Hertfordshire · England
External & façade joints in Oaklands, Hertfordshire
External mastic across Oaklands and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Brick movement joints where the sealant has split
- Sealant that has lost its bond to the brick or render
- Plants rooting in failed movement joints
External mastic for homes and businesses in Oaklands
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing. If you are dealing with old sealant gone brittle and cracked and joints pointed up with cement by mistake, we can help.
Houses in smaller places like Oaklands can stand more in the open than those in a built-up town, and walls and rooflines facing the weather take the worst of it. Joints on those sides are usually the first to go.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Where
- Oaklands (AL6)
- Region
- Hertfordshire
- Cover
- A year, on every job
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Oaklands
Can you help a landlord with a rental near Welwyn North station?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
Is Oaklands within the area you cover?
Yes. Oaklands is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
What does external mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we will talk you through it.
How long does external mastic take?
A typical job takes a few hours for a handful of joints, longer for a whole elevation. Your quote will say how long we expect yours to take.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Do you use backing rod?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back.
Do I have to be there?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
What’s an expansion joint in brickwork?
Walls move with heat, cold and moisture, so long walls have planned gaps to take that movement. It’s closed with backing rod and a flexible sealant.
When it is not the sealant
It helps to know what we can’t do too:
- Cracking across the wall rather than at a joint
- Render that is blown, hollow or coming away
- Subsidence or other structural problems
If in doubt, call 0345 464 0079 or email us and we will say what we think before you book.
Surfaces we seal
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
- Concrete & block
- Façade panels
What external mastic looks like in Oaklands
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Digswell House (about 1.8 miles south) nearby, there’s older building stock in the area around Oaklands as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
If you live in an older home near Church of St Michael and All Angels, the joints between older walls, newer extensions and the roofline need a sealant that can move. If you let a flat or house near Welwyn North station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Oaklands is about 3 miles north of Welwyn Garden City, in Hertfordshire. From the centre of Oaklands to the outskirts, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Our Hertfordshire coverage runs to 381 places, and Oaklands is one of them. You can also see our page for London, about 24 miles away.
We cover every part of AL6 for external mastic and the streets around it. Local streets include Briary Wood End, Lower Mardley Hill and Heathbrow Road. If you are just outside Oaklands, we cover Woolmer Green (1 mile north-east), Harmer Green (1 mile south-east), Burnham Green (1 mile south-east), Datchworth (2 miles north-east) and Knebworth (2 miles north). We also work in nearby towns such as Watford (15 miles south-west), Hemel Hempstead (13 miles south-west), Stevenage (5 miles north), St Albans (9 miles south-west), Bishop's Stortford (15 miles east) and Welwyn Garden City (3 miles south).
What’s near Oaklands
Around Oaklands, our work takes us to homes and buildings near Monk's Walk School, Danesbury Park and The North Star pub and the streets around them. For rail, the closest station is Welwyn North station, about 1.3 miles south. A little further out are Queen Elizabeth II Hospital (4.2 miles south) and Datchworth Museum (1.5 miles east). Not far away are Mardley Heath.
Places near Oaklands
Other services in Oaklands
Landlords, agents and businesses in Oaklands
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
How the visit works
There is not much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes a few hours for a handful of joints, longer for a whole elevation. A visit to Oaklands is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Clear items away from the joints we are working on
- Mention any tricky access
Get a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. Photos by email help us understand the job, and we’ll take it from there.
Read more
How we quote for external mastic
There’s no set price list. The quote depends on:
- The old material and how stubborn it is
- The number and length of the joints
- Which sealant suits the joint
- Working hours on commercial sites
The cost depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before any work starts.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Where the property is
- If someone has resealed it before
- Any access issues, like height or stairs
- Photos by email, if that is easy
For external mastic in Oaklands, phone 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.
Leave it or put it right?
Water gets in through a failed movement joint and can run behind render or cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. In an older home around Oaklands, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What you get with us
- Full insurance on every job
- We never seal over old sealant
- Arbo and Everbuild products
- Experience in homes, commercial sites and hotels
What the job involves on each surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Signs you need external mastic in Oaklands
Some movement joints have been pointed up with mortar. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Signs it’s time to call us include:
- Old sealant gone brittle and cracked
- Damp patches traced to an open external joint
- Movement joints filled with mortar instead of sealant
- Sealant that has lost its bond to the brick or render
If you look after a building such as Oaklands Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What to look for in a quote
- How long the guarantee is
- Whether they seal over old material or remove it
- How hidden problems are handled
- How the colour is chosen