Hertfordshire · England
Great Hormead External Mastic
Movement joints in Great Hormead need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Cracked joints where brick meets render or frames
- Joints with sealant missing in places
- Joints pointed up with cement by mistake
Honest limits
New sealant can’t fix everything, and we’ll tell you before we start. It will not solve:
- Movement that is more than a sealant joint can take
- Damp that isn’t coming from the joint
- Adding movement joints to masonry that has none
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
- Façade panels
- Copings & trims
- Joints between brick and frames
How we handle external mastic in Great Hormead
Low-level joints can normally be done from the ground. For joints higher up, give us some details of the building and we’ll confirm what’s needed to reach them safely. If you have sealant pulling away from one side of the joint and rigid filler in a joint that should flex, we can help, whatever the surface.
Older homes in small places like Great Hormead may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Great Hormead (SG9)
- Region
- Hertfordshire
- Guarantee
- A year, on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Great Hormead
More services for Great Hormead
Leave it or put it right?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. In a small place like Great Hormead, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or send us an email for an honest opinion and a quote.
What you get with us
- Arbo and Everbuild products
- A 12-month guarantee on all work
- Any old sealant cut out fully, not covered over
- Over 20 years’ experience
See what affects the cost and our reviews.
What we are called out for in Great Hormead
Using the wrong sealant is another common reason. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
The most common problems we see are:
- Cracked joints where brick meets render or frames
- Failed sealant between panels on a façade
- Moss and dirt in joints with no sealant left
- Weathered mastic that no longer stretches
For an older house near a landmark such as Church of St Nicholas, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before you book
- When the joint can take water or movement
- Which colour the sealant will be
- Whether all the old sealant comes out first
- What preparation is included
External mastic in Great Hormead: local notes
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.
Schools such as Hormead Church of England (VA) First School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Great Hormead is in Hertfordshire. Our applicators cover external mastic for homeowners, landlords and businesses in Great Hormead, as part of our work across Hertfordshire. Our area takes in 381 places across Hertfordshire, large and small. For nearby work, see our Chelmsford page.
Work in SG9 works the same way as everywhere else we cover. You’ll find streets such as Anderson's Lane, Halfacre Lane and Horseshoe Lane, and we cover them all. We also cover the places around Great Hormead: Daw's End (1 mile north), Anstey (2 miles north), Wyddial (2 miles north-west), Layston (2 miles west) and Brent Pelham (2 miles east). Within a short drive, we also cover Stevenage (10 miles west), Bishop's Stortford (8 miles south-east), Welwyn Garden City (14 miles south-west), Hitchin (13 miles west), Hoddesdon (14 miles south) and Hertford (12 miles south-west).
Landmarks near Great Hormead
Typical jobs here are in homes near The Beehive pub. Well-known places in the area include Brent Pelham (1.7 miles north-east).
Quotes for external mastic in Great Hormead
The quote reflects the job in front of us. We take into account:
- The number of rooms or windows
- The type of sealant required
- How easy the joints are to reach
- Any mould that needs treating
The cost depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before we start, so you know where you stand.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- Whether it has been sealed before
- Pictures of the joints, sent by email
- The address or postcode of the job
- If it’s domestic, commercial or a hotel
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, ring 0345 464 0079 or send us an email.
Great Hormead questions
Can you do external mastic in Great Hormead?
Yes, Great Hormead is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing, and we’ll send you a clear quote.
Is external mastic in Great Hormead guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
How long before the joint can be used?
Different products cure at different speeds, so please follow the time we give you when we finish.
Will the old sealant be removed?
Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
What is a movement joint?
Most straight vertical gaps in brickwork are movement joints. It lets the bricks expand without cracking, and it should be sealed with a flexible sealant.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Is it OK to fill a movement joint with cement?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Are you fully insured?
Yes. We are fully insured for domestic and commercial work.
How it works
Before we leave, we go over the finished joints with you. The visit itself normally takes anything from a few hours to several days, depending on the building, depending on the size of the job. Somewhere as small as Great Hormead, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Clear the area around the work
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
Ask for a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Advice
Aftercare tips
After the cure time, these simple habits help:
- Point out the joints to other trades
- Keep soil, plants and ivy away from the joints
- Keep high-pressure jets off the joints
- Leave the joints unpainted unless we’ve said otherwise
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick, all bigger jobs than a reseal.
Can I do it myself?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.