Wokingham · England
Sand mastic for sash & case windows in Newtown, Wokingham
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Newtown and across Wokingham. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps between timber frames and stone or brick
- Tired mastic found when preparing windows for paint
- Cracked mastic round a front door frame
FAQs for Newtown
Do you work for landlords with property near Reading station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Do you cover Newtown for sand mastic?
Yes. We work across London and the South East, and Newtown is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we’ll give you a clear quote.
Is there any odour?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Where is Mr Mastic based?
We’re based in Crawley, and we cover South East England, London and all of Scotland.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or email us.
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 in Newtown, done properly
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted, so ask us before you decorate. Common call-outs are for mastic dropping out of the joint and old cement repairs round a window that have failed, on timber door frames, stone surrounds and period & listed homes.
Around Newtown, conservatories, garden rooms and patio doors are often part of the house. Their glazing joints and frame seals are as much a part of the job as the windows, and any older timber or sash windows need a sealant that suits them.
You’re covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or drop us an email.
- Where
- Newtown (RG1, RG6, RG4)
- Region
- Wokingham
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What we are called out for in Newtown
Previous repairs in cement or silicone often trap water or crack away. They do not suit the joint and we normally remove them.
Common reasons people contact us are:
- Weathered mastic on the most exposed windows
- Cracked mastic round a front door frame
- Silicone on a period window that looks wrong
- Crumbling sand mastic round a window
If you live in an older home near St John and St Stephen, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- Are they insured?
- How the surfaces are prepared before sealing
- What guarantee comes with the work
- What the cure time is
What affects the cost of sand mastic
Every job gets its own quote. These are the things that affect it:
- The size of the job
- When we can work, for business premises
- Mould in or behind the old joints
- How easy the joints are to reach
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before any work starts.
Helping us quote
When you contact us, these details help:
- Where the property is
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- Any access issues, like height or stairs
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and send you a clear quote before any work starts.
What sand mastic looks like in Newtown
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Mapledurham House (about 4.3 miles north-west) nearby, there’s older building stock in the area around Newtown as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Schools such as New Town Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Reading station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Newtown is about 1 mile east of Reading, in Wokingham. Homes, rented property, offices and hotels in Newtown can book us for sand mastic. The work is guaranteed for a year. Newtown is one of 35 places in Wokingham where we work for sand mastic.
Postcode districts we cover here for sand mastic: RG1, RG6 and RG4. Streets in the area include Orts Road, Eldon Road and Amity Road, and we cover them all. Other places close to Newtown include Lower Caversham (1 mile north-west), Reading (1 mile west), Earley (2 miles south-east), Caversham (2 miles north-west) and Play Hatch (2 miles north). We also work in nearby towns such as Wokingham (5 miles south-east), Crowthorne (9 miles south-east), Winnersh (3 miles south-east), Woosehill (5 miles south-east), Emmbrook (5 miles south-east) and Twyford (4 miles north-east). As one of the bigger places in Wokingham, Newtown has every kind of property, from flats to offices.
What’s near Newtown
We work in homes and buildings around University of Reading library, Eldon Square and The Fisherman's Cottage pub, among other places. Other local landmarks include Bulmershe College (within half a mile west) and Maiden Erlegh School (0.6 miles south-east). For rail, the closest station is Reading station, about 1.1 miles west of the centre. Nearby you’ll also find The Oracle (1.1 miles west) and Royal Berkshire Hospital (0.6 miles south-west). Green spaces nearby include Sonning Hill and Fobney Island Wetland Reserve.
Leave it or put it right?
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and finishes neatly against the masonry. In an older home around Newtown, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we’ll explain what it covers.
What you get with us
- We leave the area clean and tidy
- A 12-month guarantee on all work
- Homes, businesses and hotels
- Quality sealants from Arbo and Everbuild
Read our cost guide and our reviews.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The process
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours per window, depending on the condition of the joints. For a job in Newtown, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- 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.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- Clear items away from the joints we are working on
- For indoor joints, keep the area dry beforehand if you can
- For business premises, tell us about site rules or sign-in
How to get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or email us.
Advice
What we can’t put right
We’ll always be straight with you, so here’s what sealant can’t fix:
- Decayed frames that need repair
- Sashes that need overhauling
- Planning or listed building consent (your local planning authority decides)
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before you book.
Where we work in Newtown
- Sash and case windows
- Brick reveals
- Period & listed homes
- Stone surrounds
- Tenement windows
- Timber door frames
Work for landlords, hotels and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Landlords and agents in Newtown can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.