Oxfordshire · England
Sand Mastic in Tidmarsh
Problem with your window and door surrounds in Tidmarsh? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Wind and rain getting in round a sash window
- Mastic that needs renewing before redecorating
- Weathered mastic on the most exposed windows
How we handle sand mastic in Tidmarsh
A silicone bead around a sash window can look out of place and is not always the right material. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. Typical jobs include failed mastic on an exposed elevation and old cement repairs round a window that have failed, across timber door frames, stone surrounds and brick reveals.
Outdoor sealant needs dry, clean surfaces, so work on frames around Tidmarsh is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Whatever the size of the job, it’s backed by our 12-month guarantee in Tidmarsh and across Oxfordshire.
- Place
- Tidmarsh (RG8)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
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.
Common problems we fix in Tidmarsh
Over the years, sand mastic weathers. It hardens, cracks and starts to come away from the frame or the masonry.
Any of these means the joints need attention:
- Open joints round the window box
- Mastic round period door frames that has failed
- Patchy fillers round a sash window
- Wind and rain getting in round a sash window
Managing a site like Pangbourne Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- Which colour the sealant will be
- Who turns up on the day
- Are they insured?
- How the surfaces are prepared before sealing
Leave it or put it right?
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. Around Tidmarsh, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What you get with us
- Anti-fungal silicone where joints get wet
- Domestic, commercial and hotel work
- 20+ years of sealant experience
- Every job guaranteed for a year
Take a look at what affects the cost or customer reviews.
Frames and glazing around Tidmarsh
Historic houses like Mapledurham House (about 2.5 miles north-east) are a reminder that the area around Tidmarsh has older buildings as well as new. 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. 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.
Rented homes near Pangbourne station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. Homes close to Church of St Laurence include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in.
Tidmarsh is about 5 miles west of Reading, in Oxfordshire. From the centre of Tidmarsh to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 443 places in Oxfordshire are on our list.
Every address in RG8 is within our area for sand mastic. Streets in the area include Strachey Close and Tidmarsh Lane, and we cover them all. Nearby, we also carry out sand mastic in Sulham (1 mile east), Pangbourne (1 mile north), Whitchurch-on-Thames (1 mile north), Little Heath (2 miles south-east) and Englefield (2 miles south). Further out, we also cover Didcot (12 miles north-west), Henley-on-Thames (9 miles north-east), Benson (10 miles north), Wallingford (9 miles north), Great Western Park (12 miles north-west) and Watlington (13 miles north).
Near you in Tidmarsh
Around Tidmarsh, our work takes us to homes and buildings near Denefield School and The Cross Keys pub and the streets around them. The nearest railway station is Pangbourne station, roughly 1.1 miles north. Nearby you’ll also find Thames Valley Police Museum (3.5 miles south) and Battle Hospital (4 miles east). Green spaces nearby include Moor Copse Nature Reserve and Hosehill Lake.
What affects the cost of sand mastic
Jobs vary more than people expect. The main factors:
- The type of sealant required
- Whether the work is at height
- How many rooms, windows or areas are involved
- Whether there’s mould to deal with
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or drop us an email.
What to tell us for a quote
When you call or email, these details help:
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Look over the window mastic once a year
- Take care around the mastic when scraping paint
- Have rotten timber repaired before new mastic goes in
- Make sure water runs off the sill
Leave the new mastic unpainted, as traditional guidance advises. If you’re redecorating, ask us first.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens as more mastic falls out.
Tidmarsh questions
Will you come out to Tidmarsh?
Yes. Tidmarsh is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you cover Tidmarsh for sand mastic?
Yes, Tidmarsh is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear price.
Are you insured?
Yes. Mr Mastic is fully insured.
Will there be a smell?
There can be a smell while the sealant cures. Opening a window helps.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you don’t need to watch us work.
Can you quote for more than one area?
Yes, we can. More than one area can be quoted together.
Can you seal over the old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
How it works
You don’t need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the work takes a few hours for a single window, longer for several for a typical job. Somewhere like Tidmarsh needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- 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.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Mention any parking rules near the property
- Clear items away from the joints we are working on
Get a quote
We don’t publish a price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Related advice
Also in Tidmarsh
Honest limits
We will not take on work that won’t last, so here’s what sealant cannot put right:
- Cracked or broken glass
- Sashes that need overhauling
- Planning or listed building consent (your local planning authority decides)
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Timber door frames
- Period & listed homes
- Sash and case windows
- Stone surrounds
- Brick reveals
- Tenement windows