Hertfordshire · England
External & façade joints in Norton, Hertfordshire
External mastic in Norton from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Hard, crazed mastic that has stopped moving
- Sealant that has lost its bond to the brick or render
- Gaps where render, brick and frames meet
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Adding movement joints to masonry that has none
- Cracked brickwork or render that needs a builder or plasterer
- Damp that is not coming from the joint
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
- Render & cladding joints
- Concrete & block
External mastic for homes and businesses in Norton
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement. We’re often asked to deal with rain getting behind render or cladding at a joint and failed seals between different materials, on brickwork movement joints, render & cladding joints and copings & trims.
Outside joints can only be sealed when they’re dry, so work in Norton is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
Every job is covered by a one-year guarantee, wherever you are in Hertfordshire.
- Location
- Norton (SG6)
- Region
- Hertfordshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How the visit works
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes anything from a few hours to several days, depending on the building. Somewhere like Norton 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.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Preparing for the visit
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
- Let us know about stairs, lifts or work at height
Ask for a quote
Want a quote for external mastic? Please phone 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
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For landlords and businesses
Landlords and letting agents in Norton can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Also in Norton
How to look after the new joints
So the new joints stay in good condition:
- Look over the joints every year, ideally after winter
- Leave the joints unpainted unless we have said otherwise
- Keep soil, plants and ivy away from the joints
- Fix overflowing gutters above sealed joints
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
DIY versus a professional finish
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Norton buildings and the weather
Historic houses like Hinxworth Place (about 3.4 miles north) are a reminder that the area around Norton has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. Letchworth Garden City, which Norton is part of, was laid out as a garden city in the early twentieth century. Homes range from the early garden city houses to later estates, each with gutters, trims and wall joints of their own age.
For landlords with property near Baldock station, split movement joints are easy to miss on a rental until damp shows inside. In the older streets around Church of St Nicholas, an extension built onto an older house moves differently, and the joint between them takes the strain.
Norton is about 1 mile west of Baldock, in Hertfordshire. Every kind of property in Norton is covered for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Our Hertfordshire coverage runs to 381 places, Norton among them. You can also see our page for London, about 35 miles away.
Here we cover the SG6 postcode area for external mastic. We cover properties on Croft Lane, Green Lane and Cashio Lane and the roads around them. We also cover the places around Norton: Letchworth (1 mile south-west), Letchworth Garden City (1 mile south-west), Willian (2 miles south), Walsworth (3 miles south-west) and Ickleford (3 miles south-west). Within a short drive, we also cover Stevenage (6 miles south), Welwyn Garden City (14 miles south), Harpenden (14 miles south-west), Hitchin (4 miles south-west), Hertford (15 miles south-east) and Ware (15 miles south-east).
Around Norton
Around Norton, our work takes us to homes and buildings near The Three Horseshoes Inn, The Knights Templar School and Norton School and the streets around them. The nearest railway station is Baldock station, roughly 1 mile east of the centre. Other landmarks nearby include Bygrave House (2.6 miles north-east) and First Garden City Heritage Museum (1.3 miles south-west). The countryside around Norton includes Arlesey Old Moat and Glebe Meadows.
When to call us in Norton
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
People usually contact us when they notice one of these:
- Panel joints letting water in
- Old sealant gone brittle and cracked
- Movement joints filled with mortar instead of sealant
- Rain getting behind render or cladding at a joint
Managing a site like Norton St Nicholas CofE (VA) Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- How long the guarantee is
- Whether they seal over old material or remove it
- Is VAT in the price?
- What product goes in the joint
Why deal with it now?
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. Around Norton, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit usually makes better use of the time than several visits. We’ll give you a clear quote for the lot.
Why choose Mr Mastic in Norton
- Old sealant always removed completely
- Approved under the ARBOMaster scheme
- Arbo and Everbuild products
- 4.9 on Google from 180+ five-star reviews
Your questions about external mastic in Norton
Is Norton within the area you cover?
Yes, Norton is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Baldock station?
Yes. We work for landlords and agents as well as householders. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
How long will you be here?
That depends on the amount of work, but most jobs take anything from a few hours to several days, depending on the building. We’ll give you a better idea when we quote.
How do you reach high-level joints?
That depends on the building and the joints. Where joints can be reached safely, we will do them. Tell us about the building and we will confirm what access is needed.
What colours does the sealant come in?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.