Surrey · England
External Mastic in Cranleigh
Movement joints in Cranleigh need attention? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Rain getting behind render or cladding at a joint
- Rigid filler in a joint that should flex
- Old sealant gone brittle and cracked
How the visit works
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours for a handful of joints, longer for a whole elevation. Parking around Cranleigh is normally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Move anything stored near the joints
- Mention any tricky access
Get a quote
Want a quote for external mastic? Please call 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Read more
External mastic in Cranleigh, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing and we use one wherever it does. We’re often asked to deal with weathered mastic that no longer stretches and failed sealant between panels on a façade, across joints between brick and frames, copings & trims and render & cladding joints.
Homes around Cranleigh range from older cottages to newer houses, with walls and rooflines of every type. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
The work is covered for a year after we finish. If anything isn’t right with it, call 0345 464 0079 or drop us an email.
- Place
- Cranleigh (GU6)
- Wider area
- Surrey
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Different surfaces, different methods
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. We reseal them with a low-modulus sealant over backing rod in a colour to suit the brick.
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. A primer goes on where the product requires one before sealing.
Common problems we fix in Cranleigh
If plants are growing out of a joint, the sealant has generally failed or was never there. Roots and dirt hold water against the wall and make things worse.
Look out for these signs:
- Plants rooting in failed movement joints
- Sealant that has lost its bond to the brick or render
- Cracked joints where brick meets render or frames
- Weathered mastic that no longer stretches
If you look after a building such as St Cuthbert Mayne Catholic Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Comparing quotes
- Who turns up on the day
- Is the old sealant removed completely?
- Whether they’re fully insured
- Whether the sealant suits the joint
Places near Cranleigh
More services for Cranleigh
Walls and rooflines in Cranleigh
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to Church of St Nicholas include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Cranleigh is about 8 miles south-east of Guildford, in Surrey. We provide external mastic to householders, landlords and businesses in Cranleigh and the surrounding area. Our area takes in 395 places across Surrey, from the larger towns to small villages. Crawley is on our list too, around 13 miles away.
Jobs for external mastic in GU6 works the same way as everywhere else we cover. If you need external mastic at a property on High Street, Taverner Square and Bridge Road or a nearby road, we can help. Being close to the B2128, Cranleigh is simple for us to get to. If you are just outside Cranleigh, we cover Ewhurst (2 miles east), Ewhurst Green (2 miles east), Mayes Green (4 miles east), Walliswood (4 miles east) and Ellen's Green (4 miles south-east). We also work in nearby towns such as Guildford (8 miles north-west), Woking (13 miles north), Horley (14 miles east), Redhill (15 miles north-east), Farnham (14 miles west) and Reigate (14 miles north-east).
Landmarks near Cranleigh
In Cranleigh, that means homes and buildings near Sayer's Croft LNR and Glebelands School, among other places.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
What affects the cost of external mastic
We do not publish a price list, because jobs vary so much. The quote depends on:
- The amount of work
- Whether the work is at height
- The type of sealant required
- Any working-time requirements on site
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you’re unsure, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- Where the job is, and your postcode
- The rough size of the job
- If someone has resealed it before
- Whether it’s a home or a business
There’s no standard price list, because every job is different. Instead, we give you a clear quote for your job. To get started, phone 0345 464 0079 or send us an email.
Questions from Cranleigh
Is Cranleigh in your area for external mastic?
Yes. We work across London and the South East, and Cranleigh is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Will you come out to Cranleigh?
Yes, Cranleigh is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can a movement joint be filled with mortar?
No. Rigid materials can’t move with the wall. Where a joint has been mortared, it can often be raked out and sealed properly.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
When is the sealant fully cured?
Cure times vary by product. Before we leave, we will tell you the cure time.
Can landlords and businesses book you?
Yes, we do. Domestic, commercial and hotel work are all part of what we do, and we’re fully insured.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages.
For landlords and businesses
For anyone letting property in or around Cranleigh, several properties can be quoted together. Just tell us the addresses and what each one needs.
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Why it’s worth doing now in Cranleigh
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. Around Cranleigh, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
Doing several joints on one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why choose Mr Mastic in Cranleigh
- A choice of colours where the product allows
- More than 20 years in sealant work
- Colour picked to suit the job
- One-year guarantee on every job
Take a look at what affects the cost or our reviews.