Hampshire · England
Sand Mastic in Picket Twenty
Sand mastic in Picket Twenty from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Silicone on a period window that looks wrong
- Tired mastic found when preparing windows for paint
- Weathered mastic on the most exposed windows
How we quote for sand mastic
Call for a quick quote. The main things that affect it are:
- The type of sealant required
- How many areas need sealing
- The old material and how stubborn it is
- Whether there’s mould to deal with
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Asking for a quote
You don’t need to know the technical terms. It helps if you can tell us:
- Photos by email, if that’s easy
- How many joints, rooms or windows are involved
- If it’s domestic, commercial or a hotel
- Whether it has been sealed before
Every job is quoted individually. Just ring 0345 464 0079 or send us an email with the details, and pictures are welcome.
How we handle sand mastic in Picket Twenty
A silicone bead around a sash window can look out of place and does not suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. We work on timber door frames, tenement windows and sash and case windows, and common reasons people get in touch are draughty sash windows at the surround and old sand mastic that has cracked, crumbled or fallen out.
Outdoor sealant needs dry, clean surfaces, so work on frames around Picket Twenty is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or drop us an email.
- Where
- Picket Twenty (SP10, SP11)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Picket Twenty
Also in Picket Twenty
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 amount of work. For a village or hamlet like Picket Twenty, the journey is planned in advance: 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.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Keep children and pets away from the work area
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
Get a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll talk you through the work.
Read more
Sand mastic in Picket Twenty: local notes
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 site and facilities teams at buildings such as Pilgrims' Cross CofE Aided Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Homes close to United Reformed Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Picket Twenty is about 1 mile east of Andover, in Hampshire. Homes, rented property, offices and hotels in Picket Twenty can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 683 places across Hampshire, from the larger towns to small villages. Southampton is on our list too, about 20 miles from Picket Twenty.
Jobs for sand mastic in SP10 and SP11 is quoted and booked the same way as anywhere else. Sand mastic is available to properties on Levy Road, London Road and Stalls Road. Picket Twenty sits on or near the A3093. We also cover the places around Picket Twenty: Andover Down (1 mile north-east), Finkley Down (1 mile north), Picket Piece (1 mile north-east), Andover (1 mile west) and East Anton (1 mile north-west). Within a short drive, we also cover Winchester (12 miles south-east), Romsey (15 miles south), Hyde (11 miles south-east), Tidworth (9 miles west), Weeke (11 miles south-east) and Kempshott (14 miles east).
Local landmarks in Picket Twenty
Locally, jobs take us to homes and businesses close to Winton Community Academy and Winton Community Academy and the streets around them. Picket Twenty’s nearest station is Andover station, about 1.8 miles west of the centre. Nearby you will also find Finkley Down Farm Museum (1 mile north) and Andover War Memorial Hospital (1.9 miles west). Green spaces nearby include Anton Lakes and Mill Lake.
What happens if it’s left?
If you are redecorating, renew the mastic first. Paint over cracked mastic will not stop the gaps, and the new mastic is traditionally left unpainted. In a small place like Picket Twenty, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
What you get with us
- Arbo and Everbuild products
- 4.9 on Google from 180+ five-star reviews
- An ARBOMaster approved applicator
- Homes, businesses and hotels
Read our cost guide or what customers say.
FAQs for Picket Twenty
Do you cover Picket Twenty for sand mastic?
Yes, Picket Twenty is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
Is Picket Twenty 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.
Can landlords and businesses book you?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels in Picket Twenty.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Is it OK to seal over old sealant?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all.
I rent my home. Can I book you?
Yes. Check with your landlord; we can send the quote to them too.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
When to call us in Picket Twenty
Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.
If you can see any of these, it’s time to have the joints looked at:
- Open joints round the window box
- Failed mastic on an exposed elevation
- Wind and rain getting in round a sash window
- Old cement repairs round a window that have failed
Letting a property close to Andover station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
What to look for in a quote
- What preparation is included
- How much experience the applicator has
- How long the guarantee is
- Which colour the sealant will be
How the job changes by surface
Tenement and terrace windows
Where a building is shared, window work may involve neighbours, so check who is responsible first.
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
DIY sealant or a professional job?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Have rotten timber repaired before new mastic goes in
- Renew mastic before redecorating the windows
- Ask us before painting near the mastic
- Ask the planning authority about consent for listed or conservation-area homes
Avoid painting over the new mastic, as traditional guidance advises. Ask us before any decorating around it.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.