Hampshire · England
Well Sand Mastic
Sand mastic for Well, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Mastic dropping out of the joint
- Tired mastic found when preparing windows for paint
- Gaps round a timber door in stone or brick
About our sand mastic in Well
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. We’re often asked to deal with draughty sash windows at the surround and a silicone bead on a sash window that spoils the look, on brick reveals, timber door frames and period & listed homes.
Mastic can only go onto a dry, clean joint, so window work in Well is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Whatever the size of the job, you get the same 12-month guarantee in Well and across Hampshire.
- Location
- Well (RG29)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
What else we do in Well
FAQs for Well
Do you work for landlords with property near Bentley (Hampshire) station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Is Well within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Is sand mastic better than silicone for my windows?
For period timber windows in stone or brick, sand mastic is often the better fit. On modern frames, we’d normally use a flexible sealant, and we will explain why.
Can sand mastic be painted?
It’s traditionally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Where do you work from?
We’re a Crawley-based firm. We work across South East England, London and Scotland.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit.
Frames and glazing around Well
Historic houses like Farnham Castle (about 4.8 miles east) are a reminder that the area around Well 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’s traditional sand mastic. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Bentley (Hampshire) station, any sash windows need sound mastic to keep draughts and rain out. If you live in an older home near Lord Wandsworth College Chapel, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For site and facilities teams at buildings such as Lord Wandsworth College, its window and door frames need their mastic kept sound, just like a home’s.
Well is about 5 miles west of Farnham, in Hampshire. Every kind of property in Well can book us for sand mastic. Every job comes with our one-year guarantee. Across Hampshire, we cover 683 places, and Well is one of them. For nearby work, see our Reading page (16 miles or so).
Here we cover the RG29 postcode area for sand mastic. Close by, we work in Long Sutton (1 mile west), South Warnborough (2 miles west), Odiham (3 miles north), Broad Oak (3 miles north) and North Warnborough (4 miles north-west). Larger places within reach include Basingstoke (9 miles north-west), Farnborough (8 miles north-east), Fleet (5 miles north-east), Aldershot (7 miles east), Alton (5 miles south-west) and Petersfield (14 miles south).
Landmarks near Well
For rail, the closest station is Bentley (Hampshire) station, about 2.9 miles south-east of the centre. Nearby you will also find Fleet Community Hospital (5.8 miles north-east) and Barley Pound (2.2 miles east). Not far away are Holybourne Hill and Dogmersfield Lake.
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Check the mastic when you check the paintwork
- Find out about consent before window work on a listed home
- Make sure water runs off the sill
- Sort the mastic before the decorators arrive
Leave the new mastic alone while it firms up. It forms a skin fairly soon but needs longer to fully harden.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
Different surfaces, different methods
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
Period and listed homes
A traditional finish suits a period property, and sand mastic is one of them.
What we can’t put right
In fairness, there are a few things sealant will not fix:
- Sashes that need overhauling
- Decayed frames that need repair
- Masonry that needs repairing
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Tenement windows
- Brick reveals
- Sash and case windows
- Timber door frames
- Stone surrounds
- Period & listed homes
How the visit works
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself normally takes a few hours for a single window, longer for several, depending on the amount of work. Somewhere like Well needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First we agree which joints need doing.
- 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.
Before we arrive
- Mention any parking rules near the property
- Move anything stored near the joints
- Keep children and pets away from the work area
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Related advice
Landlords, agents and businesses in Well
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Why act early in Well
New sash windows are a major, costly change, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Older cottages and farmhouses around Well can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Combining jobs into one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. We will give you a clear price for the lot.
Why book with us
- Experience in homes, commercial sites and hotels
- 180+ five-star Google reviews
- An ARBOMaster approved applicator
- We leave the area clean and tidy
Read how sealant jobs are priced and our reviews.