Hampshire · England
Sand Mastic in Netley Marsh
Professional sand mastic in and around Netley Marsh, with old sealant always removed completely and a 12-month guarantee.
- Gaps round a timber door in stone or brick
- Silicone on a period window that looks wrong
- Mastic worn away on windows facing the weather
Sand mastic in Netley Marsh, done properly
We renew sand mastic around sash windows and doors in stone and brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. Common call-outs are for weathered mastic on the most exposed windows and patchy fillers round a sash window, across brick reveals, timber door frames and sash and case windows.
Around Netley Marsh, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Whatever the size of the job, you get the same one-year guarantee in Netley Marsh and across Hampshire.
- Location
- Netley Marsh (SO40)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When it is not the sealant
Before you book, it’s worth knowing the limits:
- Whether work needs listed building consent
- Damaged stone surrounds
- Putty and glazing repairs
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly before you book.
Where we work in Netley Marsh
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Timber door frames
- Tenement windows
- Brick reveals
Other services in Netley Marsh
Windows and doors in Netley Marsh
Netley Marsh is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. 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.
If you let a flat or house near Ashurst New Forest station, cracked sand mastic around sash windows lets in the draughts tenants complain about. For site and facilities teams at buildings such as Netley Marsh Church of England Infant School, larger buildings have plenty of frames, and the mastic around each one ages. In the older streets around Church of St Matthew, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Netley Marsh is about 1 mile west of Totton, in Hampshire. Homes, rented property, offices and hotels in Netley Marsh is covered for sand mastic. The work is guaranteed for a year. Our area takes in 683 places across Hampshire, from the larger towns to small villages. We also work in Southampton, around 6 miles away.
Work in SO40 is quoted and booked the same way as anywhere else. If you need sand mastic at a property on Ringwood Road and Woodlands Road or anywhere close by, our applicators can take on the job. If you’re just outside Netley Marsh, we cover Ashurst Bridge (1 mile south-east), Totton (1 mile east), Woodlands (1 mile south), Winsor (1 mile north-west) and Bartley (1 mile west). Larger places within reach include Winchester (14 miles north-east), Eastleigh (9 miles north-east), Fareham (15 miles east), Chandler's Ford (8 miles north-east), Hedge End (10 miles east) and Lymington (11 miles south).
What’s near Netley Marsh
In Netley Marsh, that means homes and buildings near Hounsdown School and The White Horse pub and the streets around them. The nearest railway station is Ashurst New Forest station, roughly 1.8 miles south of the centre. Other landmarks nearby include National Dairy Museum (1.8 miles south-east) and Tatchbury Mount Hospital (1.1 miles north). Not far away are Testwood Lakes.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Avoid heavy scraping on the mastic joint
- Clear gutters so water does not pour onto the windows
- Renew mastic before redecorating the windows
- Ask the planning authority about consent for listed or conservation-area homes
Leave the new mastic unpainted, as traditional guidance advises. Ask us before any decorating around it.
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.
Quotes for sand mastic in Netley Marsh
Your quote is based on your job. We look at:
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- How many areas need sealing
- The product the joint needs
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first and agree the price before starting.
What we need to know
When you call or email, it’s useful to know:
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- Photos by email, if that’s easy
- Access, such as stairs, a lift or height
We quote each job on its own. Just ring 0345 464 0079 or send us an email with the details.
What happens on the day
Before we leave, we go over the finished joints with you. The visit itself usually takes anything from a few hours to a full day, depending on how many windows, depending on the amount of work. In a small place like Netley Marsh, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Mention any tricky access
- Move anything stored near the joints
- Tell us about any water getting in
Get a quote
If you are in Netley Marsh and need sand mastic, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Related advice
Surface by surface
Brick reveals
An open joint at a brick reveal lets weather in. Renewing the mastic closes it.
Tenement and terrace windows
Windows above ground floor need the right access. Let us know the floor and we’ll confirm access.
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams in Netley Marsh and across Hampshire. Several sites can go on one quote.
We work for letting agents and landlords as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
Common questions in Netley Marsh
Do you work for landlords with property near Ashurst New Forest station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or email us with the details for a clear quote.
Do you cover smaller places like Netley Marsh?
Yes, we do. 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.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and we’ll quote it together.
Can you match the sealant colour?
Yes. White, clear and grey are common, and other colours are available, and we agree the colour with you before work begins.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we are using and why.
Will there be a smell?
There can be a smell while the sealant cures, which fades as it sets. Opening a window helps.
Should I use sand mastic or silicone?
We will talk it through with you. Period homes often look best with sand mastic and newer frames suit modern sealant.