Hampshire · England
Sand Mastic in Headley Down
Professional sand mastic in and around Headley Down, with old sealant always removed completely and a 12-month guarantee.
- A silicone bead on a sash window that spoils the look
- Gaps where the frame meets the masonry
- Old sand mastic that has cracked, crumbled or fallen out
Sand mastic for homes and businesses in Headley Down
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted and we’ll advise if you’re redecorating. Typical jobs include window mastic to renew ahead of painting and patchy fillers round a sash window, on brick reveals, period & listed homes and sash and case windows.
Around Headley Down, conservatories, garden rooms and patio doors are often part of the house. Their glazing joints and frame seals are as much a part of the job as the windows, and any older timber or sash windows need a sealant that suits them.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Location
- Headley Down (GU35)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Why act early in Headley Down
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and finishes neatly against the masonry. In a smaller place like Headley Down, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
What you pay reflects the work, not guesswork. That is why we ask a few questions first.
What you get with us
- We leave the area clean and tidy
- We’re fully insured
- ARBOMaster approved applicator
- More than 20 years in sealant work
Take a look at our cost guide or what customers say.
What affects the quote in Headley Down
There’s no set price list, because no two jobs are the same. What we look at:
- Which sealant suits the joint
- Whether the work is at height
- Any mould that needs treating
- The size of the job
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Asking for a quote
You do not need to know the technical terms. Just tell us:
- Whether it has been sealed before
- A few photos by email, if you can
- What’s wrong with the joints now
- How many joints, rooms or windows are involved
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Surface by surface
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We work on single windows or whole elevations.
More services for Headley Down
How the visit works
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and tidy away. Most jobs take a few hours per window, depending on the condition of the joints. Parking around Headley Down is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- 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.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Mention any tricky access
- Mention any leaks or damp you’ve noticed
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
Every job is quoted individually, so the first step is telling us about yours. Simply phone 0345 464 0079 or drop us an email and describe the job and send photos if you have them.
Advice
Keeping the joints in good condition
So the new joints stay in good condition:
- Avoid heavy scraping on the mastic joint
- Keep sills and gutters clear so water drains away
- Check with your local planning authority if your home is listed
- Don’t run silicone over sand mastic
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
Windows and doors in Headley Down
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For landlords with property near Liphook station, any sash windows need sound mastic to keep draughts and rain out. Homes close to Church of All Saints include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in.
Headley Down is about 6 miles south of Farnham, in Hampshire. We provide sand mastic to homeowners, landlords and businesses in Headley Down and nearby, as part of our work across Hampshire. Headley Down is one of 683 towns and villages in Hampshire where we work. For nearby work, see our Reading page (24 miles or so).
Jobs for sand mastic in GU35 is quoted and booked the same way as anywhere else. We cover properties on Wilsons Road, Ludshott Grove and Fairview Road. Being close to the B3002, Headley Down is easy for our applicators to reach. We also cover the places around Headley Down: Arford (1 mile west), Headley (1 mile west), Wishanger Common (2 miles north), Standford (2 miles south-west) and Lindford (2 miles west). Within a short drive, we also cover Farnborough (12 miles north), Fleet (11 miles north), Aldershot (9 miles north), Alton (8 miles west), Petersfield (10 miles south-west) and Yateley (15 miles north).
Landmarks near Headley Down
Typical jobs here are in homes near Mill Chase Academy, among other places. The nearest railway station is Liphook station, roughly 3.4 miles south of the centre. Nearby you will also find Chase Community Hospital (2.8 miles west). For a walk, there’s Gibbet Hill and Deadwater Valley.
Questions from Headley Down
Is Headley Down within the area you cover?
Yes, Headley Down is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
I let a flat near Liphook station. Can you help?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. You can ring 0345 464 0079 or email us with the details for a clear quote.
What is sand mastic?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we are using and why.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses and we are fully insured.
Can I choose the sealant colour?
We’ll suggest a colour to suit the surroundings, from white and clear to greys and other shades. The choice depends on the product the joint needs.
Are you insured?
Yes. We are fully insured for domestic and commercial work.
How long will you be here?
A typical job takes anything from a few hours to a full day, depending on how many windows, including preparation and clearing up. Your quote will say how long we expect yours to take.
Common problems we fix in Headley Down
Some old mastic was never deep enough. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
Look out for these signs:
- Gaps where the frame meets the masonry
- Gaps round a timber door in stone or brick
- Old sand mastic that has cracked, crumbled or fallen out
- Window mastic to renew ahead of painting
Schools such as The Holme Church of England Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
What to look for in a quote
- What preparation is included
- How much experience the applicator has
- What product goes in the joint
- What happens if the job turns out different
When something else is needed
We won’t take on work that won’t last, so these are the limits:
- Sashes that rattle, stick or won’t open
- Planning or listed building consent (your local planning authority decides)
- Timber that has rotted
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Timber door frames
- Sash and case windows
- Brick reveals
- Tenement windows
- Period & listed homes
- Stone surrounds