Surrey · England
Sand mastic for sash & case windows in Hamsey Green, Surrey
We cover Hamsey Green for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly.
- Wind and rain getting in round a sash window
- Mastic worn away on windows facing the weather
- Gaps between timber frames and stone or brick
About our sand mastic in Hamsey Green
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It’s a good fit for period properties, where modern sealant can look out of place. If you’re dealing with weathered mastic on the most exposed windows and mastic dropping out of the joint, we can help.
Somewhere as small as Hamsey Green, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Hamsey Green (CR6, CR2)
- Wider area
- Surrey
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Can I do it myself?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
What we cannot put right
Some problems need a builder, plumber or other trade rather than us:
- Damaged stone surrounds
- Decayed frames that need repair
- Planning or listed building consent (your local planning authority decides)
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Stone surrounds
- Brick reveals
- Period & listed homes
- Timber door frames
- Tenement windows
- Sash and case windows
Landlords, agents and businesses in Hamsey Green
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
We also work for property managers and facilities teams in Hamsey Green and across Surrey. Several sites can be quoted together.
What happens if it’s left?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. Older cottages and farmhouses around Hamsey Green can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why book with us
- We leave the area clean and tidy
- Sanitary silicone with an anti-fungal additive in wet areas
- A 12-month guarantee on all work
- An ARBOMaster approved applicator
How we quote for sand mastic
Your quote is based on your job. We take into account:
- Any mould that needs treating
- Access and height
- How many rooms, windows or areas are involved
- How much old sealant there is and how hard it is to remove
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Call for a quick quote and we’ll go through it with you.
What to tell us for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- The rough size of the job
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
- Photos by email, if that’s easy
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we will come back to you with a quote.
Do you need sand mastic in Hamsey Green?
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
Signs it’s time to call us include:
- Gaps between timber frames and stone or brick
- Gaps round a timber door in stone or brick
- A silicone bead on a sash window that spoils the look
- Old sand mastic that has cracked, crumbled or fallen out
For landlords with property near Upper Warlingham station, older sash windows in a rental need their mastic kept sound to keep the weather out.
What to look for in a quote
- Is the old sealant removed completely?
- How long the guarantee is
- How the colour is chosen
- Whether the sealant suits the joint
Windows and doors in Hamsey Green
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 Addington Palace (about 2.8 miles north) are a reminder that the area around Hamsey Green has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you live in an older home near St Antony, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you look after a building such as Hamsey Green Primary, larger buildings have plenty of frames, and the mastic around each one ages.
Hamsey Green is about 1 mile north of Warlingham, in Surrey. For sand mastic in and around Hamsey Green, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Surrey from our Crawley base. Our area takes in 395 places across Surrey, large and small. For nearby work, see our London page (13 miles or so).
We cover every part of the CR6 and CR2 postcode area for sand mastic. Local streets include Clyde Avenue, Crewe's Lane and Princes Avenue. We also cover the places around Hamsey Green: Warlingham (1 mile south), Whyteleafe (1 mile south-west), Chelsham (1 mile east), Sanderstead (1 mile north-west) and Farleigh (1 mile east). Further out, we also cover Epsom (9 miles west), Horley (11 miles south-west), Redhill (7 miles south-west), Ewell (9 miles west), Reigate (8 miles south-west) and Caterham (3 miles south-west).
Landmarks near Hamsey Green
Locally, jobs take us to homes and businesses close to Blanchman's Farm, The White Lion Public House and Warlingham School and the streets around them. For rail, the closest station is Upper Warlingham station, about 1 mile south-west of the centre. Other landmarks nearby include Warlingham Park Hospital (1.4 miles east) and East Surrey Museum (2.6 miles south). Not far away are South London Downs National Nature Reserve and Nore Hill.
Common questions in Hamsey Green
Do you cover smaller places like Hamsey Green?
Yes, smaller places are covered as well as towns. 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 Hamsey Green?
Yes. We work across London and the South East, and Hamsey Green is part of that. Just phone 0345 464 0079 or email us with a few details of the job.
Where is Mr Mastic based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Is it OK to seal over old sealant?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Will there be a smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme.
Can you match the sealant colour?
We will suggest a colour to suit the surroundings, from white and clear to greys and other shades. The product needed can limit the range.
Nearby places to Hamsey Green
Other services in Hamsey Green
How the visit works
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the job takes a few hours per window, depending on the condition of the joints in most cases. For a village or hamlet like Hamsey Green, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- Move anything stored near the joints
- Tell us if parking is tricky
- Tell us about any water getting in
Ask for a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work.