Surrey · England
External & façade joints in Walliswood, Surrey
Specialist external mastic for Walliswood: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Panel joints letting water in
- Sealant pulling away from one side of the joint
- Hard, crazed mastic that has stopped moving
Common questions in Walliswood
Do you cover smaller places like Walliswood?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is Walliswood in your area for external mastic?
Yes, Walliswood is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Can you seal joints between two different materials?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides with primer where required.
What does external mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll tell you what we’re using.
Will it make a mess?
No. The area is protected while we work and cleaned up afterwards.
Can landlords and businesses book you?
Yes. We work in homes, commercial premises and hotels.
How we handle external mastic in Walliswood
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. Typical jobs include panel joints letting water in and joints with sealant missing in places, on copings & trims, concrete & block and brickwork movement joints.
Outside joints can only be sealed when they’re dry, so work in Walliswood is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
We stand behind the work with a 12-month guarantee.
- Place
- Walliswood (RH5)
- Region
- Surrey
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why act early in Walliswood
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together and it means sorting access once. Around Walliswood, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Call for a quick quote and we will go through it with you.
Why us?
- We never seal over old sealant
- White, clear, grey or another colour, product permitting
- Anti-fungal sanitary silicone in wet areas
- Neat joints and a tidy finish
Take a look at what affects the cost or customer reviews.
External mastic in Walliswood: local notes
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Ockley station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Walliswood is about 6 miles north-west of Horsham, in Surrey. We provide external mastic to homes and businesses in Walliswood and the surrounding area. Walliswood is one of 395 places in Surrey where we work for external mastic. You can also see our page for Crawley, about 9 miles away.
Work in RH5 works the same way as everywhere else we cover. If you need external mastic at a property on Horsham Road, Standon Lane and Oakfields or a nearby road, we can help. Nearby, we also carry out external mastic in Mayes Green (1 mile north), Ewhurst Green (2 miles north-west), Ellen's Green (2 miles south-west), Ewhurst (2 miles north-west) and Cranleigh (4 miles west). Larger places within reach include Guildford (11 miles north-west), Woking (15 miles north-west), Epsom (15 miles north), Horley (11 miles east), Redhill (12 miles north-east) and Reigate (11 miles north-east).
Around Walliswood
Typical jobs here are in homes near Wallis Wood and The Scarlett Arms Public House, among other places. Walliswood’s nearest station is Ockley station, about 3.1 miles north-east of the centre. Well-known places in the area include Abinger Castle (4.8 miles north) and Horsham Hospital (5.5 miles south-east). Open spaces near Walliswood include Vann Lake and Leith Hill.
How the visit works
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the job takes anything from a few hours to several days, depending on the building in most cases. Somewhere as small as Walliswood, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Mention any tricky access
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
Getting a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work.
Read more
Looking after it afterwards
To keep the joints looking good and working properly:
- Keep high-pressure jets off the joints
- Get split or bare joints resealed while the damage is small
- Ask before painting over external sealant
- Show decorators and builders where the movement joints are
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
Once a joint can’t move, the wall finds another way, generally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Common problems we fix in Walliswood
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
Common reasons people contact us are:
- Water getting into walls through failed joints
- Sealant that has lost its bond to the brick or render
- Joints pointed up with cement by mistake
- Brick movement joints where the sealant has split
If you live in an older home near Church of St John the Baptist, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Before you book anyone
- What happens if they find a problem under the old sealant
- Which colour the sealant will be
- What preparation is included
- What product goes in the joint
Towns and villages near Walliswood
What else we do in Walliswood
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Failed render or damaged cladding panels
- Cracks in the bricks or render themselves, away from the joints
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Where we work in Walliswood
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
- Façade panels
Surface by surface
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.