Windsor and Maidenhead · England
Sand Mastic in Boyn Hill
Sand mastic for Boyn Hill, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Silicone on a period window that looks wrong
- Gaps between timber frames and stone or brick
- Cracked mastic round a front door frame
Sand mastic in Boyn Hill, done properly
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. We work on brick reveals, tenement windows and sash and case windows, and people most often call us about weathered mastic on the most exposed windows and window mastic to renew ahead of painting.
In smaller places like Boyn Hill, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
Whatever the size of the job, it’s backed by our 12-month guarantee in Boyn Hill and across Windsor and Maidenhead.
- Place
- Boyn Hill (SL6)
- Wider area
- Windsor and Maidenhead
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for sand mastic
For a quick quote, just ask. The main things that affect it are:
- The size of the job
- Whether the work is at height
- How many rooms, windows or areas are involved
- How much old sealant there is and how hard it is to remove
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
You do not need to know the technical terms. It helps if you can tell us:
- Roughly how big the job is
- The type of property
- Photos by email, if that is easy
- Where the property is
Need a quote? Please call 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
What the job involves on each surface
Period and listed homes
Materials matter on listed and conservation-area homes. Like-for-like sand mastic is normally favoured.
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Towns and villages near Boyn Hill
Also in Boyn Hill
Questions from Boyn Hill
I let a flat near Maidenhead station. Can you help?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
Do you cover Boyn Hill for sand mastic?
Yes, Boyn Hill is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing.
Can you replace silicone on a period window with sand mastic?
In most cases. The silicone is cut out and the joint cleaned before the sand mastic goes in.
Where do you work from?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Can I add another job to the visit?
Of course. Combining jobs makes good use of the visit.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Are you fully insured?
Yes. We’re fully insured, and we have been doing sealant work for more than 20 years.
How the visit works
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours per window, depending on the condition of the joints. A visit to Boyn Hill 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.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Move anything stored near the joints
- Mention any sign-in or site rules at work premises
Ask for a quote
Asking for a quote is easy: tell us what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we’ll take it from there.
Read more
When something else is needed
We’d rather tell you now than do work that will not last, so these are the limits:
- Cracked or broken glass
- Crumbling stone or brickwork round the window
- Decisions on consent for listed homes
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Stone surrounds
- Period & listed homes
- Brick reveals
- Sash and case windows
- Tenement windows
- Timber door frames
Landlords, agents and businesses in Boyn Hill
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Frames and glazing around Boyn Hill
The South East is one of 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 Dorney Court (about 3.1 miles east) nearby, there’s older building stock in the area around Boyn Hill as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For landlords with property near Maidenhead station, cracked sand mastic around sash windows lets in the draughts tenants complain about. For an older house near a landmark such as All Saints' Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Boyn Hill is about 1 mile south-west of Maidenhead, in Windsor and Maidenhead. If you need sand mastic in Boyn Hill, please ring 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover Windsor and Maidenhead, Boyn Hill included. We cover 57 towns and villages across Windsor and Maidenhead, from the larger towns to small villages. There’s also a page for Reading, roughly 11 miles from Boyn Hill.
Every address in SL6 is within our area for sand mastic. If you need sand mastic at a property on Lock Lane, Ross Road and Curls Road or anywhere close by, our applicators can take on the job. Boyn Hill sits on or near the A404(M). Close by, we work in Cox Green (1 mile south-west), Maidenhead (1 mile north-east), Bray Wick (1 mile south-east), Woolley Green (1 mile west) and Pinkneys Green (2 miles north-west). We also work in nearby towns such as Windsor (5 miles south-east), North Ascot (7 miles south), Cookham (3 miles north), Dedworth (5 miles south-east), Broomhall (9 miles south-east) and South Ascot (8 miles south). Being one of Windsor and Maidenhead’s larger places, Boyn Hill has homes, rented property and businesses of every kind.
Local landmarks in Boyn Hill
We work in homes and buildings around Ockwells Park, Altwood CofE Secondary School and The Crown pub and the streets around them. The closest station to Boyn Hill is Maidenhead station, roughly 1 mile north-east. A little further out are The Reitlinger Bequest Museum (1.8 miles north-east) and St Mark's Hospital (1 mile north). For a walk, there’s Weycock Hill and The Gullet Local Nature Reserve.
How to look after the new joints
Aftercare is simple:
- Get any rot dealt with first
- Make sure water runs off the sill
- Find out about consent before window work on a listed home
- Do not run silicone over sand mastic
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at rather than patching it.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
When to call us in Boyn Hill
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
If you can see any of these, it’s time to have the joints looked at:
- Gaps between timber frames and stone or brick
- Failed mastic on an exposed elevation
- Cement or filler used on old window joints that has cracked
- Crumbling sand mastic round a window
If you look after a building such as Larchfield Primary and Nursery School, its window and door frames need their mastic kept sound, just like a home’s.
Before you book anyone
- What happens if they find a problem under the old sealant
- How much experience the applicator has
- What preparation is included
- Whether the sealant suits the joint