Surrey · England
Sand Mastic in The Chart
Sand mastic in The Chart from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Draughty sash windows at the surround
- Cracked mastic round a front door frame
- Mastic that needs renewing before redecorating
Windows and doors in The Chart
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Chartwell (about 1.9 miles east) nearby, there’s older building stock in the area around The Chart as well as newer homes. 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.
For an older house near a landmark such as St Andrew's, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Rented homes near Hurst Green station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
The Chart is about 6 miles south-east of Caterham, in Surrey. Whether you are in the middle of The Chart or further out, sand mastic is available for homes and businesses alike. The Chart is one of 395 towns and villages in Surrey where we work for sand mastic. There’s also a page for Crawley, about 14 miles away.
We work across RH8 for sand mastic and the streets around it. If you need sand mastic at a property on Stoneleigh Road, St Andrews Way and Ridlands Lane or anywhere close by, we can help. We also cover the places around The Chart: Pains-Hill (1 mile west), Moorhouse Bank (1 mile north-east), Goodley Stock (1 mile east), Limpsfield (1 mile north-west) and Crockham Hill (1 mile south-east). Within a short drive, we also cover Epsom (15 miles north-west), Horley (10 miles south-west), Redhill (9 miles west), Ewell (15 miles north-west), Reigate (10 miles west) and Caterham (6 miles north-west).
Around The Chart
Typical jobs here are in homes near Carpenters Arms, Oxted School and Hazelwood School. The nearest railway station is Hurst Green station, roughly 1.6 miles west of the centre. A little further out are Tandridge Priory (0.6 miles north-west). Green spaces nearby include Botley Hill and Bay Pond.
Sand mastic in The Chart
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we’ll explain which is best for yours. If you have gaps between timber frames and stone or brick and mastic round period door frames that has failed, we can put it right, whatever the surface.
In a village or hamlet like The Chart, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Each job carries a 12-month guarantee, whatever its size.
- Where
- The Chart (RH8)
- Wider area
- Surrey
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Keeping the joints in good condition
Looking after new joints is easy:
- Look over the window mastic once a year
- Find out about consent before window work on a listed home
- Renew mastic before redecorating the windows
- Get any rot dealt with first
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
Different surfaces, different methods
Period and listed homes
Materials matter on listed and conservation-area homes. Sand mastic is often the preferred finish.
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Nearby places to The Chart
Other services in The Chart
What we do, step by step
On the day, we start by going over the job with you. Surfaces next to the work are protected before work begins. The work generally takes a few hours per window, depending on the condition of the joints. In a small place like The Chart, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each window surround and the condition of the joint.
- 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.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Try not to wet indoor joints just before the visit
- Tell us about any previous sealing or DIY attempts
Get a quote
For sand mastic in The Chart, phone 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Read more
Do you need sand mastic in The Chart?
Age is the main cause. Sand mastic is a maintenance item like any pointing, depending on exposure and upkeep.
The problems people generally mention when they call include:
- Mastic dropping out of the joint
- Open joints round the window box
- Cement or filler used on old window joints that has cracked
- Cracked mastic round a front door frame
Managing a site like Limpsfield CofE Infant School? Then its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- Who does the work, and how experienced they are
- How long the guarantee is
- Whether VAT is included
- How the surfaces are prepared before sealing
Landlord and commercial work in The Chart
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
What affects the quote in The Chart
The price is agreed before any work begins. It takes into account:
- Any mould that needs treating
- The amount of work
- The old material and how stubborn it is
- How many rooms, windows or areas are involved
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, call 0345 464 0079 or send us an email for an honest opinion and a quote.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
- How we’d reach the joints
- Roughly how big the job is
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
Questions from The Chart
Is The Chart within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you do sand mastic in The Chart?
Yes. We work across London and the South East, and The Chart is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
How long does sand mastic take to go off?
It skins over fairly quickly but takes longer to harden fully. We’ll tell you what to expect for your job.
Is it possible to take out silicone and use sand mastic instead?
In most cases. The silicone is cut out and the joint cleaned before the sand mastic goes in.
What does sand mastic cost?
It depends on the job, so we quote each one individually. To get one, phone 0345 464 0079 or email us and tell us what needs doing and where.
Where are you based?
We’re based in Crawley, and we cover South East England, London and all of Scotland.
I rent my home. Can I book you?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.