Hampshire · England
Sand Mastic in Hundred Acres
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Hundred Acres, backed by a 12-month guarantee. Ask us for a quote.
- Old cement repairs round a window that have failed
- A silicone bead on a sash window that spoils the look
- Crumbling sand mastic round a window
How we handle sand mastic in Hundred Acres
Traditional burnt sand mastic that sits naturally against stone and brick. It’s a good fit for period properties where a modern sealant bead would stand out. Common call-outs are for patchy fillers round a sash window and cracked mastic round a front door frame, on stone surrounds, tenement windows and sash and case windows.
Around Hundred Acres, 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, it’s backed by our one-year guarantee.
- Location
- Hundred Acres (PO17)
- Region
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
There’s no need to move everything out, just the space around the work. We protect the rest, and the job takes a few hours for a single window, longer for several in most cases. In a small place like Hundred Acres, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any sign-in or site rules at work premises
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Read more
Landlord and commercial work in Hundred Acres
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
We also work for property managers and facilities teams in Hundred Acres and across Hampshire. Several sites can be quoted together, and we are fully insured.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Sort the mastic before the decorators arrive
- Get any rot dealt with first
- Take care around the mastic when scraping paint
- Look over the window mastic once a year
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Sound mastic protects the frame. Failed mastic lets water reach the timber and timber that stays wet can rot.
Common problems we fix in Hundred Acres
Rain on the window surround works into any crack and loosens it further. Exposed elevations generally fail first.
People normally contact us when they notice something like this:
- Old cement repairs round a window that have failed
- Modern sealant on a period surround
- Mastic that needs renewing before redecorating
- Draughts and rain around sash boxes
For landlords with property near Fareham station, any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- How the joint is cleaned and prepared
- Whether you can choose the colour
- Is VAT in the price?
- How much experience the applicator has
Common questions in Hundred Acres
Is Hundred Acres within the area you cover?
Yes, Hundred Acres is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you do sand mastic in Hundred Acres?
Yes. Our work covers London and the South East, and Hundred Acres is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing.
What exactly is sand mastic?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Hundred Acres.
Is the work guaranteed?
You get our 12-month guarantee on every job.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
Sand mastic in Hundred Acres: local notes
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of St Nicholas, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Hundred Acres is about 4 miles north-east of Fareham, in Hampshire. We provide sand mastic to homeowners, landlords and businesses in Hundred Acres and nearby. Hundred Acres is one of 683 towns and villages in Hampshire we cover. For nearby work, see our Portsmouth page (7 miles or so).
We cover every part of PO17 for sand mastic and the streets around it. Whether your property is on Hundred Acres Road and Southwick Road or a nearby road, we can help. We also cover North Boarhunt (1 mile south-east), Wickham Common (1 mile south-west), Crockerhill (2 miles south-west), Welborne (2 miles south-west) and Boarhunt (2 miles south). Further out, we also cover Winchester (13 miles north-west), Gosport (7 miles south), Havant (8 miles east), Eastleigh (9 miles north-west), Fareham (4 miles south-west) and Horndean (6 miles east).
Local landmarks in Hundred Acres
For rail, the closest station is Fareham station, roughly 3.5 miles south-west. Nearby you’ll also find Fareham Shopping Centre (3.3 miles south) and Portchester Castle (4.7 miles south-east). Green spaces nearby include St Clair's Meadow and Portsdown Hill.
Why it’s worth doing now in Hundred Acres
New sash windows are a major, costly change and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Around Hundred Acres, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
What you get with us
- Approved under the ARBOMaster scheme
- Arbo and Everbuild products
- Over 20 years’ experience
- A 12-month guarantee on all work
Take a look at what affects the cost and customer reviews.
How we quote for sand mastic
We do not publish a price list, because no two jobs are the same. What we look at:
- How many rooms, windows or areas are involved
- The size of the job
- Working hours on commercial sites
- Mould in or behind the old joints
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.
What we need to know
Before you ask for a quote, have a think about:
- Access, such as stairs, a lift or height
- The rough size of the job
- Whether it’s a home or a business
- If someone has resealed it before
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.
Nearby places to Hundred Acres
Other services in Hundred Acres
What the job involves on each surface
Period and listed homes
A traditional finish suits a period property.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.