Hertfordshire · England
External & façade joints in Woodside, Hertfordshire
Movement joints in Woodside need attention? We cut out the old, prepare the joints and apply the right sealant.
- Sealant pulling away from one side of the joint
- Water getting into walls through failed joints
- Moss and dirt in joints with no sealant left
External mastic in Woodside
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We take the old material out and do it properly. We’re often asked to deal with sealant pulling away from one side of the joint and brick movement joints where the sealant has split, across brickwork movement joints, copings & trims and façade panels.
In a smaller place like Woodside, some homes face open ground, and walls and rooflines facing the weather take the worst of it. That is where gutter joints and wall joints tend to fail first.
The work is covered for a year after we finish. If anything is not right with it, ring 0345 464 0079 or send us an email.
- Location
- Woodside (WD25, WD5, WD24)
- Region
- Hertfordshire
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlord and commercial work in Woodside
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
What we can’t put right
Before booking, it’s worth knowing the limits:
- Structural movement, which needs a surveyor or engineer
- Walls that need new movement joints cut into them
- Cracking across the wall rather than at a joint
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly.
Surfaces we seal
- Brickwork movement joints
- Concrete & block
- Façade panels
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
FAQs for Woodside
Can you help a landlord with a rental near Garston station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Will you come out to Woodside?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Where are you based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
How often do external joints need resealing?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Every job carries our one-year guarantee.
Is there any odour?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Is there a guarantee?
Yes. There’s a 12-month guarantee on every job.
Can you seal joints between render and window frames?
Yes. Joints between dissimilar materials are a big part of external work. We use a flexible sealant suited to both surfaces.
Can I add another job to the visit?
Yes, we can. More than one area can be quoted together.
The process
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours for a handful of joints, longer for a whole elevation, and the area is left clean. Parking around Woodside is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Mention any parking rules near the property
- Clear the area around the work
- Plan for the work area to be out of bounds to pets and children
Getting a quote
We quote each job on its own. Just phone 0345 464 0079 or drop us an email with the details, and photos are welcome.
Read more
How to look after the new joints
After the cure time, these simple habits help:
- Leave the joints unpainted unless we’ve said otherwise
- Never let anyone fill a movement joint with mortar
- Check external joints each spring
- Show decorators and builders where the movement joints are
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
Walls and rooflines in Woodside
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like High Elms Manor (about 0.7 miles north-east) are a reminder that the area around Woodside 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.
Managing a site like Alban Wood Primary School and Nursery? Then its movement joints, gutters and trims need looking after like any other building’s. Homes close to Church of All Saints include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Woodside is about 2 miles north of Watford, in Hertfordshire. Whether you’re in the middle of Woodside or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Woodside is one of 381 places in Hertfordshire we cover. We also work in London, around 19 miles away.
Jobs for external mastic in WD25, WD5 and WD24 works the same way as everywhere else we cover. You will find streets such as High Road, Moss Road and Briar Road, and we cover them all. Woodside sits on or near the A405. We also cover Hunton Bridge (2 miles west), Cassiobury (2 miles south), Chandler's Cross (3 miles south-west), Colney Butts (3 miles south) and Bucks Hill (3 miles west). Further out, we also cover Hemel Hempstead (5 miles north-west), St Albans (5 miles north-east), Welwyn Garden City (12 miles north-east), Harpenden (9 miles north), Cheshunt (15 miles east) and Hatfield (9 miles north-east).
Local landmarks in Woodside
Around Woodside, our work takes us to homes and buildings near Woodside Playing Fields and Francis Combe Academy and the streets around them. The nearest railway station is Garston station, roughly 1 mile south-east. Well-known places in the area include Hertfordshire Fire Brigade Museum (2.9 miles south) and Hilfield Castle (4 miles south-east). The countryside around Woodside includes Longspring Wood and Verulamium Lake.
Why it’s worth doing now in Woodside
Water gets in through a failed movement joint, behind render and cladding. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Homes in smaller places like Woodside can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why book with us
- Quality sealants from Arbo and Everbuild
- We agree the colour with you first
- 20+ years of sealant experience
- White, clear, grey or coloured to suit, where the product allows
Read how sealant jobs are priced and customer reviews.
Common problems we fix in Woodside
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
If you can see any of these, it’s time to have the joints looked at:
- Rain getting behind render or cladding at a joint
- Joints with sealant missing in places
- Movement joints filled with mortar instead of sealant
- Failed sealant between panels on a façade
Rented homes near Garston station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- Are they insured?
- How long to leave it before use
- What happens if the job turns out different
- Is the old sealant removed completely?
DIY versus a professional finish
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.