Hampshire · England
Sand Mastic in Catherington
Professional sand mastic in and around Catherington, with old sealant always removed completely.
- Open joints round the window box
- Old sand mastic that has cracked, crumbled or fallen out
- Draughty sash windows at the surround
About our sand mastic in Catherington
Our applicators renew the sand mastic around sash and case windows and doors set in stone or brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. We work on brick reveals, sash and case windows and stone surrounds, and people most often call us about modern sealant on a period surround and mastic dropping out of the joint.
Homes in small places like Catherington often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or email us.
- Place
- Catherington (PO8)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
You do not need to clear the whole room or building before we come, only the area right around the joints. Everything nearby is protected, and the work takes a few hours per window, depending on the condition of the joints for a typical job. In a small place like Catherington, access is usually the main thing to plan. 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.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- On commercial sites, let us know about site rules
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
Every job is quoted individually. Simply ring 0345 464 0079 or drop us an email and describe the job and send pictures if you have them.
Read more
More services for Catherington
How we quote for sand mastic
For a quick quote, just ask. The main things that affect it are:
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
- Which sealant suits the joint
Combining jobs into one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- Any previous sealing or DIY work
- Where the job is, and your postcode
- Roughly how big the job is
- What’s wrong with the joints now
There’s no standard price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Why it’s worth doing now in Catherington
Before painting the windows, it pays to renew the mastic. Painting over failed mastic doesn’t seal it and traditional guidance is to leave the new mastic unpainted. Around Catherington, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first and agree the price before starting.
Why book with us
- A 12-month guarantee on all work
- We leave the area clean and tidy
- Approved under the ARBOMaster scheme
- Domestic, commercial and hotel work
See what affects the cost and what customers say.
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Keep sills and gutters clear so water drains away
- Leave the new mastic unpainted
- Keep modern sealant off the mastic
- Go gently near the mastic when preparing windows
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
What sealant work can’t fix
We will always be straight with you, so here’s what sealant cannot fix:
- Cracked or broken glass
- Masonry that needs repairing
- Sashes that need overhauling
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
What we seal
- Stone surrounds
- Period & listed homes
- Brick reveals
- Tenement windows
- Sash and case windows
- Timber door frames
Your questions about sand mastic in Catherington
Is Catherington in your area for sand mastic?
Yes. We work across London and the South East, and Catherington is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
Do you work for landlords with property near Rowlands Castle station?
Yes. We work for landlords and letting agents as well as householders. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Do the sealants smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Do you remove the old sealant?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we will advise.
Should I check with the council before work on a listed or conservation-area home?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
Landlords, agents and businesses in Catherington
We also work for property managers and facilities teams in Catherington and across Hampshire. Several sites can go on one quote.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Frames and glazing around Catherington
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Rowlands Castle station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. For an older house near a landmark such as Church of All Saints, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as Catherington Church of England Infant School, larger buildings have plenty of frames, and the mastic around each one ages.
Catherington is about 2 miles north of Horndean, in Hampshire. Jobs in Catherington get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our Hampshire coverage runs to 683 places, Catherington among them. We also work in Portsmouth, around 9 miles away.
Work in PO8 works the same way as everywhere else we cover. That includes homes and businesses on Glamorgan Road, Wrexham Grove and White Dirt Lane and the roads around them. We also cover the places around Catherington: Clanfield (1 mile north), Lovedean (2 miles south-west), Horndean (2 miles south), Wecock Farm (2 miles south-west) and Anmore (3 miles south-west). Larger places within reach include Gosport (11 miles south-west), Havant (5 miles south), Eastleigh (15 miles west), Fareham (10 miles south-west), Alton (15 miles north) and Hedge End (13 miles west).
Local landmarks in Catherington
Locally, jobs take us to homes and businesses close to Horndean Technology College, among other places. The closest station to Catherington is Rowlands Castle station, roughly 3.5 miles south-east. Well-known places in the area include Havant War Memorial Hospital (5.3 miles south) and Clanfield Earthwork (1.7 miles north-east). Green spaces nearby include Windmill Hill.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.