Slough · England
Middlegreen Sand Mastic
Sand mastic across Middlegreen and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Patchy fillers round a sash window
- Failed mastic on an exposed elevation
- Gaps round a timber door in stone or brick
Sand mastic in Middlegreen, done properly
Traditional burnt sand mastic that sits naturally against stone and brick. It’s a good fit for period properties where a modern sealant bead would stand out. We work on sash and case windows, tenement windows and timber door frames, and people most often call us about draughts and rain around sash boxes and cracked mastic round a front door frame.
Mastic can only go onto a dry, clean joint, so window work in Middlegreen is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Your job is guaranteed for a year, as with all our work.
- Location
- Middlegreen (SL3)
- Region
- Slough
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How it works
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes a few hours per window, depending on the condition of the joints, depending on the size of the job. In a small place like Middlegreen, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- The finish is dressed neatly.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Clear the area around the work
- Mention any sign-in or site rules at work premises
Get a quote
To get a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You will have a clear quote before we start.
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Towns and villages near Middlegreen
More services for Middlegreen
Do you need sand mastic in Middlegreen?
Timber frames move with the seasons. That movement opens up the mastic joint over time.
Common reasons people contact us include:
- Draughts and rain around sash boxes
- Mastic that needs renewing before redecorating
- Gaps round a timber door in stone or brick
- Gaps between timber frames and stone or brick
For landlords with property near Langley station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Questions to ask before booking
- How much experience the applicator has
- How long the guarantee is
- What the quote includes, VAT included or not
- How the joint is cleaned and prepared
FAQs for Middlegreen
Is Middlegreen within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you do sand mastic in Middlegreen?
Yes, Middlegreen is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing.
Do you guarantee sand mastic work?
Our 12-month guarantee covers every job.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or send us an email.
Do you work for hotels and businesses?
Yes, regularly. We can plan bigger jobs in stages.
Where are you based?
Our base is Crawley. We work across South East England, London and Scotland.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can landlords and businesses book you?
Yes, we do. We work in homes, commercial premises and hotels.
Different surfaces, different methods
Tenement and terrace windows
Upper-floor windows need access planning. Let us know the floor and we’ll confirm access.
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
Middlegreen homes and the weather
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Windsor Castle (about 2.8 miles south-west) nearby, there’s older building stock in the area around Middlegreen 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.
If you look after a building such as The Langley Academy Primary, the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as St Mary the Virgin Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Middlegreen is about 2 miles east of Slough, in Slough. We carry out sand mastic for homeowners, landlords and businesses in Middlegreen, as part of our work across Slough. Middlegreen is one of 31 places in Slough we cover. For nearby work, see our Reading page, about 19 miles away.
We work across SL3 for sand mastic. That includes homes and businesses on Laurel Avenue, St Mary's Road and Maryside and the roads around them. We also cover Langley (1 mile south-east), George Green (1 mile north), Shreding Green (1 mile north-east), Upton (2 miles west) and Wexham Court (2 miles north-west). Further out, we also cover Cippenham (4 miles west), Britwell (3 miles north-west), Burnham (5 miles west), Stoke Poges (3 miles north-west), Huntercombe (4 miles west) and Farnham Common (4 miles north-west).
Near you in Middlegreen
In Middlegreen, that means homes and buildings near Upton Court Grammar School, The Chestnuts pub and Langley Academy, among other places. The nearest railway station is Langley station, about 0.7 miles east. Other landmarks nearby include Windsor Castle (2.8 miles south-west) and Museum of Eton Life (2.6 miles south-west). Green spaces nearby include Stoke Common.
What affects the cost of sand mastic
Every job gets its own quote. This is what makes a difference:
- The number of rooms or windows
- Mould in or behind the old joints
- Whether the work is at height
- The product the joint needs
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
What we need to know
What to tell us when you ask for a quote:
- How many joints, rooms or windows are involved
- What’s wrong with the joints now
- Where the property is
- How we’d reach the joints
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Sort the mastic before the decorators arrive
- Get any rot dealt with first
- Don’t paint over the new mastic
- Look over the window mastic once a year
Leave the new mastic alone while it firms up. It skins over quickly, but takes longer to harden fully.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
When it is not the sealant
We will not take on work that won’t last, so these are the limits:
- Broken panes
- Decayed frames that need repair
- Damaged stone surrounds
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
Joints and surfaces we work on
- Stone surrounds
- Timber door frames
- Sash and case windows
- Period & listed homes
- Brick reveals
- Tenement windows