Hertfordshire · England
Sand Mastic in Broxbourne
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Broxbourne, backed by a 12-month guarantee. Call for a quick quote.
- Patchy fillers round a sash window
- Draughts and rain around sash boxes
- Old sand mastic that has cracked, crumbled or fallen out
Broxbourne questions
Do you work for landlords with property near Broxbourne station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Is Broxbourne in your area for sand mastic?
Yes. We work across London and the South East, and Broxbourne is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing, and we will send you a clear quote.
How do I get a quote for sand mastic in Broxbourne?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Are you fully insured?
Yes, we’re fully insured for domestic and commercial work.
Do you take out the old sealant first?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
What exactly is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It combines sand with a linseed-oil-based binder.
Where do you work from?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Do I have to be there?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that generally means someone at home.
Sand mastic in Broxbourne, done properly
Traditional burnt sand mastic that sits naturally against stone and brick. It’s a good fit for period properties where a modern sealant bead would stand out. If you’re dealing with crumbling sand mastic round a window and gaps where the frame meets the masonry, we can help, on sash and case windows, tenement windows and brick reveals alike.
Homes around Broxbourne range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Broxbourne (EN10, EN11)
- Region
- Hertfordshire
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What sand mastic looks like in Broxbourne
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as Sheredes Primary School, its window and door frames need their mastic kept sound, just like a home’s. For landlords with property near Broxbourne station, any sash windows need sound mastic to keep draughts and rain out. If you live in an older home near Church of St Augustine, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Broxbourne is about 6 miles west of Harlow, in Hertfordshire. Whether you are in the middle of Broxbourne or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Hertfordshire, we cover 381 places, and Broxbourne is one of them. Our London page covers work nearby (18 miles or so).
We work across EN10 and EN11 for sand mastic and the streets around it. Streets in the area include New Road, Cock Lane and Bell Lane, all of which we cover. Broxbourne sits on or near the A10 and A1170, which makes travel easy. Neighbouring places we cover for sand mastic include Hoddesdon (1 mile north-east), High Leigh (1 mile north), Wormley (1 mile south), Goose Green (1 mile north-west) and Woollensbrook (1 mile north). Further out, we also cover Stevenage (13 miles north-west), St Albans (13 miles west), Bishop's Stortford (11 miles north-east), Welwyn Garden City (8 miles north-west), Harpenden (15 miles west) and Cheshunt (3 miles south-west).
Local landmarks in Broxbourne
We work in homes and buildings around The Golden Lion Inn, Barclay Park and Sheredes School. The closest station to Broxbourne is Broxbourne station, about 0.5 miles east. Other landmarks nearby include Barrowfield (3.7 miles north) and Lowewood Museum (0.5 miles north-east). Not far away are Cheshunt Lake and Danemead.
What we do, step by step
There isn’t much for you to do on the day. Show us the job and we will take it from there. The work itself takes a few hours per window, depending on the condition of the joints. For a job in Broxbourne, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as 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.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
Ask for a quote
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Related advice
What the job involves on each surface
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we’ll confirm what’s needed.
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
What affects the cost of sand mastic
The price is agreed before any work begins. It takes into account:
- The product the joint needs
- Mould in or behind the old joints
- Whether the work is at height
- When we can work, for business premises
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Helping us quote
There’s no need for technical detail. Just tell us:
- Where the property is
- How we’d reach the joints
- Roughly how big the job is
- The type of property
If you are in Broxbourne and need sand mastic, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
What sealant work can’t fix
Before you book, it’s worth knowing the limits:
- Sash cords, weights and draught-proofing of the sashes
- Rotten sashes, sills or window boxes (a joiner’s job)
- Crumbling stone or brickwork round the window
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Stone surrounds
- Brick reveals
- Tenement windows
- Timber door frames
- Period & listed homes
- Sash and case windows
Towns and villages near Broxbourne
Also in Broxbourne
Should I try it myself first?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Inspect the joints round the windows every year or so
- Do not run silicone over sand mastic
- Renew mastic before redecorating the windows
- Find out about consent before window work on a listed home
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
We also work for property managers and facilities teams. Several sites can be quoted together, and we’re fully insured.