Hampshire · England
Sand mastic for sash & case windows in Clanfield, Hampshire
Problem with your window and door surrounds in Clanfield? We cut out the old, prepare the joints and apply the right sealant.
- Gaps between timber frames and stone or brick
- Draughty sash windows at the surround
- Crumbling sand mastic round a window
About our sand mastic in Clanfield
Sand mastic skins over fairly quickly but full hardening takes longer. Traditionally, sand mastic is left unpainted and we’ll advise if you are redecorating. We work on sash and case windows, tenement windows and timber door frames, and common reasons people get in touch are silicone on a period window that looks wrong and weathered mastic on the most exposed windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Clanfield is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Our work is backed for twelve months.
- Place
- Clanfield (PO8)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
The process
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours per window, depending on the condition of the joints. Somewhere like Clanfield needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Mention any tricky access
- Keep children and pets away from the work area
- Let us know about parking restrictions
Get a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will talk you through the work before giving you a price.
Related advice
What happens if it’s left?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. In a small place like Clanfield, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before we start.
What you get with us
- Tidy, careful work
- A 12-month guarantee on all work
- Anti-fungal silicone where joints get wet
- Domestic, commercial and hotel work
Read what affects the cost or customer reviews.
Landlords, agents and businesses in Clanfield
If you manage several properties in or around Clanfield, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Have rotten timber repaired before new mastic goes in
- Don’t run silicone over sand mastic
- Plan mastic work ahead of painting
- Clear gutters so water does not pour onto the windows
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
Quotes for sand mastic in Clanfield
For a quick quote, just ask. The main things that affect it are:
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
- Which sealant suits the joint
- The amount of work
Doing several joints on one visit generally makes better use of the time than several visits. You will get one clear quote for the whole job.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Any access issues, like height or stairs
- Where the property is
- Whether it’s a home or a business
- The rough size of the job
Getting a quote is simple: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Places near Clanfield
Other services in Clanfield
Honest limits
New sealant cannot fix everything, and we will tell you before we start. Sealant won’t put right:
- Sashes that need overhauling
- Crumbling stone or brickwork round the window
- Putty and glazing repairs
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Where we work in Clanfield
- Tenement windows
- Timber door frames
- Period & listed homes
- Sash and case windows
- Brick reveals
- Stone surrounds
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Clanfield questions
Do you work for landlords with property near Rowlands Castle station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Is Clanfield within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is there any odour?
Sometimes, a little. It fades as the sealant cures.
Is the work guaranteed?
All our work has a 12-month guarantee.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
Which is right for my windows, sand mastic or modern sealant?
It depends on the window. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
What’s sand mastic made of?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
What sand mastic looks like in Clanfield
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.
For an older house near a landmark such as Church of St James, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Letting a property close to Rowlands Castle station? Then older sash windows in a rental need their mastic kept sound to keep the weather out. Managing a site like Clanfield Junior School? Then the mastic around its windows and doors needs looking after like any other building’s.
Clanfield is about 3 miles north of Horndean, in Hampshire. Whether you’re in the middle of Clanfield or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our Hampshire coverage runs to 683 places, and Clanfield is one of them. Our Portsmouth page covers work nearby.
All of PO8 is within our area for sand mastic. We cover properties on South Lane, Twyford Rise and Homefield Way and the roads around them. Close by, we work in Catherington (1 mile south), Lovedean (2 miles south), Horndean (3 miles south), Wecock Farm (3 miles south) and Anmore (3 miles south-west). We also work in nearby towns such as Gosport (11 miles south-west), Havant (6 miles south), Eastleigh (15 miles west), Fareham (10 miles south-west), Alton (14 miles north) and Hedge End (13 miles west).
Near you in Clanfield
In Clanfield, that means homes and buildings near Rising Sun Inn and Horndean Technology College, among other places. The closest station to Clanfield is Rowlands Castle station, about 4.2 miles south-east of the centre. Other landmarks nearby include Petersfield Community Hospital (5.1 miles north-east) and Clanfield Earthwork (1.2 miles east). Green spaces nearby include Windmill Hill.