West Berkshire · England
Sand mastic for sash & case windows in Highclere, West Berkshire
Specialist sand mastic for Highclere: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Gaps round a timber door in stone or brick
- Failed mastic on an exposed elevation
- Gaps between timber frames and stone or brick
What we’re called out for in Highclere
Shallow joints are a common cause. Mastic that is too thin cracks and drops out so we make sure the new mastic is the right thickness.
Look out for any of the following:
- A silicone bead on a sash window that spoils the look
- Old cement repairs round a window that have failed
- Gaps between timber frames and stone or brick
- Failed mastic on an exposed elevation
For an older house near a landmark such as Church of St Michael Archangel, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- What preparation is included
- The length of the guarantee
- What the quote includes, VAT included or not
- What product goes in the joint
About our sand mastic in Highclere
Across Highclere, we renew sand mastic around sash and case windows. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. We are often asked to deal with gaps where the frame meets the masonry and draughty sash windows at the surround, across timber door frames, sash and case windows and tenement windows.
Homes in small places like Highclere often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Highclere (RG20)
- Wider area
- West Berkshire
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Highclere questions
Can you help a landlord with a rental near Newbury station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can call 0345 464 0079 or email us with the details for a clear quote.
Can you do sand mastic in Highclere?
Yes, Highclere is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Can sand mastic be painted?
Traditional guidance is not to paint over sand mastic. If you are redecorating the window, ask us first and we will advise.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Where is Mr Mastic based?
We work from Crawley. We cover Highclere and the rest of West Berkshire, along with the rest of our area.
What guarantee comes with the work?
Our 12-month guarantee covers every job.
Is sand mastic better than silicone for my windows?
It depends on the window. On many period windows, sand mastic looks right and suits the building and newer frames normally get a flexible sealant.
What happens if it’s left?
If you are redecorating, renew the mastic first. Paint over cracked mastic will not stop the gaps and traditional guidance is to leave the new mastic unpainted. Where a wall is exposed, as many are in small places like Highclere, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we’ll explain the quote if you ask.
Why us?
- ARBOMaster approved applicator
- Full insurance on every job
- Anti-fungal silicone where joints get wet
- One-year guarantee on every job
Take a look at our cost guide and customer reviews.
Honest limits
Before booking, it’s worth knowing the limits:
- Putty and glazing repairs
- Sashes that rattle, stick or won’t open
- Masonry that needs repairing
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before you book.
What we seal
- Sash and case windows
- Timber door frames
- Period & listed homes
- Stone surrounds
- Tenement windows
- Brick reveals
Work for landlords, hotels and businesses
For anyone letting property in or around Highclere, several properties can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
We work for landlords and agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
What affects the quote in Highclere
For a quick quote, just ask. The main things that affect it are:
- The type of sealant required
- Whether the work is at height
- Any working-time requirements on site
- How much there is to do
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
What we need to know
When you call or email, these details help:
- Access, such as stairs, a lift or height
- Where the job is, and your postcode
- The type of property
- If someone has resealed it before
Every job is quoted individually. Just ring 0345 464 0079 or email us with the details.
Places near Highclere
More services for Highclere
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What sand mastic looks like in Highclere
With historic houses such as Highclere Castle (about 1.4 miles south-east) nearby, there’s older building stock in the area around Highclere 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 is traditional sand mastic. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Newbury station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. Schools such as Woolton Hill Junior School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Highclere is about 4 miles south-west of Newbury, in West Berkshire. Highclere gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across West Berkshire, we cover 155 places, Highclere among them. For nearby work, see our Reading page.
Here we cover the RG20 postcode area for sand mastic. Local streets include Tubb's Lane, Arkwright Close and Coombe Corner, all of which we cover. We also cover Penwood (1 mile north-east), Woolton Hill (1 mile north), Hollington (1 mile south-west), Enborne Row (2 miles north) and Wash Water (2 miles north-east). Further out, we also cover Newbury (4 miles north-east), Thatcham (6 miles north-east), Burghfield Common (14 miles east), Speenhamland (5 miles north-east), Hungerford (8 miles north-west) and Lambourn (13 miles north-west).
Local landmarks in Highclere
Locally, jobs take us to homes and businesses close to The Clere School, among other places. For rail, the closest station is Newbury station, roughly 4.3 miles north-east of the centre. Nearby you’ll also find Newbury Castle (3.9 miles north) and West Berkshire Community Hospital (5.5 miles north-east). Green spaces nearby include Audrey's Meadow and Sidown Hill.
What happens on the day
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes a few hours per window, depending on the condition of the joints and we leave things clean and tidy. Somewhere as small as Highclere, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
For a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.