Hampshire · England
Shalden Green Sand Mastic
Sand mastic for Shalden Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cement or filler used on old window joints that has cracked
- Window mastic to renew ahead of painting
- Failed mastic on an exposed elevation
About our sand mastic in Shalden Green
A silicone bead around a sash window can look out of place and is not always the right material. Sand mastic is the traditional choice and we can swap the silicone for it. Common call-outs are for cracked mastic round a front door frame and failed mastic on an exposed elevation, across stone surrounds, period & listed homes and sash and case windows.
Homes in small places like Shalden Green often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Shalden Green (GU34)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlord and commercial work in Shalden Green
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Frames and glazing around Shalden Green
With historic houses such as Hall Place (about 3.1 miles south-west) nearby, there’s older building stock in the area around Shalden Green as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Historic houses such as Hall Place, about 3.1 miles south-west, show how far back building around Shalden Green goes, and older homes nearby need a sealant that suits their walls. If you let a flat or house near Alton station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Shalden Green is about 3 miles north-west of Alton, in Hampshire. Homes, rented property, offices and hotels in Shalden Green can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our Hampshire coverage runs to 683 places, and Shalden Green is one of them. We also work in Reading, around 18 miles away.
Our applicators cover all of the GU34 postcode area for sand mastic and the streets around it. Nearby, we also carry out sand mastic in Shalden (1 mile south), Southrope (2 miles north-west), Bagmore (2 miles west), Burkham (3 miles west) and Bentworth (3 miles south-west). Further out, we also cover Basingstoke (7 miles north-west), Farnborough (13 miles north-east), Fleet (9 miles north-east), Aldershot (11 miles east), Alton (3 miles south-east) and Petersfield (13 miles south).
Near you in Shalden Green
We work in homes and buildings around The Golden Pot pub. Shalden Green’s nearest station is Alton station, about 2.9 miles south-east. Other landmarks nearby include Gliding Heritage Centre (0.9 miles west) and Alton Community Hospital (3.3 miles south). The countryside around Shalden Green includes Holybourne Hill.
What happens if it’s left?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic doesn’t seal it, and the new mastic is traditionally left unpainted. Around Shalden Green, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why book with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Experience in homes, commercial sites and hotels
- We never seal over old sealant
- Approved under the ARBOMaster scheme
Honest limits
New sealant cannot fix everything, and we’d rather say so up front. Sealant will not put right:
- Crumbling stone or brickwork round the window
- Whether work needs listed building consent
- Decayed frames that need repair
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
Where we work in Shalden Green
- Period & listed homes
- Stone surrounds
- Brick reveals
- Tenement windows
- Sash and case windows
- Timber door frames
The process
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes a few hours for a single window, longer for several, depending on the size of the job. Somewhere like Shalden Green 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.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- Move anything stored near the joints
How to get a quote
Every job is quoted individually. Simply ring 0345 464 0079 or send us an email and describe the job and send photos if you have them.
Read more
Other services in Shalden Green
Different surfaces, different methods
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It gives a traditional finish.
Stone surrounds
The stone is treated with care when the old mastic comes out.
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Check the mastic when you check the paintwork
- Have rotten timber repaired before new mastic goes in
- Ask the planning authority about consent for listed or conservation-area homes
- Sort the mastic before the decorators arrive
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look before trying a quick fix.
Sound mastic protects the frame. Failed mastic lets water reach the timber and timber that stays wet can rot.
Shalden Green questions
Do you work for landlords with property near Alton station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Will you come out to Shalden Green?
Yes. Shalden Green is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you will get one quote.
Which is right for my windows, sand mastic or modern sealant?
We’ll help you decide. Period homes often look best with sand mastic, and modern sealants suit newer frames.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Are you an approved applicator?
Yes. We are an ARBOMaster approved applicator.
Can old silicone round a sash window be swapped for sand mastic?
Yes. The silicone is cut out and the joint cleaned before the sand mastic goes in.
How long does sand mastic take to harden?
Not right away. The skin forms first, and the full set comes later and we’ll give you an idea for your job.
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.