Hampshire · England
Sand mastic for sash & case windows in Rowlands Castle, Hampshire
Our applicators work in Rowlands Castle on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Mastic round period door frames that has failed
- Gaps where the frame meets the masonry
- Draughts and rain around sash boxes
How we handle sand mastic in Rowlands Castle
A silicone bead around a sash window can look out of place and does not suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. If you’re dealing with weathered mastic on the most exposed windows and silicone on a period window that looks wrong, we can help, whatever the surface.
Many houses in smaller places like Rowlands Castle have conservatories, garden rooms or patio doors. Those joints need the same attention as the main windows, and any older timber or sash windows need a sealant that suits them.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Where
- Rowlands Castle (PO9)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Quotes for sand mastic in Rowlands Castle
Your quote is based on your job. We look at:
- When we can work, for business premises
- Which sealant suits the joint
- Whether the work is at height
- The old material and how stubborn it is
The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Whether it’s a home or a business
- Pictures of the joints, sent by email
- Whether it has been sealed before
- Access, such as stairs, a lift or height
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, call 0345 464 0079 or email us.
Nearby places to Rowlands Castle
What else we do in Rowlands Castle
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 per window, depending on the condition of the joints for a typical job. A visit to Rowlands Castle is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- Try not to wet indoor joints just before the visit
- For business premises, tell us about site rules or sign-in
- Let us know if you’ve seen damp or leaks
Getting a quote
There’s no standard price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.
Read more
What the job involves on each surface
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Sort the mastic before the decorators arrive
- Keep modern sealant off the mastic
- Clear gutters so water does not pour onto the windows
- Ask a joiner to look at soft timber first
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
What we’re called out for in Rowlands Castle
Water gets into small cracks in the mastic and loosens it further. Windows facing the weather tend to go first.
Common reasons people contact us are:
- Old sand mastic that has cracked, crumbled or fallen out
- Draughty sash windows at the surround
- Gaps between timber frames and stone or brick
- Modern sealant on a period surround
Managing a site like Havant Academy? Then larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- Are they insured?
- How the surfaces are prepared before sealing
- How hidden problems are handled
- Who does the work, and how experienced they are
Rowlands Castle questions
Does living near the coast affect sand mastic in Rowlands Castle?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
Can you help a landlord with a rental near Rowlands Castle station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
How long will you be here?
As a guide, most jobs take a few hours for a single window, longer for several. Larger jobs naturally take longer, and we’ll tell you how long to expect.
When will the new mastic be hard?
Not straight away. The skin forms first, and the full set comes later, and we will tell you what to expect.
How much does sand mastic cost in Rowlands Castle?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can you match the sealant colour?
Yes. Sealants come in white, clear, grey and other colours for many products, and we will agree it with you first.
Where do you work from?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Why it’s worth doing now in Rowlands Castle
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in and new mastic seals them. Homes in smaller places like Rowlands Castle can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why book with us
- We never seal over old sealant
- We are fully insured
- Experience in homes, commercial sites and hotels
- More than 20 years in sealant work
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Windows and doors in Rowlands Castle
Rowlands Castle is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around older windows and doors, especially on the side facing the sea. London and the South East are among the drier parts 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 Rowlands Castle station, any sash windows need sound mastic to keep draughts and rain out. If you live in an older home near The Church on the Green, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Rowlands Castle is about 2 miles north-east of Havant, in Hampshire. If you need sand mastic in Rowlands Castle, it’s easy to get a quote: please call 0345 464 0079 or email us. We’re based in Crawley and cover Hampshire, Rowlands Castle included. Rowlands Castle is one of 683 towns and villages in Hampshire we cover for sand mastic. There’s also a page for Portsmouth, roughly 7 miles from Rowlands Castle.
Every address in PO9 is covered for sand mastic. You’ll find streets such as Stansted Close, College Close and Redhill Road, and we cover them all. Other places close to Rowlands Castle include Durrants (1 mile south), Leigh Park (2 miles south-west), Havant (2 miles south-west), Denvilles (2 miles south) and Westbourne (2 miles south-east). We also work in nearby towns such as Gosport (10 miles south-west), Fareham (10 miles west), Hedge End (15 miles west), Waterlooville (3 miles west), Petersfield (8 miles north) and Purbrook (3 miles south-west).
What’s near Rowlands Castle
We work in homes and buildings around Robin Hood Inn and the streets around them. There’s a railway station in Rowlands Castle itself: Rowlands Castle station. Well-known places in the area include Havant War Memorial Hospital (2.6 miles south-west) and Havant Museum (2.7 miles south). Open spaces near Rowlands Castle include Compton Down and Brook Meadow (Emsworth).