Hampshire · England
Steep Marsh Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Steep Marsh and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Weathered mastic on the most exposed windows
- Old sand mastic that has cracked, crumbled or fallen out
- Silicone on a period window that looks wrong
How we quote for sand mastic
Your quote is based on your job. We look at:
- Which sealant suits the joint
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
- The number and length of the joints
What you pay reflects the work, not a rough estimate. That is why we ask about the job first and send you a clear quote before any work starts.
What to tell us for a quote
When you contact us, these details help:
- Any previous sealing or DIY work
- The problem you’ve noticed
- Where the property is
- If it’s domestic, commercial or a hotel
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
About our sand mastic in Steep Marsh
A silicone bead around a sash window can look out of place and is not always the right material. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. If you have open joints round the window box and mastic dropping out of the joint, we can put it right, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Steep Marsh is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
You get a one-year guarantee, the same in Steep Marsh as everywhere else we work.
- Location
- Steep Marsh (GU32)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What we are called out for in Steep Marsh
Previous repairs in cement or silicone often trap water or crack away. They do not move with the timber and we normally remove them.
If you can see any of these, it’s time to have the joints looked at:
- Gaps between timber frames and stone or brick
- Mastic dropping out of the joint
- Draughts and rain around sash boxes
- Old cement repairs round a window that have failed
Managing a site like Steep Church of England Voluntary Controlled Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Questions to ask before you book
- Which colour the sealant will be
- Whether they seal over old material or remove it
- What product goes in the joint
- What happens if the job turns out different
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Take care around the mastic when scraping paint
- Keep modern sealant off the mastic
- Ask us before painting near the mastic
- Inspect the joints round the windows every year or so
Leave the new mastic unpainted, as traditional guidance advises. If you’re redecorating, ask us first.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
What we cannot put right
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Decayed frames that need repair
- Crumbling stone or brickwork round the window
- Sashes that need overhauling
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Where we work in Steep Marsh
- Timber door frames
- Stone surrounds
- Tenement windows
- Brick reveals
- Period & listed homes
- Sash and case windows
Steep Marsh: your questions answered
Do you cover smaller places like Steep Marsh?
Yes. Steep Marsh is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you do sand mastic in Steep Marsh?
Yes, Steep Marsh is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
I’m a tenant. Can you help?
Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.
Which is right for my windows, sand mastic or modern sealant?
We’ll talk it through with you. Period homes often look best with sand mastic, and modern sealants suit newer frames.
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 advise.
Places near Steep Marsh
More services for Steep Marsh
What happens on the day
When we arrive, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work starts. The work normally takes a few hours for a single window, longer for several. Somewhere as small as Steep Marsh, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Let us know if you’ve seen damp or leaks
- Keep pets and children clear of the area while we work
Get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, call 0345 464 0079 or send us an email.
Related advice
Surface by surface
Brick reveals
An open joint at a brick reveal lets weather in. Renewing the mastic closes it.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
Frames and glazing around Steep Marsh
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For landlords with property near Petersfield station, any sash windows need sound mastic to keep draughts and rain out. In the older streets around Church of All Saints, the joint between an old wall and a newer frame is generally the first place rain gets in.
Steep Marsh is about 2 miles north of Petersfield, in Hampshire. Our applicators cover sand mastic for homeowners, landlords and businesses in Steep Marsh. We cover 683 towns and villages across Hampshire. For nearby work, see our Portsmouth page.
Every address in GU32 is covered for sand mastic. Other places close to Steep Marsh include Steep (1 mile south), Oakshott (1 mile north), Sheet (1 mile south-east), Petersfield (2 miles south) and Hawkley (2 miles north). We also work in nearby towns such as Havant (12 miles south), Horndean (9 miles south), Alton (8 miles north), Waterlooville (11 miles south), Purbrook (12 miles south) and Bordon (7 miles north-east).
Near you in Steep Marsh
Around Steep Marsh, our work takes us to homes and buildings near The Cricketers Inn and The Petersfield School, among other places. Steep Marsh’s nearest station is Petersfield station, roughly 1.7 miles south. Other landmarks nearby include Bear Museum (2 miles south) and Petersfield Community Hospital (1.8 miles south). Open spaces near Steep Marsh include Wheatham Hill and Liss Riverside Railway Walk South.