Surrey · England
Sand mastic for sash & case windows in Thorpe Green, Surrey
Sand mastic across Thorpe Green and nearby, with old sealant always removed completely.
- Mastic dropping out of the joint
- Mastic that needs renewing before redecorating
- Cracked mastic round a front door frame
Sand mastic in Thorpe Green, done properly
If your home is listed or in a conservation area, check with your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. If you have a silicone bead on a sash window that spoils the look and cement or filler used on old window joints that has cracked, we can put it right, whatever the surface.
Homes in small places like Thorpe Green often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
A 12-month guarantee comes as standard.
- Where
- Thorpe Green (GU25, TW20)
- Region
- Surrey
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Do you need sand mastic in Thorpe Green?
Most of it is simply age. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
Common reasons people contact us are:
- A silicone bead on a sash window that spoils the look
- Mastic round period door frames that has failed
- Patchy fillers round a sash window
- Window mastic to renew ahead of painting
Schools such as Thorpe CofE Aided Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- How the surfaces are prepared before sealing
- Whether you can choose the colour
- What the quote includes, VAT included or not
- What guarantee comes with the work
The process
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. It normally takes anything from a few hours to a full day, depending on how many windows. In a small place like Thorpe Green, access is generally the main thing to plan. 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.
- We pack any deep voids first.
- 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
- For indoor joints, keep the area dry beforehand if you can
- Clear items away from the joints we’re working on
- Mention if the joints have been sealed before
Get a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Related advice
Why it’s worth doing now in Thorpe Green
Not every filler suits an old window surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. Around Thorpe Green, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or email us and we will talk you through it.
Why book with us
- Every job guaranteed for a year
- 180+ five-star Google reviews
- An ARBOMaster approved applicator
- We never seal over old sealant
Take a look at how sealant jobs are priced or customer reviews.
Questions from Thorpe Green
Can you do sand mastic in Thorpe Green?
Yes, Thorpe Green is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job.
Will you come out to Thorpe Green?
Yes. Thorpe Green is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do I need permission for sand mastic on a listed building?
Checking first is sensible. Your local planning authority can say if consent is needed for listed or conservation-area properties.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Can tenants book the work?
Yes. Ask your landlord first, and we can send them the quote if that helps.
How long does the job take?
It depends on the size of the job, but most jobs take a few hours per window, depending on the condition of the joints. We will tell you when we quote.
Do you do commercial work?
Yes. We have worked for hotels, offices and other businesses and we are fully insured.
Quotes for sand mastic in Thorpe Green
The price is agreed before any work begins. It’s based on:
- The number and length of the joints
- Any mould that needs treating
- How many areas need sealing
- The old material and how stubborn it is
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What we need to know
What to tell us when you ask for a quote:
- Where the job is, and your postcode
- Any previous sealing or DIY work
- How many joints, rooms or windows are involved
- If it’s domestic, commercial or a hotel
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we’ll explain what’s involved and give you a clear quote.
Should I try it myself first?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Looking after it afterwards
Looking after new joints is easy:
- Sort the mastic before the decorators arrive
- Leave the new mastic unpainted
- Look over the window mastic once a year
- Find out about consent before window work on a listed home
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
Sand mastic in Thorpe Green: local notes
Historic houses like Botleys Mansion (about 2.1 miles south) are a reminder that the area around Thorpe 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. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Virginia Water station? Then 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 St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Thorpe Green is about 2 miles south of Egham, in Surrey. Across the GU25 area, we cover sand mastic for homes and businesses. Thorpe Green is one of 395 places in Surrey we cover. You can also see our page for Reading, about 19 miles away.
Work in GU25 and TW20 is quoted and booked the same way as anywhere else. Streets in the area include Green Road and Sandhills Lane, all of which we cover. We also cover the places around Thorpe Green: Thorpe (1 mile north-east), Stroude (1 mile north-west), Virginia Water (1 mile west), Egham Hythe (2 miles north-east) and Egham (2 miles north). Within a short drive, we also cover Guildford (11 miles south), Woking (6 miles south), Camberley (9 miles south-west), Epsom (13 miles east), Ewell (13 miles east) and Walton-on-Thames (6 miles east).
Landmarks near Thorpe Green
Around Thorpe Green, our work takes us to homes and buildings near Riverside Walk, Salesian School and Rose And Crown Public House. The closest station to Thorpe Green is Virginia Water station, about 0.8 miles west of the centre. Other landmarks nearby include St. Peter's Hospital (2 miles south-east) and Spelthorne Museum (2.4 miles north-east). Green spaces nearby include Gracious Pond and St Ann's Hill.
Different surfaces, different methods
Period and listed homes
Period homes look their best with traditional materials.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It gives a traditional finish.