Hampshire · England
Sand mastic for sash & case windows in South Harting, Hampshire
We cover South Harting for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Weathered mastic on the most exposed windows
- Silicone on a period window that looks wrong
- Mastic dropping out of the joint
Sand mastic for homes and businesses in South Harting
Sand mastic skins over fairly quickly but full hardening takes longer. Traditional guidance is not to paint over it, so ask us before you decorate. We are often asked to deal with window mastic to renew ahead of painting and wind and rain getting in round a sash window, on timber door frames, stone surrounds and tenement windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around South Harting is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Every job comes with a one-year guarantee, wherever you are in Hampshire.
- Location
- South Harting (GU31)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Sort the mastic before the decorators arrive
- Do not paint over the new mastic
- Find out about consent before window work on a listed home
- Check the mastic when you check the paintwork
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.
What happens if it’s left?
New sash windows are a major, costly change, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Around South Harting, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
Why us?
- Trusted Arbo and Everbuild sealants
- ARBOMaster approved applicator
- Tidy, careful work
- Over 20 years’ experience
Take a look at what affects the cost and customer reviews.
What we’re called out for in South Harting
Sand mastic slowly weathers. It hardens, cracks and starts to come away from the frame or the masonry.
Keep an eye out for any of the following:
- Silicone on a period window that looks wrong
- Cement or filler used on old window joints that has cracked
- Wind and rain getting in round a sash window
- Gaps where the frame meets the masonry
Schools such as Harting CofE Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- How the joint is cleaned and prepared
- Whether the sealant suits the joint
- Is VAT in the price?
- Whether they’re fully insured
Your questions about sand mastic in South Harting
Do you cover South Harting for sand mastic?
Yes. We work across London and the South East, and South Harting is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Is South Harting within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is it possible to take out silicone and use sand mastic instead?
In most cases. We remove the silicone and clean the joint, then point it with sand mastic.
Is there any odour?
There can be a smell while the sealant cures. Ventilation helps.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can sand mastic be painted?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
Can I choose the sealant colour?
We will suggest a colour to suit the surroundings, from white and clear to greys and other shades. The choice depends on the product the joint needs.
Do you work for landlords and businesses?
Yes. Domestic, commercial and hotel work are all part of what we do.
When something else is needed
To be straight with you, some problems need a different trade:
- Sashes that need overhauling
- Decayed frames that need repair
- Broken panes
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before you book.
What we seal
- Brick reveals
- Period & listed homes
- Tenement windows
- Timber door frames
- Stone surrounds
- Sash and case windows
How the visit works
There is not much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes a few hours per window, depending on the condition of the joints. Somewhere as small as South Harting, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Before we arrive
- Tell us if parking is tricky
- Mention any tricky access
- Keep children and pets away from the work area
Ask for a quote
Every job is quoted individually, so start by telling us what you need. Just call 0345 464 0079 or drop us an email with the details, and photos are welcome.
Related advice
What affects the quote in South Harting
You’ll get a clear quote before any work starts. It’s based on:
- The type of sealant required
- Whether there’s mould to deal with
- How many rooms, windows or areas are involved
- Access and height
Combining jobs into one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- A few pictures by email, if you can
- Any previous sealing or DIY work
- The rough size of the job
- The type of property
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Sand mastic in South Harting: local notes
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Uppark (about 1.2 miles south-west) nearby, there’s older building stock in the area around South Harting as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Homes close to The Parish Church of St Mary & St Gabriel include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Rented homes near Petersfield station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
South Harting is about 3 miles south-east of Petersfield, in Hampshire. Homes, rented property, offices and hotels in South Harting is covered for sand mastic. The work is guaranteed for a year. 683 places in Hampshire are on our list. There’s also a page for Portsmouth, about 14 miles away.
Postcode districts we cover here for sand mastic: GU31. Sand mastic is available to properties on The Square, Smithfield and Mill Lane and the roads around them. We also cover East Harting (1 mile east), Nyewood (2 miles north-east), Elsted (2 miles east), Compton (3 miles south) and Dumpford (3 miles north-east). We also work in nearby towns such as Havant (9 miles south-west), Horndean (7 miles south-west), Alton (13 miles north), Waterlooville (9 miles south-west), Petersfield (3 miles north-west) and Purbrook (10 miles south-west).
Around South Harting
Around South Harting, our work takes us to homes and buildings near The Ship Inn and the streets around them. The nearest railway station is Petersfield station, roughly 3.7 miles north-west of the centre. Other landmarks nearby include Bear Museum (3.3 miles north-west) and Petersfield Community Hospital (3.6 miles north-west). Green spaces nearby include Iping and Stedham Commons and Oakham Hill.
Towns and villages near South Harting
Also in South Harting
Surface by surface
Sash and case windows
Most of our sand mastic work is on sash windows. Each joint round the box is raked out and renewed.
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. We rake it out and renew it.