Hampshire · England
Sand Mastic in Pennington
Sand mastic in Pennington from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Old sand mastic that has cracked, crumbled or fallen out
- Wind and rain getting in round a sash window
- Gaps between timber frames and stone or brick
Sand mastic in Pennington, done properly
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted and we’ll advise if you are redecorating. We’re often asked to deal with modern sealant on a period surround and tired mastic found when preparing windows for paint, across timber door frames, stone surrounds and period & listed homes.
Around Pennington, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows.
There’s a 12-month guarantee on every job, large or small.
- Place
- Pennington (SO41)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Don’t run silicone over sand mastic
- Find out about consent before window work on a listed home
- Clear gutters so water does not pour onto the windows
- Renew mastic before redecorating the windows
Avoid painting over the new mastic, as traditional guidance advises. Ask us before any decorating around it.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
Windows and doors in Pennington
Pennington is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on the mastic around older windows and doors, especially on the side facing the sea. 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 an older house near a landmark such as Church of St Mark, frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you look after a building such as Priestlands School, larger buildings have plenty of frames, and the mastic around each one ages.
Pennington is about 1 mile south-west of Lymington, in Hampshire. Anywhere in SO41, our applicators can take on sand mastic. Our area takes in 683 places across Hampshire, large and small. For nearby work, see our Southampton page (14 miles or so).
Work in SO41 is quoted and booked the same way as anywhere else. Whether your property is on Mead Road, Pound Road and Elm Avenue or a nearby road, we can help. Close by, we work in Lymington (1 mile north-east), Lower Pennington (1 mile south), Walhampton (1 mile north-east), Everton (1 mile west) and Lymore (2 miles south-west). Further out, we also cover Totton (12 miles north), Hythe (10 miles north-east), New Milton (5 miles west), Ringwood (12 miles north-west), Locks Heath (15 miles north-east) and Warsash (14 miles north-east).
Around Pennington
Typical jobs here are in homes near Pennington Infant School and White Hart Inn and the streets around them. Pennington’s nearest station is Lymington Town station, roughly 1.2 miles north-east of the centre. Nearby you’ll also find St Barbe Museum and Art Gallery (0.9 miles north-east) and Yarmouth Castle (3.9 miles south-east). For a walk, there’s Lymington and Keyhaven Marshes Nature Reserve.
Surface by surface
Brick reveals
An open joint at a brick reveal lets weather in. Renewing the mastic closes it.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
Also near Pennington
Other services in Pennington
The process
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to a full day, depending on how many windows. In a smaller place like Pennington, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- Let us know about parking restrictions
- Mention any leaks or damp you’ve noticed
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or drop us an email.
Related advice
Why it’s worth doing now in Pennington
Before painting the windows, it pays to renew the mastic. Paint over cracked mastic won’t stop the gaps, and the new mastic is traditionally left unpainted. In a smaller place like Pennington, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why choose Mr Mastic in Pennington
- Homes, businesses and hotels
- Trusted Arbo and Everbuild sealants
- One-year guarantee on every job
- Approved under the ARBOMaster scheme
Take a look at our cost guide or our reviews.
Your questions about sand mastic in Pennington
Does the coastal weather in Pennington affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Will you come out to Pennington?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you do several jobs on one visit?
Yes, we can. More than one area can go on one quote.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator.
I’m a tenant. Can you help?
We’re happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
What exactly is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It combines sand with a linseed-oil-based binder.
What do you put in the joint?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Are you insured?
Yes. Full insurance covers our work.
What we’re called out for in Pennington
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows.
The problems people generally mention when they call include:
- Open joints round the window box
- Patchy fillers round a sash window
- Mastic worn away on windows facing the weather
- Gaps round a timber door in stone or brick
Letting a property close to Lymington Town station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Comparing quotes
- How the colour is chosen
- Whether they seal over old material or remove it
- What the quote includes, VAT included or not
- What happens if the job turns out different
How we quote for sand mastic
For a quick quote, just ask. The main things that affect it are:
- How much old sealant there is and how hard it is to remove
- The number of rooms or windows
- The size of the job
- The type of sealant required
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Helping us quote
To make quoting easier, please include:
- The type of property
- Pictures of the joints, sent by email
- The problem you’ve noticed
- Where the job is, and your postcode
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or email us.