Hampshire · England
Sand Mastic in Andwell
Professional sand mastic in and around Andwell, with every bit of old sealant taken out first.
- Weathered mastic on the most exposed windows
- Gaps round a timber door in stone or brick
- Window mastic to renew ahead of painting
Landlords, agents and businesses in Andwell
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
Sand mastic for homes and businesses in Andwell
Silicone on a period window often looks wrong and is not always the right material. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. Common call-outs are for silicone on a period window that looks wrong and wind and rain getting in round a sash window, across brick reveals, stone surrounds and period & listed homes.
Outdoor sealant needs dry, clean surfaces, so work on frames around Andwell is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- Andwell (RG25, RG27, RG24)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How we quote for sand mastic
Your quote is based on your job. We look at:
- The amount of work
- The number of rooms or windows
- How much old sealant there is and how hard it is to remove
- Working hours on commercial sites
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first and agree the price before starting.
What to tell us for a quote
To make quoting easier, please include:
- Access, such as stairs, a lift or height
- Photos by email, if that is easy
- Any previous sealing or DIY work
- Where the job is, and your postcode
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.
How the visit works
On the day, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work begins. The work usually takes a few hours for a single window, longer for several. Somewhere as small as Andwell, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
Preparing for the visit
- Keep pets and children clear of the area while we work
- Mention any parking rules near the property
- Try not to wet indoor joints just before the visit
Getting a quote
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To get started, phone 0345 464 0079 or drop us an email.
Related advice
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Sort the mastic before the decorators arrive
- Take care around the mastic when scraping paint
- Make sure water runs off the sill
- Ask the planning authority about consent for listed or conservation-area homes
Leave the new mastic alone while it firms up. It forms a skin fairly soon, but takes longer to harden fully.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
When something else is needed
It helps to know what we can’t do:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Masonry that needs repairing
- Planning or listed building consent (your local planning authority decides)
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before you book.
Where we work in Andwell
- Period & listed homes
- Brick reveals
- Timber door frames
- Tenement windows
- Sash and case windows
- Stone surrounds
Andwell homes and the weather
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. With historic houses such as The Vyne (about 4.2 miles north-west) nearby, there’s older building stock in the area around Andwell as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Rented homes near Hook station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Andwell is about 3 miles south-west of Hook, in Hampshire. Across the RG25 area, we can carry out sand mastic at your property. Across Hampshire, we cover 683 places, Andwell among them. Reading is on our list too, around 13 miles away.
All of RG25, RG27 and RG24 is within our area for sand mastic, from the main roads to the quietest streets. Whether your property is on Greywell Road and Canal Reach or a nearby road, we can help. Other places close to Andwell include Mapledurwell (1 mile south), Water End (1 mile north-east), Old Basing (1 mile west), Lychpit (2 miles west) and Wildmoor (2 miles north). Larger places within reach include Basingstoke (4 miles west), Farnborough (11 miles east), Fleet (8 miles east), Aldershot (11 miles east), Alton (8 miles south) and Yateley (9 miles north-east).
Near you in Andwell
The closest station to Andwell is Hook station, roughly 2.4 miles east. Well-known places in the area include Festival Place (3.1 miles west) and Basingstoke and North Hampshire Hospital (4.2 miles west). Green spaces nearby include Dogmersfield Lake and The Mill Field.
Common problems we fix in Andwell
Some old mastic was never deep enough. A thin layer doesn’t hold well so we make sure the new mastic is the right thickness.
Keep an eye out for these signs:
- Silicone on a period window that looks wrong
- Mastic that needs renewing before redecorating
- Gaps between timber frames and stone or brick
- Patchy fillers round a sash window
If you live in an older home near St Swithun's church, the joint between an old wall and a newer frame is usually the first place rain gets in.
Comparing quotes
- Whether they seal over old material or remove it
- Whether the sealant suits the joint
- Whether you can choose the colour
- How the surfaces are prepared before sealing
Surface by surface
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we’ll confirm what’s needed.
Stone surrounds
Sand mastic sits naturally against stone. It finishes to look like part of the surround.
FAQs for Andwell
Do you work for landlords with property near Hook station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or email us with the details for a clear quote.
Will you come out to Andwell?
Yes. Andwell is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will explain our choice.
Do you guarantee sand mastic work?
There’s a 12-month guarantee on every job.
Do you offer different sealant colours?
Normally, yes. Sealants come in white, clear, grey and other colours for many products, and we will agree it with you first.
When will the new mastic be hard?
Not right away. The skin forms first, and the full set comes later, and we will tell you what to expect.
Are you insured?
Yes. We are fully insured, and we can confirm the details when we quote.
What is sand mastic?
Sand plus a binder based on linseed oil. It’s built up in the joint by hand and finished to sit neatly against the masonry.