Hampshire · England
South Weirs Sand Mastic
Sand mastic in South Weirs from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Patchy fillers round a sash window
- Mastic dropping out of the joint
- Failed mastic on an exposed elevation
Sand mastic for homes and businesses in South Weirs
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. Common call-outs are for crumbling sand mastic round a window and draughts and rain around sash boxes, on period & listed homes, timber door frames and brick reveals.
Outdoor sealant needs dry, clean surfaces, so work on frames around South Weirs is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
All of our work is guaranteed for twelve months.
- Place
- South Weirs (SO42)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Do you need sand mastic in South Weirs?
Previous repairs in cement or silicone often trap water or crack away. They don’t suit the joint and we normally remove them.
Keep an eye out for any of the following:
- Mastic round period door frames that has failed
- Cement or filler used on old window joints that has cracked
- Mastic dropping out of the joint
- Open joints round the window box
Schools such as Brockenhurst Church of England Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- Which colour the sealant will be
- Whether they’re fully insured
- Who does the work, and how experienced they are
- How long to leave it before use
What happens if it’s left?
New mastic over crumbling mastic won’t hold. Raking out and preparing the joint gives it a sound base so the new mastic stays put. Where a wall is exposed, as many are in small places like South Weirs, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Why book with us
- We leave the area clean and tidy
- Full insurance on every job
- Sanitary silicone with an anti-fungal additive in wet areas
- 12-month guarantee on every job
When something else is needed
To be straight with you, there are a few things sealant won’t fix:
- Sash cords, weights and draught-proofing of the sashes
- Broken panes
- Timber that has rotted
If in doubt, phone 0345 464 0079 or email us and we will say what we think before you book.
What we seal
- Period & listed homes
- Sash and case windows
- Timber door frames
- Stone surrounds
- Tenement windows
- Brick reveals
How we quote for sand mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- How easy the joints are to reach
- When we can work, for business premises
- Which sealant suits the joint
- Mould in or behind the old joints
What you pay reflects the work, not guesswork. That is why we ask a few questions first.
Helping us quote
You don’t need to know the technical terms. It helps if you can tell us:
- What’s wrong with the joints now
- Photos by email, if that’s easy
- Any access issues, like height or stairs
- Where the job is, and your postcode
Asking for a quote is easy: let us know what needs doing and where. A few pictures by email make the job easier to understand.
Aftercare tips
Good habits help new joints last longer. A few tips:
- Sort the mastic before the decorators arrive
- Get any rot dealt with first
- Look over the window mastic once a year
- Keep modern sealant off the mastic
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Frames and glazing around South Weirs
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For landlords with property near Brockenhurst station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Homes close to Church of St Saviour include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
South Weirs is about 4 miles north-west of Lymington, in Hampshire. South Weirs gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. South Weirs is one of 683 places in Hampshire where we work for sand mastic. Our Southampton page covers work nearby.
Here we cover the SO42 postcode area for sand mastic. We also cover the places around South Weirs: Brockenhurst (1 mile north-east), Setley (1 mile east), Balmerlawn (2 miles north-east), Emery Down (4 miles north) and Lyndhurst (4 miles north). We also work in nearby towns such as Eastleigh (15 miles north-east), Totton (8 miles north-east), Chandler's Ford (15 miles north-east), Hedge End (15 miles north-east), Lymington (4 miles south-east) and Romsey (13 miles north).
Around South Weirs
For rail, the closest station is Brockenhurst station, about 0.9 miles east of the centre. Well-known places in the area include Lymington New Forest Hospital (3.7 miles south-east).
How it works
You do not need to clear the whole room or building, only the area right around the joints. We protect the rest, and the job takes anything from a few hours to a full day, depending on how many windows in most cases. For a village or hamlet like South Weirs, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at the surrounds with you and agree the joints to renew.
- 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
- Tell us about access, such as stairs, a lift or high-level joints
- For indoor joints, keep the area dry beforehand if you can
- Keep children and pets away from the work area
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Simply ring 0345 464 0079 or email us and describe the job, and pictures are welcome.
Advice
Towns and villages near South Weirs
More services for South Weirs
Landlord and commercial work in South Weirs
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Your questions about sand mastic in South Weirs
Do you cover smaller places like South Weirs?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you do sand mastic in South Weirs?
Yes. Our work covers London and the South East, and South Weirs is part of that. You can phone 0345 464 0079 or email us and let us know what needs doing.
How much does sand mastic cost in South Weirs?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we’ll talk you through it.
How long does the job take?
Most jobs take a few hours for a single window, longer for several, including preparation and clearing up. We will confirm how long when we quote.
What exactly is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and shaped to suit the surround.
Are you fully insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Can landlords and businesses book you?
Yes, regularly. We can quote for several properties at once, and between tenancies is a good time for the work.
Can you do several jobs on one visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.