Hampshire · England
Sand mastic for sash & case windows in Hensting, Hampshire
Specialist sand mastic for Hensting: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- A silicone bead on a sash window that spoils the look
- Failed mastic on an exposed elevation
- Window mastic to renew ahead of painting
Aftercare tips
A little care helps the new joints last. We recommend:
- Inspect the joints round the windows every year or so
- Don’t run silicone over sand mastic
- Get any rot dealt with first
- Keep sills and gutters clear so water drains away
Leave the new mastic unpainted, which is the traditional advice. Ask us before any decorating around it.
Sound mastic protects the frame. Once it fails, water can sit against the timber, which can lead to rot.
Sand mastic for homes and businesses in Hensting
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 cracked mastic round a front door frame and mastic dropping out of the joint, across sash and case windows, period & listed homes and brick reveals.
Around Hensting, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Hensting (SO50)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of sand mastic
The quote reflects the job in front of us. We look at:
- Whether the work is at height
- The product the joint needs
- When we can work, for business premises
- The number of rooms or windows
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will go through it with you.
Asking for a quote
When you call or email, it’s useful to know:
- Access, such as stairs, a lift or height
- Whether it’s a home or a business
- Roughly how big the job is
- If someone has resealed it before
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
More services for Hensting
What we’re called out for in Hensting
Some old mastic was never deep enough. A thin layer doesn’t hold well, which is why we pack deep voids first and get the depth right.
It’s worth asking for a quote if you see:
- Crumbling sand mastic round a window
- Old cement repairs round a window that have failed
- Modern sealant on a period surround
- Gaps where the frame meets the masonry
If you let a flat or house near Shawford station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Comparing quotes
- How the surfaces are prepared before sealing
- Is VAT in the price?
- Who turns up on the day
- Is the old sealant removed completely?
What we do, step by step
You do not need to clear the whole room or building, only the area right around the joints. We protect the rest, and the work takes a few hours for a single window, longer for several in most cases. In a small place like Hensting, 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.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- On commercial sites, let us know about site rules
- Tell us about any water getting in
- Keep children and pets away from the work area
How to get a quote
For sand mastic in Hensting, call 0345 464 0079 or email us. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Advice
Frames and glazing around Hensting
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.
Homes close to Church of the Holy Trinity include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
Hensting is about 3 miles north-east of Eastleigh, in Hampshire. For sand mastic in and around Hensting, it’s easy to get a quote: please ring 0345 464 0079 or email us. We’re based in Crawley and cover Hampshire. We cover 683 towns and villages across Hampshire, from the larger towns to small villages. There’s also a page for Southampton, about 7 miles away.
Jobs for sand mastic in SO50 works the same way as everywhere else we cover. If you’re just outside Hensting, we cover Owslebury (1 mile north-east), Owslebury Bottom (1 mile north-east), Baybridge (2 miles east), Morestead (2 miles north) and Lane End (4 miles north-east). Larger places within reach include Winchester (4 miles north), Gosport (15 miles south-east), Eastleigh (3 miles south-west), Fareham (11 miles south), Horndean (14 miles south-east) and Totton (11 miles south-west).
What’s near Hensting
Typical jobs here are in homes near Ship Inn and the streets around them. Hensting’s nearest station is Shawford station, roughly 2.2 miles north-west of the centre. Well-known places in the area include St John's Rooms And Chapel (4.3 miles north) and Eastleigh Museum (3.5 miles south-west). Open spaces near Hensting include Shawford Down and Twyford Down.
Why deal with it now?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic does not seal it and traditional guidance is to leave the new mastic unpainted. In a small place like Hensting, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Why book with us
- An ARBOMaster approved applicator
- Anti-fungal silicone where joints get wet
- Every job guaranteed for a year
- Neat joints and a tidy finish
Take a look at our cost guide or our reviews.
DIY versus a professional finish
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
Common questions in Hensting
Do you work for landlords with property near Shawford station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you cover smaller places like Hensting?
Yes. Hensting is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you offer different sealant colours?
In most cases you can choose. We will explain which colours are available and agree one before work begins.
Will it make a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
What guarantee comes with the work?
You get our one-year guarantee on every job.
Can I add another job to the visit?
Yes, we can. More than one area can go on one quote.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Hensting and the rest of Hampshire.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
What we can’t put right
New sealant cannot fix everything, and we will tell you before we start. Sealant won’t put right:
- Sash cords, weights and draught-proofing of the sashes
- Whether work needs listed building consent
- Decayed frames that need repair
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
Surfaces we seal
- Timber door frames
- Period & listed homes
- Brick reveals
- Tenement windows
- Stone surrounds
- Sash and case windows