Hertfordshire · England
Sacombe Sand Mastic
Our applicators work in Sacombe on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Draughts and rain around sash boxes
- Gaps where the frame meets the masonry
- Tired mastic found when preparing windows for paint
Sacombe questions
Do you cover smaller places like Sacombe?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for landlords with property near Watton-At-Stone station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Can old silicone round a sash window be swapped for sand mastic?
Yes, we do this often. The old silicone has to come out completely so the mastic beds in well.
Can I choose the sealant colour?
We will 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.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
Is the work guaranteed?
Our 12-month guarantee applies to all our work.
Are you fully insured?
Yes. We are fully insured.
Sand mastic for homes and businesses in Sacombe
Silicone on a period window often looks wrong and is not always the right material. Sand mastic is the traditional choice and we can swap the silicone for it. We work on brick reveals, tenement windows and sash and case windows, and people most often call us about silicone on a period window that looks wrong and mastic dropping out of the joint.
In a village or hamlet like Sacombe, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
There’s a 12-month guarantee on every job, large or small.
- Location
- Sacombe (SG12)
- Region
- Hertfordshire
- Cover
- One year on every job
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in Sacombe
If you’re redecorating, renew the mastic first. Paint over cracked mastic will not stop the gaps, and the new mastic is traditionally left unpainted. Around Sacombe, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
What you get with us
- Experience in homes, commercial sites and hotels
- Rated 4.9 stars on Google
- An ARBOMaster approved applicator
- More than 20 years in sealant work
Take a look at what affects the cost and what customers say.
What happens on the day
When we arrive, we look over the joints with you first, so you know exactly what we’re doing. Surfaces next to the work are protected before any work begins. Most jobs take anything from a few hours to a full day, depending on how many windows. Somewhere as small as Sacombe, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- 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
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Related advice
Looking after it afterwards
To keep the joints looking good and working properly:
- Get any rot dealt with first
- Inspect the joints round the windows every year or so
- Sort the mastic before the decorators arrive
- Leave the new mastic unpainted
Don’t run silicone over the new mastic. If you see a crack, ask us to take a look rather than patching it.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
What we’re called out for in Sacombe
Sand mastic slowly weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Signs it’s time to call us include:
- Old cement repairs round a window that have failed
- Gaps where the frame meets the masonry
- Mastic round period door frames that has failed
- Mastic that needs renewing before redecorating
If you live in an older home near Church of St Katherine, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What to look for in a quote
- When the joint can take water or movement
- Who turns up on the day
- Are they insured?
- Whether VAT is included
Frames and glazing around Sacombe
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Aston Bury (about 3.7 miles west) are a reminder that the area around Sacombe has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Letting a property close to Watton-At-Stone station? Then any sash windows need sound mastic to keep draughts and rain out.
Sacombe is about 3 miles north-west of Ware, in Hertfordshire. Anywhere in SG12, we cover sand mastic for homes and businesses. Our Hertfordshire coverage runs to 381 places, and Sacombe is one of them. There’s also a page for London, about 25 miles away.
Here we cover the SG12 postcode area for sand mastic. Close by, we work in Sacombe Green (1 mile east), Dane End (1 mile north), Whempstead (1 mile north-west), Tonwell (1 mile south) and Standon Green End (2 miles east). Within a short drive, we also cover Stevenage (6 miles north-west), St Albans (13 miles south-west), Bishop's Stortford (10 miles east), Welwyn Garden City (7 miles south-west), Harpenden (12 miles west) and Hitchin (11 miles north-west).
What’s near Sacombe
The nearest railway station is Watton-At-Stone station, about 2.3 miles west. Well-known places in the area include Hertford Railway Museum (3.6 miles south) and Benington Castle (3.4 miles north-west). Not far away are Astonbury Wood.
Honest limits
New sealant can’t fix everything, and we will tell you before work begins. It will not solve:
- Damaged stone surrounds
- Decayed frames that need repair
- Putty and glazing repairs
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
Where we work in Sacombe
- Tenement windows
- Timber door frames
- Stone surrounds
- Period & listed homes
- Brick reveals
- Sash and case windows
Towns and villages near Sacombe
What else we do in Sacombe
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too in Sacombe and across Hertfordshire. We can quote a run of properties together, and we’re fully insured for the work.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Surface by surface
Brick reveals
We rake out the old mastic and pack deep voids before pointing.
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.