Hampshire · England
Odiham External Mastic
We cover Odiham for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Sealant pulling away from one side of the joint
- Water getting into walls through failed joints
- Weeds or debris growing in open joints
Landlords, agents and businesses in Odiham
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
External mastic in Odiham
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. Common call-outs are for plants rooting in failed movement joints and joints with sealant missing in places, across joints between brick and frames, copings & trims and render & cladding joints.
Outbuildings, garages and conservatories around homes in places like Odiham add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
You are covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Location
- Odiham (RG29)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
Good joint work is mostly preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. For a job in Odiham, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Let us know about parking restrictions
- On commercial sites, let us know about site rules
- Tell us about any previous sealing or DIY attempts
Ask for a quote
For external mastic in Odiham, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before work begins.
Related advice
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Walk round the building once a year and look at the joints
- Act on the first splits you see
- Deal with leaking gutters that soak the joints below
- Keep movement joints as flexible joints, not mortar
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
What we are called out for in Odiham
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and rips as the joint opens.
If you can see any of these, it’s time to have the joints looked at:
- Water getting into walls through failed joints
- Weathered mastic that no longer stretches
- Joints pointed up with cement by mistake
- Leaking joints around cladding and façade panels
Letting a property close to Hook station? Then split movement joints are easy to miss on a rental until damp shows inside.
Comparing quotes
- Whether the sealant suits the joint
- Whether they seal over old material or remove it
- Which colour the sealant will be
- How much experience the applicator has
Walls and rooflines in Odiham
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Mayhill Junior School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around All Saints Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Odiham is about 4 miles west of Fleet, in Hampshire. We carry out external mastic for homeowners, landlords and businesses in Odiham, as part of our work across Hampshire. Odiham is one of 683 places in Hampshire we cover for external mastic. Reading is on our list too, around 14 miles away.
All of RG29 is within our area for external mastic. You’ll find streets such as Goodchild Square, High Street and London Road. We also cover North Warnborough (1 mile north-west), Broad Oak (1 mile north-east), Warnborough Green (1 mile north-west), Greywell (1 mile west) and Hook Common (2 miles north-west). Within a short drive, we also cover Basingstoke (7 miles west), Farnborough (8 miles east), Fleet (4 miles east), Aldershot (8 miles east), Alton (7 miles south) and Yateley (7 miles north-east).
Near you in Odiham
Around Odiham, our work takes us to homes and buildings near Robert May's School and The Bell Inn and the streets around them. The nearest railway station is Hook station, roughly 2.1 miles north-west of the centre. Other landmarks nearby include West Green House Agricultural Museum (3.3 miles north) and Odiham Castle (1.2 miles north-west). Not far away are Dogmersfield Lake and Tundry Hill.
Your questions about external mastic in Odiham
I let a flat near Hook station. Can you help?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Is Odiham in your area for external mastic?
Yes. Our work covers London and the South East, and Odiham is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Can you seal joints between two different materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
Will the old sealant be removed?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
How long does external mastic last?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and renew it when it starts to fail.
Are you insured?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What do you put in the joint?
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.
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- Any mould that needs treating
- The old material and how stubborn it is
- How easy the joints are to reach
- The size of the job
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
What we need to know
Photos by email are helpful but not essential. Please mention:
- The type of property
- The rough size of the job
- What’s wrong with the joints now
- If someone has resealed it before
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand.
Why act early in Odiham
Water gets in through a failed movement joint, behind render and cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. Homes in smaller places like Odiham can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
What you get with us
- A 12-month guarantee on all work
- 4.9 on Google from 180+ five-star reviews
- Arbo and Everbuild products
- Fully insured
Take a look at how sealant jobs are priced and what customers say.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
If you do try it yourself, take your time over the 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.