Hampshire · England
Sand mastic for sash & case windows in Oakley, Hampshire
Sand mastic for Oakley, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Silicone on a period window that looks wrong
- Patchy fillers round a sash window
- Mastic that needs renewing before redecorating
Sand mastic for homes and businesses in Oakley
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. We work on stone surrounds, tenement windows and brick reveals, and people most often call us about draughty sash windows at the surround and open joints round the window box.
Homes around Oakley range from older properties to newer houses, and their windows range just as widely. The right sealant depends on the frame and on what it sits in.
Every job comes with our one-year guarantee, wherever you are in Hampshire.
- Place
- Oakley (RG23)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
Timber door frames
Door frames get knocked and soaked and the mastic can crack early. We rake it out and renew it.
Leave it or put it right?
Draughts round a sash window are not always the sashes. Open mastic joints round the box can let air in and new mastic seals them. In an older home around Oakley, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
Why choose Mr Mastic in Oakley
- Old sealant always removed completely
- Rated 4.9 stars on Google
- Full insurance on every job
- Every job guaranteed for a year
Read how sealant jobs are priced and our reviews.
The process
The work is kept neat and contained to the area we’re working on, so you can get on with your day. The job normally takes a few hours per window, depending on the condition of the joints, and we explain the cure time before we leave. A visit to Oakley is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- 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.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Tell us if parking is tricky
- Mention if the joints have been sealed before
- Let us know about stairs, lifts or work at height
Get a quote
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Related advice
Can I do it myself?
If you’re set on DIY, put the effort into 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.
Also near Oakley
More services for Oakley
Honest limits
A few problems are outside what sealant work can do:
- Whether work needs listed building consent
- Cracked or broken glass
- Crumbling stone or brickwork round the window
If you’re not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer.
What we seal
- Timber door frames
- Tenement windows
- Period & listed homes
- Sash and case windows
- Stone surrounds
- Brick reveals
Oakley homes and the weather
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.
If you look after a building such as Oakley CE Junior School, the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Overton station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. If you live in an older home near St John's, the joint between an old wall and a newer frame is usually the first place rain gets in.
Oakley is about 3 miles west of Basingstoke, in Hampshire. From the centre of Oakley to the outskirts, we cover sand mastic for every kind of property. We cover 683 towns and villages across Hampshire, from the larger towns to small villages. Our Reading page covers work nearby.
Work in RG23 is quoted and booked the same way as anywhere else. Whether your property is on Station Road, Marlborough Gardens and Anton Close or anywhere close by, we can help. We also cover Newfound (1 mile north-east), Kempshott (2 miles east), Worting (2 miles north-east), Buckskin (2 miles east) and Ibworth (2 miles north). We also work in nearby towns such as Basingstoke (3 miles east), Winchester (15 miles south-west), Fleet (15 miles east), Andover (14 miles west), Alton (11 miles south-east) and Tadley (7 miles north).
Local landmarks in Oakley
Locally, jobs take us to homes and businesses close to Barley Mow pub and Bishop Challoner Catholic Secondary School, among other places. The closest station to Oakley is Overton station, roughly 3.7 miles west. Other landmarks nearby include Park Prewett Hospital (3.2 miles north-east) and Willis Museum (3.9 miles east). Green spaces nearby include Farleigh Hill.
Aftercare tips
To keep the joints looking good and working properly:
- Avoid patching sand mastic with silicone
- Ask a joiner to look at soft timber first
- Don’t paint over the new mastic
- Plan mastic work ahead of painting
Do not run silicone over the new mastic. If anything cracks, get it looked at rather than patching it.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
What affects the quote in Oakley
Your quote is based on your job. We look at:
- The product the joint needs
- The number and length of the joints
- Whether old sealant or filler has to be cut out
- Any working-time requirements on site
Combining jobs into one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
What we need to know
When you contact us, these details help:
- Whether it’s a home or a business
- Any access issues, like height or stairs
- Roughly how big the job is
- What the problem is, such as mould, gaps, leaks or cracking
Want a quote for sand mastic? Please call 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Oakley: your questions answered
Is Oakley in your area for sand mastic?
Yes. We work across London and the South East, and Oakley is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing.
Can you help a landlord with a rental near Overton 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.
What do you need from me for a quote?
Let us know what needs doing and where. If we need more, we will ask.
Do the sealants smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
What does sand mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Can you seal over the old sealant?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Are you fully insured?
Yes, we are fully insured for every job we do.
Do you take out the old sealant first?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.