Hampshire · England
Sand mastic for sash & case windows in Broughton, Hampshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Broughton and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Patchy fillers round a sash window
- Cracked mastic round a front door frame
- Failed mastic on an exposed elevation
Sand mastic in Broughton
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s made from sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. If you have gaps round a timber door in stone or brick and mastic that needs renewing before redecorating, we can put it right, on stone surrounds, sash and case windows and period & listed homes alike.
Around Broughton, 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.
A 12-month guarantee comes as standard.
- Where
- Broughton (SO20)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Broughton
Is Broughton in your area for sand mastic?
Yes. We work across London and the South East, and Broughton is part of that. Just phone 0345 464 0079 or email us with a few details of the job.
Can you help a landlord with a rental near Mottisfont & Dunbridge station?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
When will the new mastic be hard?
The surface skins quite quickly and it hardens fully over a longer time. Timing depends on the weather and the joint.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Are you fully insured?
Yes, we’re fully insured for every job we do.
Can I paint the new mastic?
Traditional guidance is not to paint over sand mastic. If you’re redecorating the window, ask us first and we’ll advise.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Common problems we fix in Broughton
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
People usually contact us after spotting something like this:
- Gaps round a timber door in stone or brick
- Draughts and rain around sash boxes
- Mastic worn away on windows facing the weather
- Crumbling sand mastic round a window
For site and facilities teams at buildings such as Broughton Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- How the joint is cleaned and prepared
- Whether you can choose the colour
- Are they insured?
- What guarantee comes with the work
What the job involves on each surface
Sash and case windows
A sash window’s box frame sits in the masonry opening. The gap round it is pointed with sand mastic.
Period and listed homes
A traditional finish suits a period property.
Why act early in Broughton
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic suits the building and finishes neatly against the masonry. Around Broughton, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Broughton clients choose us
- 20+ years of sealant experience
- Full insurance on every job
- Approved under the ARBOMaster scheme
- We never seal over old sealant
Read our cost guide or customer reviews.
Towns and villages near Broughton
What else we do in Broughton
Landlords, agents and businesses in Broughton
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
Letting agents and landlords in Broughton can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Masonry that needs repairing
- Planning or listed building consent (your local planning authority decides)
- Rotten sashes, sills or window boxes (a joiner’s job)
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before you book.
Surfaces we seal
- Tenement windows
- Sash and case windows
- Brick reveals
- Period & listed homes
- Stone surrounds
- Timber door frames
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it usually takes a few hours per window, depending on the condition of the joints. Somewhere as small as Broughton, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we look at the surrounds with you and agree what needs doing.
- 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.
- We dress the surface so it sits neatly against the masonry.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
Get a quote
Want a quote for sand mastic? Please call 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Read more
Aftercare tips
Aftercare is simple:
- Take care around the mastic when scraping paint
- Check the mastic when you check the paintwork
- Keep sills and gutters clear so water drains away
- Ask us before painting near the mastic
Don’t run silicone over the new mastic. If anything cracks, get it looked at rather than patching it.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall so early renewal protects both.
What sand mastic looks like in Broughton
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. With historic houses such as Mottisfont Abbey (about 3.9 miles south) nearby, there’s older building stock in the area around Broughton as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Homes close to Church of St Mary the Virgin include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in. For landlords with property near Mottisfont & Dunbridge station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Broughton is about 8 miles north-west of Romsey, in Hampshire. From the centre of Broughton to the outskirts, we cover sand mastic for every kind of property. Across Hampshire, we cover 683 places, Broughton among them. For nearby work, see our Southampton page (14 miles or so).
All of SO20 is within our area for sand mastic. Whether your property is on High Street, Greyhound Mews and Plough Gardens or anywhere close by, our applicators can take on the job. Nearby, we also carry out sand mastic in Houghton (2 miles east), Horsebridge (3 miles south-east), Mottisfont (4 miles south), Stonymarsh (4 miles south-east) and Lockerley (4 miles south). Larger places within reach include Winchester (11 miles east), Eastleigh (13 miles south-east), Andover (9 miles north-east), Totton (12 miles south), Chandler's Ford (11 miles south-east) and Romsey (8 miles south-east).
Landmarks near Broughton
Typical jobs here are in homes near The Tally Ho Public House, among other places. The nearest railway station is Mottisfont & Dunbridge station, roughly 4.3 miles south.