Hampshire · England
Sand Mastic in Blendworth
Professional sand mastic in and around Blendworth, with old sealant always removed completely and a 12-month guarantee.
- Draughty sash windows at the surround
- Open joints round the window box
- A silicone bead on a sash window that spoils the look
Common questions in Blendworth
Is Blendworth within the area you cover?
Yes, Blendworth is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you do sand mastic in Blendworth?
Yes, Blendworth is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
What does sand mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
What guarantee comes with the work?
Our 12-month guarantee applies to all our work.
What is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
About our sand mastic in Blendworth
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. We work on tenement windows, stone surrounds and timber door frames, and the jobs we see most are window mastic to renew ahead of painting and weathered mastic on the most exposed windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Blendworth is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Whatever the size of the job, it’s backed by our 12-month guarantee in Blendworth and across Hampshire.
- Place
- Blendworth (PO8)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
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.
Why it’s worth doing now in Blendworth
New sash windows are a major, costly change and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Older cottages and farmhouses around Blendworth can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
What you get with us
- Tidy, careful work
- Homes, businesses and hotels
- 180+ five-star Google reviews
- Full insurance on every job
Read what affects the cost and what customers say.
How the job changes by surface
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
Brick reveals
Loose mastic comes out and deep gaps are packed before the new mastic goes in.
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Leave the new mastic unpainted
- Have rotten timber repaired before new mastic goes in
- Take care around the mastic when scraping paint
- Find out about consent before window work on a listed home
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at rather than patching it.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens.
Blendworth homes and the weather
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Uppark (about 4.8 miles north-east) are a reminder that the area around Blendworth has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Church of the Holy Trinity, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Letting a property close to Rowlands Castle station? Then any sash windows need sound mastic to keep draughts and rain out. Schools such as Horndean Church of England Junior School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Blendworth is about 1 mile north-east of Horndean, in Hampshire. Blendworth gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Our area takes in 683 places across Hampshire. There’s also a page for Portsmouth, roughly 8 miles from Blendworth.
We cover every part of PO8 for sand mastic and the streets around it. Other places close to Blendworth include Chalton (2 miles north-east), Forestside (3 miles east), West Marden (4 miles east), Buriton (4 miles north) and Weston (5 miles north). We also work in nearby towns such as Gosport (11 miles south-west), Havant (4 miles south), Fareham (10 miles south-west), Hedge End (14 miles west), Waterlooville (3 miles south-west) and Petersfield (6 miles north).
Local landmarks in Blendworth
We work in homes and buildings around Horndean Technology College and The Ship & Bell pub and the streets around them. The closest station to Blendworth is Rowlands Castle station, about 2.1 miles south-east of the centre. A little further out are Havant War Memorial Hospital (4.3 miles south) and Clanfield Earthwork (2.1 miles north). For a walk, there’s Windmill Hill.
How the visit works
You do not need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the job takes a few hours for a single window, longer for several in most cases. Somewhere as small as Blendworth, 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.
- Large voids are packed out first, so the mastic is not too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Clear the area around the work
- Mention any tricky access
How to get a quote
For sand mastic in Blendworth, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
What we can’t put right
We’ll always be straight with you, so here’s what sealant cannot fix:
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
- Crumbling stone or brickwork round the window
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Surfaces we seal
- Period & listed homes
- Sash and case windows
- Tenement windows
- Stone surrounds
- Brick reveals
- Timber door frames
Quotes for sand mastic in Blendworth
You’ll get a clear quote before any work starts. It takes into account:
- The number of rooms or windows
- Any working-time requirements on site
- How much there is to do
- Whether there’s mould to deal with
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
What to tell us for a quote
When you call or email, these details help:
- If it’s domestic, commercial or a hotel
- The address or postcode of the job
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To get started, ring 0345 464 0079 or drop us an email.