Hampshire · England
Sand Mastic in Soberton Heath
Window and door surrounds in Soberton Heath need attention? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Mastic worn away on windows facing the weather
- Patchy fillers round a sash window
- Draughty sash windows at the surround
How we handle sand mastic in Soberton Heath
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. If you have silicone on a period window that looks wrong and cement or filler used on old window joints that has cracked, we can help, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Soberton Heath is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
There’s a 12-month guarantee on every job.
- Location
- Soberton Heath (SO32, PO17)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Looking after it afterwards
Aftercare is simple:
- Get any rot dealt with first
- Check with your local planning authority if your home is listed
- Take care around the mastic when scraping paint
- Renew mastic before redecorating the windows
Do not run silicone over the new mastic. If anything cracks, get it looked at rather than patching it.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Do you need sand mastic in Soberton Heath?
Some old mastic was never deep enough. A thin layer doesn’t hold well so we make sure the new mastic is the right thickness.
Signs it’s time to call us include:
- Modern sealant on a period surround
- Draughty sash windows at the surround
- Mastic worn away on windows facing the weather
- Tired mastic found when preparing windows for paint
Schools such as Newtown Soberton Infant 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
- Whether all the old sealant comes out first
- Who turns up on the day
- Are they insured?
- How the joint is cleaned and prepared
Soberton Heath: your questions answered
Is Soberton Heath in your area for sand mastic?
Yes. We work across London and the South East, and Soberton Heath is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
What guarantee comes with sand mastic in Soberton Heath?
All our work, in Soberton Heath and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us and we are fully insured.
Where do you work from?
Mr Mastic is based in Crawley. We cover Soberton Heath and the rest of Hampshire, along with the rest of our area.
How long does sand mastic take to go off?
Not straight away. The skin forms first, and the full set comes later and we will give you an idea for your job.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Should I check with the council before work on a listed or conservation-area home?
Check with your local planning authority. They’ll tell you if consent is needed.
Places near Soberton Heath
What else we do in Soberton Heath
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
The process
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it normally takes anything from a few hours to a full day, depending on how many windows. In a small place like Soberton Heath, access is usually the main thing to plan. 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 isn’t too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Keep children and pets away from the work area
- Let us know about earlier repairs to the joints
- Mention any tricky access
Ask for a quote
For sand mastic in Soberton Heath, phone 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.
Read more
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can be quoted together.
How the job changes by surface
Brick reveals
We rake out the old mastic and pack deep voids before the new mastic goes in.
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We can do one window or several.
Windows and doors in Soberton Heath
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Church of the Holy Trinity, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Soberton Heath is about 5 miles north-west of Waterlooville, in Hampshire. We carry out sand mastic for homes and businesses in Soberton Heath and nearby. 683 places in Hampshire are on our list, from the larger towns to small villages. You can also see our page for Portsmouth, roughly 8 miles from Soberton Heath.
Here we cover the SO32 and PO17 postcode area for sand mastic. Local streets include Forester Road, May Bush Lane and Heath Road, and we cover them all. Close by, we work in Southend (1 mile east), Woodend (1 mile west), Newtown (1 mile south), Kingsmead (1 mile west) and Mislingford (1 mile west). Further out, we also cover Winchester (12 miles north-west), Gosport (8 miles south), Havant (8 miles south-east), Eastleigh (10 miles west), Fareham (6 miles south-west) and Horndean (6 miles east).
Near you in Soberton Heath
Typical jobs here are in homes near The Bold Forester Public House, among other places. A little further out are Bishop's Waltham Museum (3.9 miles north-west) and Knowle Hospital (4.1 miles south-west). For a walk, there’s Portsdown Hill and St Clair's Meadow.
What affects the cost of sand mastic
Your quote is based on your job. We take into account:
- How much there is to do
- How many areas need sealing
- The product the joint needs
- How easy the joints are to reach
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
Want a quote for sand mastic? Please call 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and send you a clear quote before any work starts.