Hampshire · England
Filmore Hill Sand Mastic
Sand mastic for Filmore Hill, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Mastic that needs renewing before redecorating
- Weathered mastic on the most exposed windows
- Old sand mastic that has cracked, crumbled or fallen out
What happens if it’s left?
New sash windows are a major, costly change, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. Older cottages and farmhouses around Filmore Hill can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
What you get with us
- Quality sealants from Arbo and Everbuild
- Full insurance on every job
- Approved under the ARBOMaster scheme
- Any old sealant cut out fully, not covered over
Read our cost guide and our reviews.
About our sand mastic in Filmore Hill
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. If you have cement or filler used on old window joints that has cracked and mastic dropping out of the joint, we can put it right, on tenement windows, stone surrounds and period & listed homes alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Filmore Hill is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Our work is backed for twelve months.
- Place
- Filmore Hill (GU34)
- Region
- Hampshire
- Cover
- One year on every job
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Filmore Hill: your questions answered
Can you do sand mastic in Filmore Hill?
Yes, Filmore Hill is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we will give you a clear price.
Will you come out to Filmore Hill?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Is consent needed for window work on a listed home?
Speak to your local planning authority before work starts. Like-for-like sand mastic is often the preferred finish, but they decide.
Will there be a smell?
There can be a smell while the sealant cures. Ventilation helps.
Should I use sand mastic or silicone?
We will help you decide. Sand mastic suits many period homes, and modern sealants suit newer frames.
How long does the job take?
A typical job takes a few hours for a single window, longer for several. We will confirm how long when we quote.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
Looking after it afterwards
Aftercare is simple:
- Ask a joiner to look at soft timber first
- Inspect the joints round the windows every year or so
- Keep sills and gutters clear so water drains away
- Avoid patching sand mastic with silicone
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
What happens on the day
There isn’t much for you to do on the day. Point us to the joints and we’ll get on with it. The job generally takes anything from a few hours to a full day, depending on how many windows, including the tidy-up. In a small place like Filmore Hill, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
- Clear the area around the work
Ask for a quote
If you’re in Filmore Hill and need sand mastic, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
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What affects the cost of sand mastic
For a quick quote, just ask. The main things that affect it are:
- Working hours on commercial sites
- How many rooms, windows or areas are involved
- The old material and how stubborn it is
- The number and length of the joints
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
Before you ask for a quote, have a think about:
- What the problem is, such as mould, gaps, leaks or cracking
- A few photos by email, if you can
- The address or postcode of the job
- Whether it has been sealed before
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Frames and glazing around Filmore Hill
Historic houses like Hinton Ampner House (about 4.2 miles west) are a reminder that the area around Filmore Hill has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. 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.
Around Filmore Hill, as everywhere, sand mastic is only as good as the preparation behind it.
Filmore Hill is about 6 miles north-west of Petersfield, in Hampshire. Homes, rented property, offices and hotels in Filmore Hill is covered for sand mastic. The work is guaranteed for a year. Across Hampshire, we cover 683 places, Filmore Hill among them. Our Portsmouth page covers work nearby, about 16 miles away.
Work in GU34 works the same way as everywhere else we cover. Nearby, we also carry out sand mastic in Bailey Green (1 mile east), Privett (1 mile east), West Tisted (1 mile north-west), Monkwood (2 miles north) and West Meon (2 miles south-west). We also work in nearby towns such as Winchester (11 miles west), Havant (13 miles south), Eastleigh (14 miles west), Fareham (14 miles south-west), Horndean (9 miles south) and Chandler's Ford (15 miles west).
Around Filmore Hill
Nearby you will also find Petersfield Community Hospital (5.6 miles south-east). Not far away are Shutts Copse and Pidham Hill.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
How the job changes by surface
Period and listed homes
Materials matter on listed and conservation-area homes. Like-for-like sand mastic is normally favoured.
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. We shape it by hand to follow the stone.
When to call us in Filmore Hill
Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.
Keep an eye out for any of the following:
- Draughty sash windows at the surround
- Failed mastic on an exposed elevation
- A silicone bead on a sash window that spoils the look
- Cracked mastic round a front door frame
For an older house near a landmark such as Holy Trinity Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What to look for in a quote
- Whether all the old sealant comes out first
- What preparation is included
- Whether you can choose the colour
- What product goes in the joint