West Sussex · England
Stedham Sand Mastic
Sand mastic in Stedham from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- A silicone bead on a sash window that spoils the look
- Mastic dropping out of the joint
- Wind and rain getting in round a sash window
What we’re called out for in Stedham
Paint, silicone or cement used over old mastic causes problems. They don’t move with the timber and we normally remove them.
Look out for these signs:
- Gaps where the frame meets the masonry
- Cement or filler used on old window joints that has cracked
- Mastic that needs renewing before redecorating
- Mastic worn away on windows facing the weather
If you look after a building such as Stedham Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before booking
- What preparation is included
- What happens if the job turns out different
- Who does the work, and how experienced they are
- Whether they seal over old material or remove it
Sand mastic in Stedham
Traditional burnt sand mastic blends with stone and brick surrounds. It’s a good fit for period properties where a modern sealant bead would stand out. If you have old cement repairs round a window that have failed and cracked mastic round a front door frame, we can put it right, whatever the surface.
Outdoor sealant needs dry, clean surfaces, so work on frames around Stedham is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Where
- Stedham (GU29)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Stedham questions
Do you cover Stedham for sand mastic?
Yes, Stedham is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll send you a clear quote.
Is there a guarantee on sand mastic in Stedham?
All our work, in Stedham and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Do you offer different sealant colours?
We help you choose a colour that suits, from white and clear to greys and other shades. The choice depends on the product the joint needs.
Which is right for my windows, sand mastic or modern sealant?
We’ll help you decide. Period homes often look best with sand mastic, and modern sealants suit newer frames.
Where do you work from?
Mr Mastic is based in Crawley. We cover Stedham and the rest of West Sussex, along with the rest of our area.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Should I try DIY first?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
The process
You don’t need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the work takes anything from a few hours to a full day, depending on how many windows for a typical job. Somewhere like Stedham 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.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- Keep children and pets away from the work area
- Clear the area around the work
- Let us know about parking restrictions
Get a quote
Every job is quoted individually, so start by telling us what you need. Simply call 0345 464 0079 or send us an email and describe the job, and pictures are welcome.
Advice
Sand mastic in Stedham: local notes
Historic houses like Cowdray House (about 1.8 miles east) are a reminder that the area around Stedham has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among 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 The Parish Church of St James, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Stedham is about 7 miles east of Petersfield, in West Sussex. Homes, rented property, offices and hotels in Stedham is covered for sand mastic, old or new, large or small. Every job comes with our one-year guarantee. Our area takes in 371 places across West Sussex, from the larger towns to small villages. You can also see our page for Portsmouth, about 19 miles away.
We cover every part of GU29 for sand mastic and the streets around it. Streets in the area include The Street, The Alley and Queens Street, all of which we cover. If you’re just outside Stedham, we cover Iping (1 mile north-west), Woolbeding (1 mile east), Minsted (1 mile south-west), Bepton Common (1 mile south-east) and Midhurst (1 mile south-east). Larger places within reach include Bognor Regis (15 miles south), Chichester (11 miles south), Emsworth (12 miles south-west), Storrington (15 miles east), Billingshurst (14 miles east) and Portfield (11 miles south).
Local landmarks in Stedham
We work in homes and buildings around Midhurst Rother College and the streets around them. Well-known places in the area include Midhurst Museum (1.6 miles east) and Lodsworth Castle (4.5 miles east). Not far away are Iping and Stedham Commons and Wheeler's Down.
What we cannot put right
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Decayed frames that need repair
- Cracked or broken glass
- Decisions on consent for listed homes
If you’re not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
What we seal
- Stone surrounds
- Brick reveals
- Timber door frames
- Tenement windows
- Period & listed homes
- Sash and case windows
Quotes for sand mastic in Stedham
Every job gets its own quote. This is what makes a difference:
- How many areas need sealing
- The type of sealant required
- The number and length of the joints
- Whether old sealant or filler has to be cut out
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Helping us quote
Photos help, but a description is a good start. Please mention:
- The address or postcode of the job
- The type of property
- Pictures of the joints, sent by email
- Any access issues, like height or stairs
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, call 0345 464 0079 or send us an email.
How to look after the new joints
To keep the joints looking good and working properly:
- Have rotten timber repaired before new mastic goes in
- Check with your local planning authority if your home is listed
- Avoid heavy scraping on the mastic joint
- Keep sills and gutters clear so water drains away
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
Surface by surface
Timber door frames
Door frames get knocked and soaked and the mastic can crack early. It’s renewed by hand.
Brick reveals
Sand mastic is also used where timber frames meet brick. It suits older brickwork.