Surrey · England
External Mastic in South Holmwood
External mastic for South Holmwood and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Joints with sealant missing in places
- Gaps where render, brick and frames meet
- Sealant pulling away from one side of the joint
The process
Before we leave, we go over the finished joints with you. The work 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 South Holmwood, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
- Clear items away from the joints we are working on
How to get a quote
There’s no standard price list, because every job is different. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or drop us an email.
Advice
External mastic for homes and businesses in South Holmwood
Low-level joints can normally be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we will confirm what access is needed. We are often asked to deal with panel joints letting water in and weathered mastic that no longer stretches, on concrete & block, render & cladding joints and copings & trims.
Somewhere as small as South Holmwood, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
You are covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or send us an email.
- Place
- South Holmwood (RH5)
- Wider area
- Surrey
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to South Holmwood
Other services in South Holmwood
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We cut it out and start again.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
What the job involves on each surface
Copings and trims
A failed coping joint lets water into the top of the wall. Resealing them is a small job that protects a lot.
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it and keep the sealant to the right depth.
What external mastic looks like in South Holmwood
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. With historic houses such as Polesden Lacey (about 5 miles north-west) nearby, there’s older building stock in the area around South Holmwood 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 let a flat or house near Holmwood station, outside joints that have cracked can let damp into a rental, so check them between lets. In the older streets around Church of St Mary Magdalene, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
South Holmwood is about 3 miles south of Dorking, in Surrey. Our applicators cover external mastic for homeowners, landlords and businesses in South Holmwood. 395 places in Surrey are on our list, large and small. We also work in Crawley, around 8 miles away.
We work across the RH5 postcode area for external mastic and the streets around it. You’ll find streets such as Warwick Road, Norfolk Road and Milford Court. Nearby, we also carry out external mastic in Holmwood Corner (1 mile south-east), Beare Green (1 mile south), Coldharbour (2 miles south-west), Friday Street (3 miles west) and Abinger Bottom (3 miles west). Further out, we also cover Guildford (11 miles west), Woking (14 miles north-west), Epsom (10 miles north), Horley (7 miles east), Redhill (7 miles north-east) and Ewell (12 miles north).
Near you in South Holmwood
Around South Holmwood, our work takes us to homes and buildings near Inholms Clay Pit and The Norfolk Arms. The closest station to South Holmwood is Holmwood station, roughly 0.8 miles south of the centre. Other landmarks nearby include Mesolithic Museum (3.6 miles west) and Betchworth Castle (3.4 miles north). For a walk, there’s Leith Hill and Vann Lake.
South Holmwood: your questions answered
Do you work for landlords with property near Holmwood station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Is South Holmwood in your area for external mastic?
Yes. We work across London and the South East, and South Holmwood is part of that. Just call 0345 464 0079 or email us with a few details of the job, and we will give you a clear price.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render. Exterior sealants come in a good range of colours.
How do you reach high-level joints?
It depends on the height and the site. Ground-floor joints are simple; for higher work, tell us about the building and we will confirm what’s needed.
Is it OK to fill a movement joint with cement?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
How long will you be here?
Typically it takes anything from a few hours to several days, depending on the building. Larger jobs naturally take longer.
Do you need external mastic in South Holmwood?
A lot of failed joints come down to preparation: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
People usually contact us after spotting one of these:
- Weathered mastic that no longer stretches
- Moss and dirt in joints with no sealant left
- Joints pointed up with cement by mistake
- Sealant that has lost its bond to the brick or render
For site and facilities teams at buildings such as The Priory CofE Voluntary Aided School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Questions to ask before booking
- What the quote includes, VAT included or not
- Is the old sealant removed completely?
- How hidden problems are handled
- What the cure time is
When something else is needed
Before you book, it’s worth knowing the limits too:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Failed render or damaged cladding panels
- Cutting new joints into brickwork, which is building work rather than sealant work
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly before you book.
Where we work in South Holmwood
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Joints between brick and frames
Landlords, agents and businesses in South Holmwood
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
For anyone letting property in or around South Holmwood, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
What happens if it’s left?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. Older cottages and farmhouses around South Holmwood can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why choose Mr Mastic in South Holmwood
- We agree the colour with you first
- Anti-fungal silicone where joints get wet
- A 12-month guarantee on all work
- Fully insured