Hampshire · England
Lower Farringdon External Mastic
External mastic in Lower Farringdon from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Weeds or debris growing in open joints
- Movement joints filled with mortar instead of sealant
- Joints with sealant missing in places
How we quote for external mastic
Call for a quick quote. The main things that affect it are:
- The amount of work
- Mould in or behind the old joints
- The number of rooms or windows
- Whether old sealant or filler has to be cut out
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
What to tell us for a quote
When you call or email, it’s useful to know:
- Any previous sealing or DIY work
- Roughly how big the job is
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
There’s no standard price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or drop us an email.
External mastic for homes and businesses in Lower Farringdon
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. We work on concrete & block, copings & trims and joints between brick and frames, and people most often call us about failed sealant between panels on a façade and hard, crazed mastic that has stopped moving.
Outside joints can only be sealed when they’re dry, so work in Lower Farringdon is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
A 12-month guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- Lower Farringdon (GU34)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- Clear growth from the base of walls and joints
- Fix overflowing gutters above sealed joints
- Avoid pressure-washing directly into sealant joints
- Leave the joints unpainted unless we’ve said otherwise
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years.
Lower Farringdon questions
Do you cover Lower Farringdon for external mastic?
Yes. Our work covers London and the South East, and Lower Farringdon is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.
I let a flat near Alton station. Can you help?
Yes. We work for letting agents and landlords as well as householders, and several properties can be quoted together. You can ring 0345 464 0079 or email us with the details for a clear quote.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before resealing.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll explain our choice.
Can I add another job to the visit?
Of course. Combining jobs makes good use of the visit.
How often do external joints need resealing?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Every job carries our 12-month guarantee.
Do you guarantee your work?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we’ll put it right.
What information do you need?
Let us know what needs doing and where, with pictures by email if possible. If we need more, we’ll ask.
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, instead of the wall and finishes around it. Older cottages and farmhouses around Lower Farringdon can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
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 drop us an email and we will give you an honest view and a quote.
Why book with us
- Neat joints and a tidy finish
- You choose the colour before work begins
- An ARBOMaster approved applicator
- Homes, businesses and hotels
Read what affects the cost and what customers say.
How the job changes by surface
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so its sealant has to stay flexible.
Places near Lower Farringdon
What else we do in Lower Farringdon
Landlord and commercial work in Lower Farringdon
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
Outside joints around Lower Farringdon
Historic houses like Bentworth Hall (about 3.5 miles north-west) are a reminder that the area around Lower Farringdon 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. 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.
If you live in an older home near Church of All Saints, older walls, gutters and the joints where extensions meet them need a flexible sealant. Rented homes near Alton station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Lower Farringdon is about 3 miles south of Alton, in Hampshire. From the centre of Lower Farringdon to the outskirts, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Lower Farringdon is one of 683 towns and villages in Hampshire we cover for external mastic. For nearby work, see our Portsmouth page.
We cover every part of GU34 for external mastic. We cover properties on Gosport Road, Brightstone Lane and Shirnall Meadow. We also cover the places around Lower Farringdon: Farringdon (1 mile east), Upper Farringdon (1 mile east), Chawton (2 miles north), Hartley Mauditt (2 miles east) and Alton (3 miles north). Further out, we also cover Basingstoke (12 miles north-west), Winchester (14 miles west), Fleet (13 miles north-east), Horndean (14 miles south), Aldershot (14 miles north-east) and Petersfield (8 miles south).
Landmarks near Lower Farringdon
Around Lower Farringdon, our work takes us to homes and buildings near Royal Oak pub and the streets around them. Lower Farringdon’s nearest station is Alton station, roughly 3 miles north of the centre. Well-known places in the area include Alton Community Hospital (2 miles north) and The Romany Museum (2.6 miles south-east). The countryside around Lower Farringdon includes Red Hill.
Honest limits
It helps to know what we can’t do:
- Failed render or damaged cladding panels
- Damp that isn’t coming from the joint
- Walls that need new movement joints cut into them
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
- Façade panels
- Brickwork movement joints
How it works
At the end, we look at the finished work together and explain the cure time. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on how much there is to do. Somewhere as small as Lower Farringdon, 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.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Move anything stored near the joints
- On commercial sites, let us know about site rules
Ask for a quote
Every job is quoted individually. Just call 0345 464 0079 or drop us an email with the details and send pictures if you have them.