West Berkshire · England
Sand mastic for sash & case windows in Compton, West Berkshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Compton, with a one-year guarantee on every job. Call for a quick quote.
- Crumbling sand mastic round a window
- Cracked mastic round a front door frame
- A silicone bead on a sash window that spoils the look
About our sand mastic in Compton
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. If you have silicone on a period window that looks wrong and mastic round period door frames that has failed, we can put it right.
Homes in small places like Compton 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.
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.
- Place
- Compton (RG20)
- Wider area
- West Berkshire
- Cover
- One year on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
An open joint round the frame lets weather in. Water can get to the frame and the masonry so renewing it early protects the window. Older cottages and farmhouses around Compton can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, phone 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why Compton clients choose us
- Rated 4.9 stars on Google
- Every job guaranteed for a year
- Full insurance on every job
- Sanitary silicone with an anti-fungal additive in wet areas
Read our cost guide and what customers say.
How it works
When we arrive, we start by going over the job with you, so you know exactly what we’re doing. We protect the surfaces around the joints before any work starts. The work generally takes a few hours for a single window, longer for several. Somewhere as small as Compton, access is often the only tricky part. 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.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
How to prepare
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
How to get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Read more
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Make sure water runs off the sill
- Find out about consent before window work on a listed home
- Plan mastic work ahead of painting
- Avoid patching sand mastic with silicone
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
What the job involves on each surface
Period and listed homes
A traditional finish suits a period property, and sand mastic is one of them.
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
What sand mastic looks like in Compton
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.
Homes close to Church of St Mary and St Nicholas include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Compton is about 7 miles south of Didcot, in West Berkshire. Compton gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Compton is one of 155 towns and villages in West Berkshire we cover for sand mastic. Reading is on our list too, about 13 miles from Compton.
Our applicators cover all of the RG20 postcode area for sand mastic. That includes homes and businesses on High Street, Lowbury Gardens and Cheap Street. We also cover East Ilsley (2 miles north-west), Aldworth (2 miles east), Woodway (3 miles north), Blewbury (4 miles north) and Chilton (4 miles north-west). Larger places within reach include Newbury (9 miles south), Thatcham (8 miles south), Burghfield Common (11 miles south-east), Speenhamland (8 miles south-west), Hungerford (14 miles south-west) and Spencers Wood (15 miles south-east).
Landmarks near Compton
Typical jobs here are in homes near The Downs School and The Swan pub. Other landmarks nearby include Hampstead Norris Castle (2.5 miles south). Not far away are Churn Hill.
Your questions about sand mastic in Compton
Is there a guarantee on sand mastic in Compton?
Every job comes with our 12-month guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Is Compton within the area you cover?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we will advise.
How long will you be here?
As a guide, most jobs take anything from a few hours to a full day, depending on how many windows. Bigger jobs take longer.
Do the sealants smell?
Some sealants have a smell while they cure. Opening a window helps.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Do you offer different sealant colours?
We’ll suggest a colour to suit the surroundings. The choice depends on the product the joint needs.
DIY versus a professional finish
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Do you need sand mastic in Compton?
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows.
The most common problems we see are:
- Mastic round period door frames that has failed
- Weathered mastic on the most exposed windows
- Gaps where the frame meets the masonry
- Window mastic to renew ahead of painting
If you look after a building such as Compton C.E. Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Before booking anyone
- Are they insured?
- What preparation is included
- Is the old sealant removed completely?
- What happens if the job turns out different
Also near Compton
More services for Compton
For landlords 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.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.