Oxfordshire · England
Sand mastic for sash & case windows in Hardwick, Oxfordshire
Window and door surrounds in Hardwick need attention? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- A silicone bead on a sash window that spoils the look
- Old cement repairs round a window that have failed
- Mastic dropping out of the joint
Landlords, agents and businesses in Hardwick
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
About our sand mastic in Hardwick
If your home is listed or in a conservation area, check with your local planning authority whether consent is needed for work to windows. Sand mastic is often favoured as a like-for-like material. Common call-outs are for tired mastic found when preparing windows for paint and mastic dropping out of the joint, on period & listed homes, stone surrounds and sash and case windows.
Mastic can only go onto a dry, clean joint, so window work in Hardwick is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Place
- Hardwick (OX29)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Hardwick
More services for Hardwick
Should I try it myself first?
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
FAQs for Hardwick
Is Hardwick within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is sand mastic in Hardwick guaranteed?
All our work, in Hardwick and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we’ll talk you through it.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Can you do several jobs on one visit?
Yes. Several rooms, windows or areas can go on one quote.
Can I choose the sealant colour?
Most of the time, yes. We’ll explain which colours are available.
What is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
How the job changes by surface
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Leave the new mastic unpainted
- Sort the mastic before the decorators arrive
- Keep sills and gutters clear so water drains away
- Take care around the mastic when scraping paint
Avoid painting over the new mastic, as traditional guidance advises. If you’re redecorating, ask us first.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Sashes that rattle, stick or will not open
- Masonry that needs repairing
- Timber that has rotted
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
Surfaces we seal
- Sash and case windows
- Timber door frames
- Brick reveals
- Period & listed homes
- Tenement windows
- Stone surrounds
How it works
A visit follows a simple pattern: we look at the joints together, protect the area around them, carry out the job and clear up. It usually takes a few hours for a single window, longer for several. Somewhere like Hardwick needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we agree which joints need doing.
- 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.
- The surface is finished to suit the stone or brick.
Before we arrive
- Move anything stored near the joints
- Tell us if parking is tricky
- For business premises, tell us about site rules or sign-in
Ask for a quote
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job, and we’ll come back to you with a quote.
Related advice
What sand mastic looks like in Hardwick
With historic houses such as Longworth House (about 4.1 miles south) nearby, there’s older building stock in the area around Hardwick as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. In and around Hardwick, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Hardwick is about 3 miles south-east of Witney, in Oxfordshire. Whether you are in the middle of Hardwick or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Hardwick is one of 443 towns and villages in Oxfordshire where we work for sand mastic. Our Oxford page covers work nearby, about 9 miles away.
Our applicators cover all of OX29 for sand mastic. Hardwick is on the B4449, which makes it straightforward to reach with everything needed for sand mastic. Other places close to Hardwick include Brighthampton (2 miles south), Ducklington (2 miles north-west), Standlake (2 miles south-east), High Cogges (2 miles north) and South Leigh (2 miles north-east). Larger places within reach include Oxford (9 miles east), Didcot (13 miles south-east), Abingdon-on-Thames (9 miles south-east), Witney (3 miles north-west), Carterton (6 miles west) and Wantage (11 miles south).
Near you in Hardwick
Other landmarks nearby include Hinton Waldrist Castle (4.2 miles south) and Cogges Manor Farm Museum (2.6 miles north-west).
Why it’s worth doing now in Hardwick
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and finishes neatly against the masonry. Where a wall is exposed, as many are in small places like Hardwick, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Why choose Mr Mastic in Hardwick
- Old sealant always removed completely
- 20+ years of sealant experience
- We leave the area clean and tidy
- One-year guarantee on every job
Read what affects the cost or customer reviews.