West Berkshire · England
Sand mastic for sash & case windows in Upper Lambourn, West Berkshire
Specialist sand mastic for Upper Lambourn: careful preparation, the right product and tidy work. Call for a quick quote.
- Old cement repairs round a window that have failed
- Draughts and rain around sash boxes
- Mastic dropping out of the joint
Landlord and commercial work in Upper Lambourn
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Sand mastic in Upper Lambourn, done properly
Silicone on a period window often looks wrong and isn’t always the right material. Sand mastic is the traditional choice, and we can replace one with the other. We’re often asked to deal with cracked mastic round a front door frame and mastic worn away on windows facing the weather, on period & listed homes, brick reveals and sash and case windows.
Somewhere as small as Upper Lambourn, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
A 12-month guarantee comes as standard, so you are not left on your own once the job is done.
- Where
- Upper Lambourn (RG17)
- Region
- West Berkshire
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Upper Lambourn
More services for Upper Lambourn
Should I try it myself first?
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. All the old material has to come out first.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What happens on the day
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours per window, depending on the condition of the joints. Somewhere like Upper Lambourn needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each surround and agreeing the joints to renew.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic isn’t too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Let us know about parking restrictions
- Keep pets and children clear of the area while we work
- On commercial sites, let us know about site rules
Getting a quote
For sand mastic in Upper Lambourn, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Related advice
When to call us in Upper Lambourn
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
The most common problems we see are:
- Mastic round period door frames that has failed
- Draughty sash windows at the surround
- Open joints round the window box
- Weathered mastic on the most exposed windows
Historic houses such as Ashdown House, about 2.1 miles west, show how far back building around Upper Lambourn goes, and older homes nearby need a sealant that suits their walls.
What to look for in a quote
- What happens if the job turns out different
- How much experience the applicator has
- What the cure time is
- How the joint is cleaned and prepared
Upper Lambourn: your questions answered
Is there a guarantee on sand mastic in Upper Lambourn?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Can you do sand mastic in Upper Lambourn?
Yes. We work across London and the South East, and Upper Lambourn is part of that. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
How long does sand mastic take to go off?
It skins over fairly quickly but takes longer to harden fully. We’ll explain what to expect before we leave.
What does sand mastic cost?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or send us an email and let us know what needs doing and where.
Do you offer different sealant colours?
We will suggest a colour to suit the surroundings, from white and clear to greys and other shades. The product needed can limit the range.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Upper Lambourn and the rest of West Berkshire.
Which is right for my windows, sand mastic or modern sealant?
It depends on the window. Period windows in stone or brick normally suit sand mastic, while modern frames normally get a flexible sealant.
Are you fully insured?
Yes. We are fully insured.
What the job involves on each surface
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. We rake it out and renew it.
Windows and doors in Upper Lambourn
With historic houses such as Ashdown House (about 2.1 miles west) nearby, there’s older building stock in the area around Upper Lambourn 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. 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.
Around Upper Lambourn, as everywhere, sand mastic is only as good as the preparation behind it.
Upper Lambourn is about 7 miles south-west of Wantage, in West Berkshire. Wherever you are in the RG17 postcode area, we cover sand mastic for homes and businesses. Our West Berkshire coverage runs to 155 places, Upper Lambourn among them. Oxford is on our list too, about 21 miles from Upper Lambourn.
We work across the RG17 postcode area for sand mastic and the streets around it. If you need sand mastic at a property on High Street and Maddle Road or a nearby road, we can help. Neighbouring places we cover for sand mastic include Lambourn (1 mile south-east), Sheepdrove (2 miles east), Woolstone (5 miles north), Kingston Lisle (5 miles north) and Westcot (5 miles north). Within a short drive, we also cover Newbury (13 miles south-east), Thatcham (15 miles south-east), Speenhamland (13 miles south-east), Hungerford (8 miles south), Shaw (13 miles south-east) and Wash Common (14 miles south-east).
Near you in Upper Lambourn
Around Upper Lambourn, our work takes us to homes and buildings near The Malt Shovel pub, among other places. Green spaces nearby include Seven Barrows and Rams Hill.
How we quote for sand mastic
The quote reflects the job in front of us. We take into account:
- The number of rooms or windows
- The number and length of the joints
- Whether old sealant or filler has to be cut out
- Any working-time requirements on site
What you pay reflects the work, not guesswork. That’s why we ask about the job first and give you a clear price before work begins.
What we need to know
To make quoting easier, let us know:
- The problem you’ve noticed
- Photos by email, if that is easy
- The address or postcode of the job
- Whether it has been sealed before
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details.
Aftercare tips
To keep the joints looking good and working properly:
- Keep modern sealant off the mastic
- Ask us before painting near the mastic
- Have rotten timber repaired before new mastic goes in
- Keep sills and gutters clear so water drains away
Check the mastic when you check the paintwork. Small cracks are easier to deal with early.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.