Hertfordshire · England
Sand Mastic in Green Tye
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Green Tye, with a 12-month guarantee on every job. Call for a quick quote.
- Window mastic to renew ahead of painting
- Modern sealant on a period surround
- Gaps between timber frames and stone or brick
Sand mastic in Green Tye
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Sand mastic is often favoured as a like-for-like material. We’re often asked to deal with wind and rain getting in round a sash window and a silicone bead on a sash window that spoils the look, across period & listed homes, stone surrounds and timber door frames.
Around Green Tye, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Each job carries a 12-month guarantee.
- Where
- Green Tye (SG10)
- Wider area
- Hertfordshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Green Tye
Is Green Tye in your area for sand mastic?
Yes. Our work covers London and the South East, and Green Tye is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll send you a clear quote.
Is Green Tye within the area you cover?
Yes, Green Tye is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
How much does sand mastic cost in Green Tye?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or send us an email and let us know what needs doing and where.
What guarantee comes with the work?
There’s a 12-month guarantee on every job.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Where do you work from?
We’re a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Which products do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we will talk you through it.
More services for Green Tye
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Plan mastic work ahead of painting
- Leave the new mastic unpainted
- Go gently near the mastic when preparing windows
- Do not run silicone over sand mastic
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look rather than patching it.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can be quoted together.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
What affects the quote in Green Tye
The price is agreed before any work begins. It takes into account:
- The size of the job
- The old material and how stubborn it is
- When we can work, for business premises
- The type of sealant required
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Access, such as stairs, a lift or height
- Roughly how big the job is
- Whether it has been sealed before
- Where the job is, and your postcode
Asking for a quote is easy: let us know the job and the location. A few photos by email make the job easier to understand.
The process
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a single window, longer for several, and the area is left clean. For a village or hamlet like Green Tye, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- 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.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Mention if the joints have been sealed before
- On commercial sites, let us know about site rules
- Clear items away from the joints we’re working on
How to get a quote
For a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.
Advice
Why act early in Green Tye
Draughts round a sash window are not always the sashes. Open mastic joints round the box can let air in and new mastic seals them. In a small place like Green Tye, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and give you a clear quote before we start.
What you get with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Arbo and Everbuild products
- Every job guaranteed for a year
- Experience in homes, commercial sites and hotels
Take a look at what affects the cost and what customers say.
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
What sealant work cannot fix
We’d rather tell you now than do work that won’t last, so these are the limits:
- Planning or listed building consent (your local planning authority decides)
- Masonry that needs repairing
- Rotten sashes, sills or window boxes (a joiner’s job)
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer before booking.
What we seal
- Timber door frames
- Period & listed homes
- Brick reveals
- Stone surrounds
- Tenement windows
- Sash and case windows
Windows and doors in Green Tye
Historic houses like Much Hadham Palace (about 1.3 miles north-west) are a reminder that the area around Green Tye has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Church of St Thomas, the joint between an old wall and a newer frame is usually the first place rain gets in. Letting a property close to Bishops Stortford station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Green Tye is about 3 miles south-west of Bishop's Stortford, in Hertfordshire. Homes, rented property, offices and hotels in Green Tye can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 381 places across Hertfordshire, from the larger towns to small villages. We also work in Chelmsford, about 18 miles from Green Tye.
Our applicators cover all of SG10 for sand mastic and the streets around it. If you are just outside Green Tye, we cover Hadham Cross (1 mile west), Much Hadham (1 mile north-west), Nether Street (2 miles south-west), Hadham Ford (2 miles north) and Widford (2 miles south-west). We also work in nearby towns such as Stevenage (13 miles west), Bishop's Stortford (3 miles north-east), Welwyn Garden City (13 miles west), Hoddesdon (8 miles south-west), Cheshunt (11 miles south-west) and Hatfield (15 miles west).
Local landmarks in Green Tye
For rail, the closest station is Bishops Stortford station, roughly 3.2 miles north-east of the centre. Well-known places in the area include Herts and Essex Hospital (3.6 miles north-east) and Henry Moore Studios and Gardens (0.8 miles south-west). For a walk, there’s Thorley Wash nature reserve.