
- Leave the joints unpainted unless we’ve said otherwise
- Get split or bare joints resealed while the damage is small
- Wash walls gently around the sealant
- Fix overflowing gutters above sealed joints
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
Landlord and commercial work in Brookside
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Brookside buildings and the weather
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as St Leonard's Hill (about 3.2 miles north-east) nearby, there’s older building stock in the area around Brookside 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.
Managing a site like Papplewick School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Rented homes near Ascot station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Brookside is about 3 miles east of Wick Hill, in Windsor and Maidenhead. We carry out external mastic for homes and businesses in Brookside, as part of our work across Windsor and Maidenhead. 57 places in Windsor and Maidenhead are on our list, from the larger towns to small villages. Our Reading page covers work nearby.
Our applicators cover all of the SL5 and SL4 postcode area for external mastic. We cover properties on New Road, The Avenue and Coach Road and the roads around them. We also cover the places around Brookside: North Ascot (1 mile south-west), Plaistow Green (1 mile north), Woodside (1 mile north-east), Ascot (1 mile south-east) and Winkfield (1 mile north-west). Within a short drive, we also cover Maidenhead (7 miles north), Windsor (4 miles north-east), Boyn Hill (6 miles north-west), Cookham (9 miles north), Furze Platt (8 miles north) and Dedworth (4 miles north).
Around Brookside
Locally, jobs take us to homes and businesses close to Ascot Heath Church of England Junior School and Royal Hunt pub and the streets around them. For rail, the closest station is Ascot station, roughly 1.3 miles south of the centre. Other landmarks nearby include Heatherwood Hospital (1 mile south) and The Lexicon (3 miles west). The countryside around Brookside includes Virginia Water Lake.
Also near Brookside
What else we do in Brookside
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Adding movement joints to masonry that has none
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
Where we work in Brookside
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
- Façade panels
When to call us in Brookside
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
Look out for these signs:
- Joints with sealant missing in places
- Sealant pulling away from one side of the joint
- Weeds or debris growing in open joints
- Leaking joints around cladding and façade panels
For an older house near a landmark such as Chapel of St Mary and St John, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Questions to ask before booking
- What insurance they hold
- What the cure time is
- Whether VAT is included
- What preparation is included
How it works
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to several days, depending on the building. Somewhere like Brookside needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
- Let us know about stairs, lifts or work at height
Ask for a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
Advice
Why act early in Brookside
Resealing a run of joints in one go is usually better than patching one at a time. Joints of the same age tend to fail together. Where a wall is exposed, as many are in small places like Brookside, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why us?
- Sealant colour chosen to suit
- We agree the colour with you first
- Rated 4.9 stars on Google
- 20+ years of sealant experience
Read our cost guide and what customers say.
Common questions in Brookside
Is Brookside within the area you cover?
Yes, Brookside is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Ascot station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. We remove it all first.
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.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
Where is Mr Mastic based?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.