Hampshire · England
Sand mastic for sash & case windows in Swanmore, Hampshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Swanmore, backed by a 12-month guarantee. Ask us for a quote.
- Gaps between timber frames and stone or brick
- Mastic worn away on windows facing the weather
- Gaps round a timber door in stone or brick
About our sand mastic in Swanmore
Sand mastic skins over fairly quickly but full hardening takes longer. Traditional guidance is not to paint over it and we will advise if you’re redecorating. We are often asked to deal with mastic worn away on windows facing the weather and gaps where the frame meets the masonry, across timber door frames, period & listed homes and brick reveals.
In smaller places like Swanmore, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or email us.
- Place
- Swanmore (SO32)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
The process
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the job takes a few hours per window, depending on the condition of the joints in most cases. Parking around Swanmore is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Let us know about stairs, lifts or work at height
- Mention any leaks or damp you’ve noticed
- Tell us about any previous sealing or DIY attempts
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Advice
Frames and glazing around Swanmore
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you let a flat or house near Botley station, any sash windows need sound mastic to keep draughts and rain out. If you look after a building such as Swanmore Church of England Aided Primary School, the mastic around its windows and doors needs looking after like any other building’s. If you live in an older home near Church of St Barnabas, the joint between an old wall and a newer frame is usually the first place rain gets in.
Swanmore is about 6 miles east of Hedge End, in Hampshire. Anywhere in SO32, we cover sand mastic for homes and businesses. Our Hampshire coverage runs to 683 places, and Swanmore is one of them. There’s also a page for Southampton, roughly 9 miles from Swanmore.
Here we cover the SO32 postcode area for sand mastic. Streets in the area include Church Road, Myers Close and Spring Vale, all of which we cover. Close by, we work in Hill Grove (1 mile east), Upper Swanmore (1 mile north-east), Mislingford (1 mile south-east), Shirrell Heath (1 mile south) and Kingsmead (2 miles south-east). We also work in nearby towns such as Winchester (10 miles north-west), Gosport (10 miles south), Havant (10 miles south-east), Eastleigh (7 miles west), Fareham (6 miles south) and Horndean (8 miles east).
Around Swanmore
Around Swanmore, our work takes us to homes and buildings near Swanmore College of Technology, among other places. For rail, the closest station is Botley station, roughly 3.7 miles south-west. Well-known places in the area include Bishop's Waltham Museum (1.7 miles north-west) and Knowle Hospital (4.3 miles south). Green spaces nearby include Beacon Hill and Bishops Waltham Branch LNR.
Honest limits
It helps to know what we cannot do too:
- Crumbling stone or brickwork round the window
- Decisions on consent for listed homes
- Timber that has rotted
If you’re not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
Joints and surfaces we work on
- Timber door frames
- Brick reveals
- Sash and case windows
- Stone surrounds
- Tenement windows
- Period & listed homes
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- Look over the window mastic once a year
- Avoid heavy scraping on the mastic joint
- Keep sills and gutters clear so water drains away
- Renew mastic before redecorating the windows
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look rather than patching it.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
Leave it or put it right?
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic matches what was there and that can be important for listed homes. In an older home around Swanmore, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What you get with us
- We leave the area clean and tidy
- 12-month guarantee on every job
- Arbo and Everbuild products
- Anti-fungal sanitary silicone in wet areas
Common questions in Swanmore
Do you cover Swanmore for sand mastic?
Yes, Swanmore is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will send you a clear quote.
Do you work for landlords with property near Botley station?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Will it make a mess?
No. The area is protected while we work and cleaned up afterwards.
Do the sealants smell?
Sometimes, a little. Any smell clears as the sealant cures.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we’ll talk you through it.
Nearby places to Swanmore
More services for Swanmore
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
What the job involves on each surface
Period and listed homes
Period homes look their best with traditional materials, and sand mastic is one of them.
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We can do one window or several.