Hampshire · England
Sand mastic for sash & case windows in Up Somborne, Hampshire
Our applicators work in Up Somborne on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly.
- Draughty sash windows at the surround
- Cement or filler used on old window joints that has cracked
- Window mastic to renew ahead of painting
How we handle sand mastic in Up Somborne
We renew sand mastic around sash windows and doors set in stone or brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. If you have mastic worn away on windows facing the weather and patchy fillers round a sash window, we can put it right.
Outdoor sealant needs dry, clean surfaces, so work on frames around Up Somborne is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Up Somborne (SO20)
- Region
- Hampshire
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Signs you need sand mastic in Up Somborne
Shallow joints are a common cause. A thin layer doesn’t hold well, which is why we pack deep voids first and get the depth right.
Most people get in touch when they notice one of these:
- Modern sealant on a period surround
- Cracked mastic round a front door frame
- Failed mastic on an exposed elevation
- Mastic dropping out of the joint
Homes close to All Saints Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- When the joint can take water or movement
- What preparation is included
- Whether the sealant suits the joint
- Who turns up on the day
Different surfaces, different methods
Period and listed homes
Materials matter on listed and conservation-area homes. Sand mastic is often the preferred finish.
Stone surrounds
The stone is treated with care while raking out the old mastic.
Landlord and commercial work in Up Somborne
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Housing providers, facilities teams and property managers book us too in Up Somborne and across Hampshire. We can quote a run of properties together, and we’re fully insured for the work.
DIY versus a professional finish
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
If you are 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 does not work out, we can still put it right.
Up Somborne questions
Do you cover Up Somborne for sand mastic?
Yes. We work across London and the South East, and Up Somborne is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear price.
Is sand mastic in Up Somborne guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Is it possible to paint over sand mastic?
Traditional guidance is not to paint over sand mastic. If you’re redecorating the window, ask us first and we’ll talk you through it.
Where are you based?
Our base is Crawley. We work across South East England, London and Scotland.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or email us.
Can you match the sealant colour?
We will suggest a colour to suit the surroundings, from white and clear to greys and other shades. The choice depends on the product the joint needs.
What do you put in the joint?
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.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint.
Why act early in Up Somborne
Not every filler suits an old window surround. Sand mastic matches what was there and that can be important for listed homes. Older cottages and farmhouses around Up Somborne can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why book with us
- Fully insured
- Quality sealants from Arbo and Everbuild
- ARBOMaster approved applicator
- 4.9 on Google from 180+ five-star reviews
Read how sealant jobs are priced and customer reviews.
What we do, step by step
At the end, we look at the finished work together and tell you how long to leave it. The visit itself normally takes anything from a few hours to a full day, depending on how many windows, depending on the size of the job. Somewhere as small as Up Somborne, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
- Clear the area around the work
Get 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 photos by email if you can.
Related advice
Up Somborne homes and the weather
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In and around Up Somborne, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Up Somborne is about 5 miles north-west of Winchester, in Hampshire. Across the SO20 area, we cover sand mastic for homes and businesses. Up Somborne is one of 683 towns and villages in Hampshire where we work for sand mastic. Southampton is on our list too, about 12 miles from Up Somborne.
Postcode districts we cover here for sand mastic: SO20. We cover properties on Court Lane and Up Somborne Lane and the roads around them. Neighbouring places we cover for sand mastic include Little Somborne (1 mile west), Ashley (1 mile south-west), King's Somborne (2 miles south-west), Lower Slackstead (4 miles south) and Braishfield (5 miles south). Larger places within reach include Winchester (5 miles south-east), Eastleigh (9 miles south-east), Andover (9 miles north), Totton (12 miles south), Chandler's Ford (8 miles south) and Hedge End (13 miles south-east).
Local landmarks in Up Somborne
Other landmarks nearby include Royal Hampshire County Hospital (4.9 miles south-east).
Nearby places to Up Somborne
Other services in Up Somborne
Honest limits
To be straight with you, some problems need a different trade:
- Whether work needs listed building consent
- Crumbling stone or brickwork round the window
- Timber that has rotted
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Brick reveals
- Period & listed homes
- Sash and case windows
- Tenement windows
- Stone surrounds
- Timber door frames