Hampshire · England
Purbrook Heath Sand Mastic
Sand mastic in Purbrook Heath from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Old cement repairs round a window that have failed
- Window mastic to renew ahead of painting
- Open joints round the window box
Sand mastic in Purbrook Heath, done properly
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant and we’ll explain which is best for yours. If you have gaps where the frame meets the masonry and mastic that needs renewing before redecorating, we can put it right, on brick reveals, sash and case windows and period & listed homes alike.
Around Purbrook Heath, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
We stand behind the work with a one-year guarantee, so you’re covered after we’ve gone.
- Place
- Purbrook Heath (PO7)
- Region
- Hampshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Different surfaces, different methods
Stone surrounds
Old stone surrounds are often uneven, so the gap is not the same all the way round. Sand mastic is shaped by hand to suit.
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
What we cannot put right
Before you book, it’s worth knowing the limits:
- Sash cords, weights and draught-proofing of the sashes
- Broken panes
- Whether work needs listed building consent
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Surfaces we seal
- Period & listed homes
- Stone surrounds
- Tenement windows
- Timber door frames
- Brick reveals
- Sash and case windows
Aftercare tips
So the new joints stay in good condition:
- Have rotten timber repaired before new mastic goes in
- Clear gutters so water does not pour onto the windows
- Ask the planning authority about consent for listed or conservation-area homes
- Avoid heavy scraping on the mastic joint
Don’t run silicone over the new mastic. If anything cracks, get it looked at before trying a quick fix.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
How we quote for sand mastic
Jobs vary more than people expect. What affects the quote:
- When we can work, for business premises
- Any mould that needs treating
- Whether the work is at height
- How many areas need sealing
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we’ll explain what it covers.
Asking for a quote
To help us quote quickly, please include:
- How many joints, rooms or windows are involved
- A few photos by email, if you can
- Where the property is
- Access, such as stairs, a lift or height
If you’re in Purbrook Heath and need sand mastic, call 0345 464 0079 or email us. Tell us what the problem is and where, and you’ll get a clear quote before we start.
Landlords, agents and businesses in Purbrook Heath
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
What we do, step by step
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a single window, longer for several. For a village or hamlet like Purbrook Heath, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Let us know about parking restrictions
- Clear the area around the work
- Try not to wet indoor joints just before the visit
Get a quote
We quote each job on its own, so the first step is telling us about yours. Simply call 0345 464 0079 or drop us an email and describe the job, and photos are welcome.
Read more
Towns and villages near Purbrook Heath
Other services in Purbrook Heath
Leave it or put it right?
Not every filler suits an old window surround. Sand mastic is the like-for-like choice and that can be important for listed homes. Around Purbrook Heath, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Why Purbrook Heath clients choose us
- Experience in homes, commercial sites and hotels
- Over 20 years’ experience
- A 12-month guarantee on all work
- 180+ five-star Google reviews
See our cost guide or customer reviews.
Purbrook Heath: your questions answered
Does the coastal weather in Purbrook Heath affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Do you cover smaller places like Purbrook Heath?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Can I paint the new mastic?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we’ll talk you through it.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Can you replace silicone on a period window with sand mastic?
Yes, we do this often. All the old silicone is removed first so the mastic beds in well.
Do you work for letting agents?
Yes, often. We can quote for several properties at once, and between tenancies is a good time for the work.
Should I use sand mastic or silicone?
We will help you decide. Period homes often look best with sand mastic and newer frames suit modern sealant.
What sand mastic looks like in Purbrook Heath
Purbrook Heath is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. 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.
For an older house near a landmark such as Church of St John, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Schools such as Purbrook Junior School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. Rented homes near Cosham station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Purbrook Heath is about 1 mile west of Purbrook, in Hampshire. Homes, rented property, offices and hotels in Purbrook Heath is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. Across Hampshire, we cover 683 places, and Purbrook Heath is one of them.
All of PO7 is covered for sand mastic. Local streets include Newlands Lane and Purbrook Heath Road, all of which we cover. We also cover the places around Purbrook Heath: Widley (1 mile south), Purbrook (1 mile east), Waterlooville (1 mile north-east), Furzeley Corner (2 miles north) and Drayton (2 miles south). We also work in nearby towns such as Gosport (6 miles south-west), Havant (3 miles east), Eastleigh (14 miles north-west), Fareham (6 miles west), Horndean (3 miles north-east) and Hedge End (11 miles west).
Local landmarks in Purbrook Heath
Locally, jobs take us to homes and businesses close to George Inn and Purbrook Park School and the streets around them. The closest station to Purbrook Heath is Cosham station, about 1.9 miles south. Other landmarks nearby include Queen Alexandra Hospital (1.3 miles south-west) and Portchester Castle (3.4 miles south-west). The countryside around Purbrook Heath includes Southmoor Nature Reserve and Portsdown Hill.