Hampshire · England
External Mastic in Well
Specialist external mastic for Well: careful preparation, the right product and tidy work. Call for a quick quote.
- Gaps where render, brick and frames meet
- Weeds or debris growing in open joints
- Old sealant gone brittle and cracked
What happens on the day
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 amount of work. In a small place like Well, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- 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
- For business premises, tell us about site rules or sign-in
- Mention any tricky access
- Let us know about parking restrictions
Getting a quote
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, ring 0345 464 0079 or send us an email.
Advice
External mastic for homes and businesses in Well
For buildings in Well, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. Typical jobs include water getting into walls through failed joints and gaps where render, brick and frames meet, on concrete & block, brickwork movement joints and joints between brick and frames.
Somewhere as small as Well, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- Well (RG29)
- Region
- Hampshire
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
External mastic in Well: local notes
Historic houses like Farnham Castle (about 4.8 miles east) are a reminder that the area around Well has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. 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 Bentley (Hampshire) station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. Schools such as Lord Wandsworth College are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Well is about 5 miles west of Farnham, in Hampshire. From the centre of Well to the outskirts, we cover external mastic for every kind of property. Our area takes in 683 places across Hampshire, from the larger towns to small villages. We also work in Reading, about 16 miles from Well.
All of RG29 is within our area for external mastic. If you’re just outside Well, we cover Long Sutton (1 mile west), South Warnborough (2 miles west), Odiham (3 miles north), Broad Oak (3 miles north) and North Warnborough (4 miles north-west). We also work in nearby towns such as Basingstoke (9 miles north-west), Farnborough (8 miles north-east), Fleet (5 miles north-east), Aldershot (7 miles east), Alton (5 miles south-west) and Petersfield (14 miles south).
Around Well
Well’s nearest station is Bentley (Hampshire) station, about 2.9 miles south-east. Other landmarks nearby include Fleet Community Hospital (5.8 miles north-east) and Barley Pound (2.2 miles east). Not far away are Holybourne Hill and Dogmersfield Lake.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Look over the joints every year, ideally after winter
- Point out the joints to other trades
- Check the sealant is paintable before painting near it
- Act on the first splits you see
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.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick, all bigger jobs than a reseal.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
We also work for property managers and facilities teams. Several sites can be quoted together.
Nearby places to Well
Also in Well
When to call us in Well
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and make things worse.
Look out for these signs:
- Moss and dirt in joints with no sealant left
- Failed seals between different materials
- Rain getting behind render or cladding at a joint
- Sealant pulling away from one side of the joint
In the older streets around Lord Wandsworth College Chapel, an extension built onto an older house moves differently, and the joint between them takes the strain.
Before you book anyone
- What the cure time is
- Whether VAT is included
- Are they insured?
- How the surfaces are prepared before sealing
Your questions about external mastic in Well
Do you cover Well for external mastic?
Yes, Well 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 let us know what needs doing.
Do you cover smaller places like Well?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is there any odour?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
Will the new joint stand out?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin from the range available.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Is it OK to fill a movement joint with cement?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose and can lead to cracking. A flexible sealant is the right fill.
Why act early in Well
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost around the joint, so the problem grows beyond the joint itself. Older cottages and farmhouses around Well can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
What you get with us
- ARBOMaster approved applicator
- Neat joints and a tidy finish
- 180+ five-star Google reviews
- Fully insured
Take a look at how sealant jobs are priced and customer reviews.
Can I do it myself?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
If you’re 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.
How we quote for external mastic
Your quote is based on your job. We take into account:
- Any working-time requirements on site
- Whether the work is at height
- How many areas need sealing
- Whether old sealant or filler has to be cut out
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The problem you’ve noticed
- The type of property
- Roughly how big the job is
- How we’d reach the joints
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear quote before any work starts.