Hertfordshire · England
Northaw Glazing Silicone
Glazing joints in Northaw need attention? We remove the old material, prepare the joints and seal them properly.
- Black or yellowed silicone on glass joints
- Failed joints on frameless glass
- A quick top-up bead that didn’t last
Glazing silicone in Northaw
Glazing silicone is a maintenance item. Sun, rain and movement wear it down, and once it cracks, water follows. Renewing it keeps glazing joints doing their job. If you’re dealing with drips on the inside of a conservatory window and silicone pulling away from the glass, we can help.
Mastic can only go onto a dry, clean joint, so window work in Northaw is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Location
- Northaw (EN6)
- Region
- Hertfordshire
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
To keep the joints looking good and working properly:
- Use a gentle glass cleaner and a soft cloth
- Clear the conservatory gutters regularly
- Inspect the sealant on glazing annually
- Keep air moving in the conservatory
Keep the new joints dry for as long as we advise. After that, clean glass with a mild cleaner.
Drips or damp near a glazing joint shouldn’t be ignored. It may be sealant, or something else, and we will tell you which.
Different surfaces, different methods
Glass-to-glass joints
Frameless glass corners and panels are joined with silicone. We renew it with a clear or matching glazing silicone.
Shower screens
Black or peeling silicone on a screen lets water out. Cutting it out and resealing fixes it.
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
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.
Leave it or put it right?
Glazing joints need a sealant made for the job. General-purpose sealant from a DIY shop may not suit glass or the frame, so we use neutral-cure glazing silicone. Where a wall is exposed, as many are in small places like Northaw, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why Northaw clients choose us
- Sealant colour chosen to suit
- Trusted Arbo and Everbuild sealants
- We never seal over old sealant
- We leave the area clean and tidy
See what affects the cost and our reviews.
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes anything from an hour or two to most of a day, depending on the size of the job, and the area is left clean. Somewhere like Northaw needs a little journey planning: 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.
- First we agree the joints to be done.
- We cut away the failed silicone.
- The surfaces are cleaned with a suitable solvent.
- New glazing silicone goes in and is finished neatly.
- We inspect the work and test it where we can.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we are working on
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
To get a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We’ll send you a clear quote before any work starts.
Read more
Frames and glazing around Northaw
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Wyllyotts Manor (about 2.1 miles west) nearby, there’s older building stock in the area around Northaw as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Schools such as Northaw Church of England Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. If you let a flat or house near Cuffley station, a shower screen or conservatory joint that leaks is easier to reseal while the property is empty.
Northaw is about 2 miles north-east of Potters Bar, in Hertfordshire. Every kind of property in Northaw can book us for glazing silicone, old or new, large or small. The work is guaranteed for a year. Northaw is one of 381 towns and villages in Hertfordshire we cover for glazing silicone. You can also see our page for London, about 14 miles away.
Jobs for glazing silicone in EN6 works the same way as everywhere else we cover. That includes homes and businesses on Vineyards Road, Church Lane and Northaw Road West. We also cover the places around Northaw: Cuffley (1 mile east), Brookmans Park (2 miles north-west), Newgate Street (2 miles north-east), Bell Bar (2 miles north-west) and Little Berkhamsted (3 miles north). We also work in nearby towns such as Watford (11 miles west), Hemel Hempstead (14 miles west), Stevenage (14 miles north), St Albans (8 miles west), Welwyn Garden City (7 miles north) and Harpenden (12 miles north-west).
Near you in Northaw
Typical jobs here are in homes near Two Brewers Public House and Mount Grace School, among other places. For rail, the closest station is Cuffley station, roughly 1.6 miles east. Other landmarks nearby include Potters Bar Museum (2.1 miles west) and Chase Farm Hospital (3.3 miles south-east). Not far away are Fir and Pond Woods.
Signs you need glazing silicone in Northaw
Heat and cold make glass and frames move at different rates. Over years, that movement tears the silicone.
Any of these means the joints need attention:
- Mouldy sealant around glass panels
- New silicone smeared over old sealant
- Water getting into a conservatory at the joints
- Rooflight joints letting water in
In the older streets around Parish Church of St Thomas A Becket, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Before you book anyone
- What product goes in the joint
- What preparation is included
- Which colour the sealant will be
- What guarantee comes with the work
Common questions in Northaw
Can you do glazing silicone in Northaw?
Yes, Northaw is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
Will you come out to Northaw?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses.
Do you offer different sealant colours?
Normally, yes. White, clear and grey are common, and other colours are available, and we agree the colour with you before any work starts.
How long will you be here?
As a guide, most jobs take a few hours, depending on how many joints need doing. Bigger jobs take longer, and we’ll tell you how long to expect.
How much does glazing silicone cost in Northaw?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Is balustrade sealant something you do?
We can, if the base joint is sealed. Send us photos and we will take a look.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Quotes for glazing silicone in Northaw
You’ll get a clear quote before we start. It’s based on:
- Working hours on commercial sites
- Access and height
- The old material and how stubborn it is
- The type of sealant required
Combining jobs into one visit normally makes better use of the time than several visits. We’ll send you a clear quote for the lot.
What we need to know
When you call or email, these details help:
- What’s wrong with the joints now
- Any access issues, like height or stairs
- Whether it has been sealed before
- The address or postcode of the job
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved.