Hampshire · England
Sand mastic for sash & case windows in Darby Green, Hampshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Darby Green. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic worn away on windows facing the weather
- Old sand mastic that has cracked, crumbled or fallen out
- Silicone on a period window that looks wrong
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Sand mastic in Darby Green
Silicone on a period window often looks wrong and isn’t always the right material. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. If you’re dealing with crumbling sand mastic round a window and silicone on a period window that looks wrong, we can help, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Darby Green is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Darby Green (GU17, GU46)
- Region
- Hampshire
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
When it isn’t the sealant
We’d rather tell you now than do work that won’t last, so these are the limits:
- Masonry that needs repairing
- Decayed frames that need repair
- Putty and glazing repairs
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before you book.
What we seal
- Tenement windows
- Brick reveals
- Timber door frames
- Stone surrounds
- Sash and case windows
- Period & listed homes
Landlords, agents and businesses in Darby Green
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
How the visit works
The work is kept neat and contained to the joints we are treating, so you can get on with your day. The job normally takes anything from a few hours to a full day, depending on how many windows, and we tell you how long to leave it before we go. Somewhere like Darby Green needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Move anything stored near the joints
- For indoor joints, keep the area dry beforehand if you can
- Let us know if you’ve seen damp or leaks
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Advice
Darby Green homes and the weather
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.
For landlords with property near Sandhurst station, any sash windows need sound mastic to keep draughts and rain out. For site and facilities teams at buildings such as Potley Hill Primary School, the mastic around its windows and doors needs looking after like any other building’s. Homes close to St Barnabas Church include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in.
Darby Green is about 1 mile east of Yateley, in Hampshire. Across the GU17 area, we cover sand mastic for homes and businesses. Darby Green is one of 683 places in Hampshire we cover for sand mastic. You can also see our page for Reading, about 11 miles away.
Work in GU17 and GU46 works the same way as everywhere else we cover. If you need sand mastic at a property on Green Lane, Stroud Lane and Reading Road or anywhere close by, our applicators can take on the job. If you’re just outside Darby Green, we cover Minley (1 mile south-west), Yateley (1 mile west), Little Sandhurst (2 miles north), Eversley Cross (3 miles west) and Eversley Centre (3 miles west). We also work in nearby towns such as Basingstoke (14 miles west), Farnborough (3 miles south-east), Fleet (4 miles south), Aldershot (6 miles south), Alton (15 miles south-west) and Tadley (15 miles west).
Near you in Darby Green
Locally, jobs take us to homes and businesses close to Cricketers pub, Royal Military Academy Library and Frogmore Community College. Darby Green’s nearest station is Sandhurst station, about 1 mile north of the centre. A little further out are Hart Shopping Centre (3.9 miles south-west) and Frimley Park Hospital (2.9 miles east). Green spaces nearby include Wildmoor Heath and Horseshoe Lake.
Quotes for sand mastic in Darby Green
For a quick quote, just ask. What matters most is:
- Whether there’s mould to deal with
- How much old sealant there is and how hard it is to remove
- The number and length of the joints
- Any working-time requirements on site
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will explain what it covers.
What we need to know
Before you ask for a quote, have a think about:
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
- Pictures of the joints, sent by email
Getting a quote is simple: let us know what needs doing and where. Photos by email help us understand the job.
Darby Green: your questions answered
Do you work for landlords with property near Sandhurst station?
Yes. We work for letting agents and landlords as well as householders. You can call 0345 464 0079 or email us with the details for a clear quote.
Do you cover smaller places like Darby Green?
Yes, Darby Green is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
What guarantee comes with the work?
All our work has a 12-month guarantee, and we’re fully insured.
How long does the job take?
It depends on the size of the job, but as a guide it takes a few hours per window, depending on the condition of the joints. We’ll tell you when we quote.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
What should I tell you?
A short description and the location. If we need more, we will ask.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done.
Nearby places to Darby Green
What else we do in Darby Green
Why deal with it now?
Before painting the windows, it pays to renew the mastic. Paint over cracked mastic won’t stop the gaps and traditional guidance is to leave the new mastic unpainted. Around Darby Green, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
What you get with us
- 20+ years of sealant experience
- Anti-fungal silicone where joints get wet
- 180+ five-star Google reviews
- We are fully insured
Aftercare tips
Good habits help new joints last longer. Our tips:
- Avoid patching sand mastic with silicone
- Take care around the mastic when scraping paint
- Sort the mastic before the decorators arrive
- Ask the planning authority about consent for listed or conservation-area homes
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.