Hertfordshire · England
Sand mastic for sash & case windows in Wormley, Hertfordshire
Our applicators work in Wormley on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Draughts and rain around sash boxes
- Gaps round a timber door in stone or brick
- Cement or filler used on old window joints that has cracked
Sand mastic in Wormley
We renew sand mastic around sash windows and doors in stone and brick. The old mastic is raked out, and new mastic is applied and shaped by hand. We’re often asked to deal with crumbling sand mastic round a window and gaps where the frame meets the masonry, across tenement windows, stone surrounds and brick reveals.
Houses in smaller places like Wormley can stand more in the open than those in a built-up town. The mastic around frames on those walls tends to age faster.
There’s a 12-month guarantee on every job, large or small.
- Where
- Wormley (EN10)
- Wider area
- Hertfordshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
What happens on the day
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before work begins. The work generally takes a few hours for a single window, longer for several. For a job in Wormley, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- For business premises, tell us about site rules or sign-in
- Mention any parking rules near the property
- Keep children and pets away from the work area
How to get a quote
Need a quote? Please phone 0345 464 0079 or drop us an email with a few details. We will explain what we’d do and send you a clear quote before we start.
Related advice
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Make sure water runs off the sill
- Check the mastic when you check the paintwork
- Do not paint over the new mastic
- Get any rot dealt with first
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber and timber that stays wet can rot.
Why deal with it now?
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in, and renewing the mastic closes them. In an older home around Wormley, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why book with us
- Over 20 years’ experience
- We never seal over old sealant
- 4.9 on Google from 180+ five-star reviews
- Quality sealants from Arbo and Everbuild
Also near Wormley
More services for Wormley
What affects the cost of sand mastic
We quote each job individually. These are the things that affect it:
- The type of sealant required
- How many rooms, windows or areas are involved
- Whether there’s mould to deal with
- How easy the joints are to reach
Combining jobs into one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
What we need to know
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
- The type of property
If you are in Wormley and need sand mastic, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Windows and doors in Wormley
With historic houses such as Forty Hall (about 4.7 miles south-west) nearby, there’s older building stock in the area around Wormley as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Rainfall in the South East is lower than in much of the UK, 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 Wormley Primary School, larger buildings have plenty of frames, and the mastic around each one ages. For an older house near a landmark such as Parish Church of St Lawrence, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For landlords with property near Broxbourne station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Wormley is about 1 mile south of Broxbourne, in Hertfordshire. We provide sand mastic to homes and businesses in Wormley and nearby, as part of our work across Hertfordshire. Across Hertfordshire, we cover 381 places, Wormley among them. Our London page covers work nearby, about 16 miles away.
We cover every part of EN10 for sand mastic and the streets around it. We cover properties on Slipe Lane, Wharf Road and Church Lane and the roads around them. Neighbouring places we cover for sand mastic include Turnford (1 mile south), Broxbourne (1 mile north), Hoddesdon (2 miles north), Wormley West End (2 miles west) and Cheshunt (2 miles south-west). Further out, we also cover Stevenage (14 miles north-west), St Albans (13 miles west), Bishop's Stortford (12 miles north-east), Welwyn Garden City (9 miles north-west), Harpenden (15 miles north-west) and Hatfield (9 miles west).
Near you in Wormley
Locally, jobs take us to homes and businesses close to The Queens Head Public House, The Broxbourne School and Cheshunt Park. The nearest railway station is Broxbourne station, roughly 1.2 miles north-east. Nearby you will also find Nazeing Glass Museum (1.1 miles north-east) and Hertford County Hospital (5.2 miles north-west). The countryside around Wormley includes Danemead and Cheshunt Lake.
Honest limits
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Sashes that need overhauling
- Putty and glazing repairs
- Damaged stone surrounds
If you are not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Where we work in Wormley
- Timber door frames
- Period & listed homes
- Brick reveals
- Tenement windows
- Stone surrounds
- Sash and case windows
Can I do it myself?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Common questions in Wormley
Do you cover smaller places like Wormley?
Yes, Wormley is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is Wormley in your area for sand mastic?
Yes, Wormley is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear quote.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Can new sealant go over the old?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Can tenants book the work?
Yes. Check with your landlord; we can send the quote to them too.
Is consent needed for window work on a listed home?
It’s best to ask your local planning authority first. Like-for-like sand mastic is often the preferred finish, but they decide.
Do you work for letting agents?
Yes, regularly. We can quote for several properties at once.