Hampshire · England
Sand mastic for sash & case windows in Crofton, Hampshire
Sand mastic for Crofton, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Mastic worn away on windows facing the weather
- Mastic that needs renewing before redecorating
- Crumbling sand mastic round a window
Sand mastic in Crofton, done properly
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. Typical jobs include crumbling sand mastic round a window and cracked mastic round a front door frame, across tenement windows, stone surrounds and sash and case windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Crofton is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Every job is covered by our 12-month guarantee, wherever you are in Hampshire.
- Location
- Crofton (PO14, PO13)
- Region
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How the job changes by surface
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
Sand mastic in Crofton: local notes
Crofton is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces 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.
In the older streets around Peel Common Mission Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Rented homes near Fareham station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Crofton is about 1 mile east of Stubbington, in Hampshire. Our applicators cover sand mastic for homeowners, landlords and businesses in Crofton and the surrounding area. Crofton is one of 683 places in Hampshire we cover.
Jobs for sand mastic in PO14 and PO13 works the same way as everywhere else we cover. Sand mastic is available to properties on Mark's Road, Gosport Road and Newgate Lane and the roads around them. If you’re just outside Crofton, we cover Peel Common (1 mile east), Rowner (1 mile east), Bridgemary (1 mile east), Lee-on-the-Solent (1 mile south) and Fareham (2 miles north). Further out, we also cover Havant (10 miles east), Eastleigh (12 miles north-west), Horndean (10 miles north-east), Totton (15 miles north-west), Chandler's Ford (14 miles north-west) and Hedge End (8 miles north-west).
Around Crofton
Typical jobs here are in homes near Baycroft School and Peel Common Infant School and Nursery Unit. The closest station to Crofton is Fareham station, about 2.1 miles north of the centre. Well-known places in the area include Gosport War Memorial Hospital (3 miles south-east) and Carron Row Farm Museum (3 miles north-west). The countryside around Crofton includes Portsdown Hill and West of the River Alver.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
What affects the cost of sand mastic
Jobs vary more than people expect. What affects the quote:
- The old material and how stubborn it is
- The size of the job
- How many rooms, windows or areas are involved
- Access and height
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first and give you a clear price before work begins.
Helping us quote
What to tell us when you ask for a quote:
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
- Photos by email, if that is easy
- What’s wrong with the joints now
If you’re in Crofton and need sand mastic, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
Places near Crofton
Also in Crofton
What sealant work cannot fix
We won’t take on work that will not last, so these are the limits:
- Cracked or broken glass
- Whether work needs listed building consent
- Damaged stone surrounds
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Joints and surfaces we work on
- Timber door frames
- Stone surrounds
- Tenement windows
- Brick reveals
- Sash and case windows
- Period & listed homes
The process
We keep the work tidy and contained to the area we are working on, so you can carry on as normal. The job usually takes a few hours per window, depending on the condition of the joints, and we tell you how long to leave it before we go. Somewhere like Crofton needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Mention if the joints have been sealed before
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
Getting a quote
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will come back to you with a quote.
Read more
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Avoid patching sand mastic with silicone
- Do not paint over the new mastic
- Ask the planning authority about consent for listed or conservation-area homes
- Have rotten timber repaired before new mastic goes in
Avoid painting over the new mastic, as traditional guidance advises. If you are redecorating, ask us first.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber, which can lead to rot.
Crofton questions
Does living near the coast affect sand mastic in Crofton?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are normally the first to need attention.
Will you come out to Crofton?
Yes, Crofton is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
What guarantee comes with the work?
Every job comes with our one-year guarantee, and we are fully insured.
Can landlords and businesses book you?
Yes, often. Several properties can go on one quote.
Can I choose the sealant colour?
Yes. White, clear and grey are common, and other colours are available for many products, and we agree the colour with you before any work starts.
Can you replace silicone on a period window with sand mastic?
Generally, yes. With the silicone removed and the joint cleaned, sand mastic is applied by hand.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Signs you need sand mastic in Crofton
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
People generally contact us when they notice one of these:
- Draughts and rain around sash boxes
- Open joints round the window box
- Crumbling sand mastic round a window
- Cement or filler used on old window joints that has cracked
Managing a site like Crofton School? Then its window and door frames need their mastic kept sound, just like a home’s.
Before you book anyone
- Who turns up on the day
- What insurance they hold
- What happens if the job turns out different
- How long the guarantee is