Hampshire · England
External Mastic in Bidden
Sealing brickwork movement joints, render, cladding and façade joints for Bidden, backed by a one-year guarantee. Call for a quick quote.
- Movement joints with cracked, split or missing sealant
- Failed seals between different materials
- Weathered mastic that no longer stretches
Can I do it myself?
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.
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 handle external mastic in Bidden
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a colour to suit. We work on brickwork movement joints, façade panels and concrete & block, and common reasons people get in touch are damp patches traced to an open external joint and gaps where render, brick and frames meet.
Outside joints can only be sealed when they’re dry, so work in Bidden is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Bidden (RG25)
- Wider area
- Hampshire
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
When to call us in Bidden
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
It’s worth asking for a quote if you see:
- Plants rooting in failed movement joints
- Joints where the bead has come unstuck
- Joints pointed up with cement by mistake
- Water getting into walls through failed joints
Managing a site like Robert May's School? Then its movement joints, gutters and trims need looking after like any other building’s.
What your quote should include
- Whether all the old sealant comes out first
- Who does the work, and how experienced they are
- How long to leave it before use
- What guarantee comes with the work
What happens on the day
You don’t need to clear the whole room or building, only the area right around the joints. We protect the rest, and the job takes a few hours to a few days, depending on the length of joint and the access in most cases. In a small place like Bidden, access is generally the main thing to plan. 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
- Let us know about stairs, lifts or work at height
- Plan for the work area to be out of bounds to pets and children
- Tell us about any previous sealing or DIY attempts
Get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, phone 0345 464 0079 or email us.
Advice
What the job involves on each surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so the movement is taken up.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
Walls and rooflines in Bidden
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of St Mary, older walls, gutters and the joints where extensions meet them need a flexible sealant. If you let a flat or house near Hook station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Bidden is about 4 miles south of Hook, in Hampshire. From the centre of Bidden to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Hampshire, we cover 683 places, and Bidden is one of them. For nearby work, see our Reading page (15 miles or so).
We cover every part of RG25 for external mastic and the streets around it. Local streets include Bidden Road, Elder Dell and Meadowside, all of which we cover. If you’re just outside Bidden, we cover Little Hoddington (1 mile west), South Warnborough (1 mile south-east), Long Sutton (2 miles east), Greywell (2 miles north-east) and Up Nately (2 miles north). Larger places within reach include Basingstoke (5 miles north-west), Farnborough (11 miles north-east), Fleet (7 miles north-east), Aldershot (10 miles east), Alton (6 miles south) and Yateley (10 miles north-east).
Local landmarks in Bidden
In Bidden, that means homes and buildings near Hoddington Arms Public House, among other places. The nearest railway station is Hook station, roughly 3.6 miles north. Other landmarks nearby include Gliding Heritage Centre (3.4 miles south-west) and Odiham Castle (2.5 miles north-east). Not far away are The Mill Field and Holybourne Hill.
FAQs for Bidden
Do you work for landlords with property near Hook station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Is Bidden in your area for external mastic?
Yes. Our work covers London and the South East, and Bidden is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Do you have insurance?
Yes. We’re fully insured.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Do you guarantee your work?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we will put it right.
When will the joints need doing again?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Every job carries our 12-month guarantee.
What is backing rod for?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only, which would stop it stretching.
How do I get a quote for external mastic in Bidden?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before we start.
Also in Bidden
Landlords, agents and businesses in Bidden
If you manage several properties in or around Bidden, several properties can go on one quote. Send us the addresses and the work at each, and photos by email help.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
When it is not the sealant
To be straight with you, there are a few things sealant will not fix:
- Movement that’s more than a sealant joint can take
- Damp that is not coming from the joint
- Render that’s blown, hollow or coming away
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think before you book.
Where we work in Bidden
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Joints between brick and frames
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Show decorators and builders where the movement joints are
- Ask before painting over external sealant
- Act on the first splits you see
- Check external joints each spring
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.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.