Hertfordshire · England
Sand mastic for sash & case windows in Shillington, Hertfordshire
Sand mastic in Shillington from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Patchy fillers round a sash window
- Gaps between timber frames and stone or brick
- Wind and rain getting in round a sash window
Landlord and commercial work in Shillington
If you manage several properties in or around Shillington, several properties can be quoted together. Just tell us the addresses and what each one needs.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Sand mastic for homes and businesses in Shillington
Burnt sand mastic is a traditional material blends with stone and brick surrounds. It suits period and listed homes, where modern sealant can look out of place. If you’re dealing with a silicone bead on a sash window that spoils the look and crumbling sand mastic round a window, we can put it right, whatever the surface.
Around Shillington, 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.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Shillington (SG5)
- Wider area
- Hertfordshire
- Cover
- A year, on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Also near Shillington
What else we do in Shillington
Honest limits
We’d rather tell you now than do work that won’t last, so these are the limits:
- Timber that has rotted
- Masonry that needs repairing
- Planning or listed building consent (your local planning authority decides)
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Surfaces we seal
- Timber door frames
- Brick reveals
- Sash and case windows
- Period & listed homes
- Stone surrounds
- Tenement windows
When to call us in Shillington
Rain on the window surround works into any crack and loosens it further. Windows facing the weather tend to go first.
Keep an eye out for any of the following:
- Old cement repairs round a window that have failed
- A silicone bead on a sash window that spoils the look
- Gaps between timber frames and stone or brick
- Window mastic to renew ahead of painting
If you look after a building such as Shillington Lower School, larger buildings have plenty of frames, and the mastic around each one ages.
What to look for in a quote
- Whether the sealant suits the joint
- What happens if they find a problem under the old sealant
- How the joint is cleaned and prepared
- Whether they seal over old material or remove it
Common questions in Shillington
I let a flat near Arlesey station. Can you help?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Is Shillington in your area for sand mastic?
Yes. We work across London and the South East, and Shillington is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear quote.
How long does sand mastic take?
A typical job takes anything from a few hours to a full day, depending on how many windows, including preparation and clearing up. We will confirm how long when we quote.
Can you do several jobs on one visit?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
What exactly is sand mastic?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Can you match the sealant colour?
In most cases you can choose. We’ll tell you which colours the right product comes in and agree one before work begins.
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Look over the window mastic once a year
- Avoid patching sand mastic with silicone
- Make sure water runs off the sill
- Get any rot dealt with first
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
What happens on the day
Good joint work is mostly preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it normally takes a few hours for a single window, longer for several. Somewhere like Shillington needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- 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.
Before we arrive
- Tell us about any water getting in
- Clear items away from the joints we are working on
- On commercial sites, let us know about site rules
Getting a quote
If you’re in Shillington and need sand mastic, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Read more
Why it’s worth doing now in Shillington
Replacing sash windows is a big decision for a period home and on a listed home, consent may be needed. Where the frames are in good order, new mastic seals the surround. In a small place like Shillington, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will send you a clear quote for the lot.
What you get with us
- Neat joints and a tidy finish
- Rated 4.9 stars on Google
- Full insurance on every job
- Old sealant always removed completely
Take a look at how sealant jobs are priced or our reviews.
Frames and glazing around Shillington
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around Church of All Saints, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Letting a property close to Arlesey station? Then any sash windows need sound mastic to keep draughts and rain out.
Shillington is about 5 miles north-west of Hitchin, in Hertfordshire. Our applicators cover sand mastic for householders, landlords and businesses in Shillington. Shillington is one of 381 towns and villages in Hertfordshire where we work for sand mastic. Our London page covers work nearby, about 36 miles away.
We cover every part of the SG5 postcode area for sand mastic. Streets in the area include Hillfoot Road, New Walk and Church View Avenue, all of which we cover. Close by, we work in Hanscombe End (1 mile west), Apsley End (1 mile south-west), Pirton (2 miles south-east), Hexton (3 miles south-west) and Pegsdon (3 miles south). We also work in nearby towns such as Stevenage (10 miles south-east), Welwyn Garden City (15 miles south-east), Harpenden (12 miles south), Hitchin (5 miles south-east), Letchworth (6 miles east) and Letchworth Garden City (6 miles east).
Landmarks near Shillington
Around Shillington, our work takes us to homes and buildings near The Five Bells Public House, among other places. The nearest railway station is Arlesey station, roughly 4.6 miles north-east. Well-known places in the area include Fairfield Hospital (4.9 miles east) and Stondon Motor Museum (2.1 miles east). Not far away are Cain Hill and Pegsdon Hills.