West Sussex · England
Graffham Sand Mastic
Sand mastic for Graffham, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Old sand mastic that has cracked, crumbled or fallen out
- Weathered mastic on the most exposed windows
- Patchy fillers round a sash window
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Sand mastic in Graffham, done properly
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant, and we will talk through which suits your home. Common call-outs are for cement or filler used on old window joints that has cracked and old sand mastic that has cracked, crumbled or fallen out, across brick reveals, tenement windows and sash and case windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Graffham is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Our work is backed for twelve months, in Graffham and everywhere else we cover.
- Location
- Graffham (GU28)
- Region
- West Sussex
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How the job changes by surface
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.
When to call us in Graffham
Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.
Signs it’s time to call us include:
- Old sand mastic that has cracked, crumbled or fallen out
- Draughty sash windows at the surround
- Gaps where the frame meets the masonry
- A silicone bead on a sash window that spoils the look
For an older house near a landmark such as The Parish Church of St Giles, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- What happens if they find a problem under the old sealant
- How the joint is cleaned and prepared
- Who does the work, and how experienced they are
- Whether VAT is included
Questions from Graffham
Is Graffham in your area for sand mastic?
Yes. We work across London and the South East, and Graffham is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear quote.
Is sand mastic in Graffham guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Do you work for letting agents?
Yes, regularly. We can quote for several properties at once.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
Should I use sand mastic or silicone?
We’ll help you decide. Sand mastic suits many period homes, and modern sealants suit newer frames.
Should I check with the council before work on a listed or conservation-area home?
Checking first is sensible. Your local planning authority can say if consent is needed for listed or conservation-area properties.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures.
The process
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for a single window, longer for several and we leave things clean and tidy. Somewhere as small as Graffham, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Tell us about any water getting in
- Mention if the joints have been sealed before
How to get a quote
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or drop us an email.
Related advice
Why it’s worth doing now in Graffham
Draughts round a sash window are not always the sashes. Gaps between the frame and the wall can be just as bad and new mastic seals them. In a small place like Graffham, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why choose Mr Mastic in Graffham
- Trusted Arbo and Everbuild sealants
- Experience in homes, commercial sites and hotels
- Anti-fungal sanitary silicone in wet areas
- We leave the area clean and tidy
Take a look at our cost guide or customer reviews.
Sand mastic in Graffham: local notes
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. Historic houses like Cowdray House (about 3.5 miles north-west) are a reminder that the area around Graffham has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Schools such as Graffham CofE Infant School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Graffham is about 9 miles north-east of Chichester, in West Sussex. Every kind of property in Graffham is covered for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our area takes in 371 places across West Sussex, from the larger towns to small villages. Portsmouth is on our list too, about 20 miles from Graffham.
Jobs for sand mastic in GU28 is quoted and booked the same way as anywhere else. Whether your property is on Guillods Cottages and St Giles Place or a nearby road, we can help. Close by, we work in East Lavington (1 mile south-east), Duncton (2 miles east), Selham (2 miles north), South Ambersham (2 miles north) and Rotherbridge (3 miles north-east). Within a short drive, we also cover Worthing (15 miles south-east), Bognor Regis (11 miles south), Chichester (9 miles south-west), Selsey (15 miles south), Littlehampton (11 miles south-east) and Emsworth (13 miles south-west).
Near you in Graffham
In Graffham, that means homes and buildings near The Woodman pub and the streets around them. Other landmarks nearby include Coultershaw Heritage Site (3.1 miles north-east) and Midhurst Community Hospital (3.9 miles north-west). Open spaces near Graffham include Levin Down and Graffham Common.
What sealant work cannot fix
Sealant isn’t the answer to every problem, and we’ll tell you before work begins. It will not solve:
- Sash cords, weights and draught-proofing of the sashes
- Cracked or broken glass
- Masonry that needs repairing
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly.
What we seal
- Stone surrounds
- Sash and case windows
- Period & listed homes
- Brick reveals
- Tenement windows
- Timber door frames
Places near Graffham
More services for Graffham
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Sort the mastic before the decorators arrive
- Get any rot dealt with first
- Ask us before painting near the mastic
- Inspect the joints round the windows every year or so
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Sound mastic protects the frame. Failed mastic lets water reach the timber and timber that stays wet can rot.