Kent · England
Sand mastic for sash & case windows in Eynsford, Kent
Sand mastic for Eynsford, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Patchy fillers round a sash window
- Tired mastic found when preparing windows for paint
- Crumbling sand mastic round a window
FAQs for Eynsford
Can you do sand mastic in Eynsford?
Yes. We work across London and the South East, and Eynsford is part of that. You can ring 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll send you a clear quote.
Will you come out to Eynsford?
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 work on commercial sites?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
Is it messy?
No. We protect the surfaces around the joints, and we tidy up before we go.
What guarantee comes with the work?
Every job comes with our one-year guarantee, and we’re fully insured.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll explain our choice.
Where are you based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Can you seal over the old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
Sand mastic for homes and businesses in Eynsford
Our applicators renew the sand mastic around sash and case windows and doors set in stone or brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. We work on stone surrounds, sash and case windows and brick reveals, and people most often call us about old cement repairs round a window that have failed and tired mastic found when preparing windows for paint.
Around Eynsford, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Eynsford (DA4)
- Region
- Kent
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Sand mastic in Eynsford: local notes
With historic houses such as Lullingstone Castle (about 1 mile south-west) nearby, there’s older building stock in the area around Eynsford as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of 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 Eynsford station, older sash windows in a rental need their mastic kept sound to keep the weather out. For an older house near a landmark such as Church of Saint Martin, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Eynsford is about 5 miles east of Orpington, in Kent. Anywhere in DA4, we cover sand mastic for homes and businesses. Across Kent, we cover 922 places, and Eynsford is one of them. You can also see our page for London, roughly 16 miles from Eynsford.
Work in DA4 works the same way as everywhere else we cover. Streets in the area include Station Road, High Street and Edwards Court. Nearby, we also carry out sand mastic in Farningham (1 mile north-east), Maplescombe (1 mile south-east), Horton Kirby (2 miles north-east), East Hill (2 miles south-east) and Speed Gate (2 miles east). We also work in nearby towns such as Maidstone (15 miles south-east), Dartford (5 miles north), Sevenoaks (6 miles south), Gravesend (8 miles north-east), Tonbridge (12 miles south) and Northfleet (7 miles north-east).
Near you in Eynsford
Locally, jobs take us to homes and businesses close to The Malt Shovel pub. Eynsford’s nearest station is Eynsford station, about 0.5 miles south-west. Nearby you will also find Eynsford Castle (within half a mile north) and Darenth Park Hospital (5.1 miles north-east). For a walk, there’s The Warren.
What affects the cost of sand mastic
Call for a quick quote. The main things that affect it are:
- The number and length of the joints
- The old material and how stubborn it is
- Access and height
- When we can work, for business premises
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, ring 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- What’s wrong with the joints now
- Photos by email, if that’s easy
- Any access issues, like height or stairs
- The rough size of the job
Want a quote for sand mastic? Please ring 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before we start.
Why deal with it now?
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and finishes neatly against the masonry. Around Eynsford, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost depends on the amount of work, how much old material has to come out and access to the work. We give a clear quote before we start, so you know where you stand.
What you get with us
- Experience in homes, commercial sites and hotels
- Anti-fungal silicone where joints get wet
- 4.9 on Google from 180+ five-star reviews
- We never seal over old sealant
See how sealant jobs are priced and our reviews.
For landlords and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
The process
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes a few hours per window, depending on the condition of the joints, including the tidy-up. In a small place like Eynsford, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we agree which joints need doing.
- 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.
- The surface is finished to suit the stone or brick.
How to prepare
- Mention any sign-in or site rules at work premises
- Move anything stored near the joints
- Keep children and pets away from the work area
Getting a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or email us.
Read more
What sealant work can’t fix
A few problems are outside what sealant work can do:
- Putty and glazing repairs
- Sashes that rattle, stick or will not open
- Timber that has rotted
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Brick reveals
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Tenement windows
- Timber door frames
Nearby places to Eynsford
What else we do in Eynsford
What we are called out for in Eynsford
Some old mastic was never deep enough. A thin layer does not hold well so we make sure the new mastic is the right thickness.
Any of these means the joints need attention:
- Old sand mastic that has cracked, crumbled or fallen out
- Open joints round the window box
- Draughts and rain around sash boxes
- Patchy fillers round a sash window
Managing a site like The Anthony Roper Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Before booking anyone
- The length of the guarantee
- How the colour is chosen
- Whether they’re fully insured
- Who turns up on the day
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Clear gutters so water does not pour onto the windows
- Have rotten timber repaired before new mastic goes in
- Ask us before painting near the mastic
- Find out about consent before window work on a listed home
Do not touch or press the mastic while it hardens. It skins over quickly, but takes longer to harden fully.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.