Windsor and Maidenhead · England
Sand Mastic in White Waltham
Sand mastic in White Waltham from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cement or filler used on old window joints that has cracked
- Open joints round the window box
- Tired mastic found when preparing windows for paint
How it works
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to a full day, depending on how many windows and we leave things clean and tidy. Somewhere like White Waltham needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Clear the area around the work
- Mention any parking rules near the property
Getting a quote
We do not publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or send us an email.
Advice
About our sand mastic in White Waltham
Our applicators renew the sand mastic around sash and case windows and doors set in stone or brick. The old mastic is raked out, and new mastic is applied and shaped by hand. We work on stone surrounds, period & listed homes and tenement windows, and common reasons people get in touch are a silicone bead on a sash window that spoils the look and window mastic to renew ahead of painting.
Mastic can only go onto a dry, clean joint, so window work in White Waltham is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Big or small, you get the same 12-month guarantee.
- Location
- White Waltham (SL6)
- Region
- Windsor and Maidenhead
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in White Waltham
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote, and we are fully insured.
In hotels, rooms out of use cost money, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Frames and glazing around White Waltham
With historic houses such as Dorney Court (about 4.6 miles east) nearby, there’s older building stock in the area around White Waltham as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as White Waltham CofE Academy, its window and door frames need their mastic kept sound, just like a home’s. If you let a flat or house near Maidenhead station, any sash windows need sound mastic to keep draughts and rain out.
White Waltham is about 3 miles south-west of Maidenhead, in Windsor and Maidenhead. If you need sand mastic in White Waltham, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We cover Windsor and Maidenhead from our Crawley base. Across Windsor and Maidenhead, we cover 57 places, and White Waltham is one of them. For nearby work, see our Reading page.
Every address in SL6 is within our area for sand mastic. Whether your property is on Waltham Road, Church View and Innings Lane or a nearby road, we can help. If you are just outside White Waltham, we cover Shottesbrooke (1 mile south-west), Littlefield Green (1 mile south-east), Paley Street (1 mile south-east), Braywoodside (2 miles south-east) and Stud Green (2 miles east). We also work in nearby towns such as Maidenhead (3 miles north-east), Windsor (6 miles east), North Ascot (6 miles south-east), Cookham (5 miles north), Furze Platt (3 miles north-east) and Dedworth (5 miles east).
What’s near White Waltham
Around White Waltham, our work takes us to homes and buildings near Manor Green School, Ockwells Park and Cox Green School, among other places. The closest station to White Waltham is Maidenhead station, roughly 2.9 miles north-east of the centre. Nearby you’ll also find St Mark's Hospital (2.6 miles north-east) and The Reitlinger Bequest Museum (3.7 miles north-east). Open spaces near White Waltham include Taplow Lake and Weycock Hill.
Do you need sand mastic in White Waltham?
Age is the main cause. Even well-laid mastic needs renewing in time, depending on exposure and upkeep.
The problems people generally mention when they call include:
- Failed mastic on an exposed elevation
- Window mastic to renew ahead of painting
- Old sand mastic that has cracked, crumbled or fallen out
- Wind and rain getting in round a sash window
In the older streets around Church of St Mary, the joint between an old wall and a newer frame is generally the first place rain gets in.
Comparing quotes
- Is the old sealant removed completely?
- What preparation is included
- Which sealant they’ll use, and why
- Who turns up on the day
When something else is needed
To be straight with you, there are a few things sealant will not fix:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Damaged stone surrounds
- Broken panes
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Period & listed homes
- Tenement windows
- Sash and case windows
- Timber door frames
- Stone surrounds
- Brick reveals
Places near White Waltham
More services for White Waltham
Common questions in White Waltham
Will you come out to White Waltham?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you cover White Waltham for sand mastic?
Yes. Our work covers London and the South East, and White Waltham is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
What does sand mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Can I add another job to the visit?
Yes. More than one area can go on one quote.
When will the new mastic be hard?
It takes a while. The skin forms first, and the full set comes later, and we will tell you what to expect.
Where are you based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Why deal with it now?
Replacing sash windows is a big decision for a period home, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. In a small place like White Waltham, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why us?
- Old sealant always removed completely
- Sanitary silicone with an anti-fungal additive in wet areas
- We are fully insured
- Rated 4.9 stars on Google
Read what affects the cost or our reviews.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Look over the window mastic once a year
- Renew mastic before redecorating the windows
- Clear gutters so water does not pour onto the windows
- Do not paint over the new mastic
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber and timber that stays wet can rot.