Oxfordshire · England
External Mastic in Tackley
External mastic for Tackley, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Old sealant gone brittle and cracked
- Panel joints letting water in
- Weeds or debris growing in open joints
External mastic in Tackley
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. If you have cracked joints where brick meets render or frames and movement joints with cracked, split or missing sealant, we can put it right.
External sealant needs dry, clean surfaces, so work around Tackley is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
There’s a 12-month guarantee on every job, large or small.
- Where
- Tackley (OX5)
- Region
- Oxfordshire
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlord and commercial work in Tackley
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
What happens on the day
At the end, we look at the finished work together and explain the cure time. The visit itself normally takes anything from a few hours to several days, depending on the building, depending on the size of the job. For a village or hamlet like Tackley, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Try not to wet indoor joints just before the visit
- Mention if the joints have been sealed before
Ask for a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few photos by email make the job easier to understand, and we’ll take it from there.
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DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Tackley questions
I let a flat near Tackley station. Can you help?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Is Tackley within the area you cover?
Yes, Tackley is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
What is backing rod for?
Backing rod goes into deeper joints as a matter of course. It sets the sealant depth and prevents three-sided bonding.
Do you have insurance?
Yes. We are fully insured, and we can confirm the details when we quote.
How often do external joints need resealing?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and reseal when it splits.
Where is Mr Mastic based?
We’re a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
When is the sealant fully cured?
Cure times vary by product and the temperature. Before we leave, we’ll tell you the cure time.
Do you work at height?
That depends on the building and the joints. We work on joints that can be reached safely. Tell us about the building and we will confirm what access is needed.
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Leave the joints unpainted unless we’ve said otherwise
- Avoid pressure-washing directly into sealant joints
- Act on the first splits you see
- Keep movement joints as flexible joints, not mortar
Do not let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
Nearby places to Tackley
More services for Tackley
External mastic in Tackley: local notes
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. Historic houses like Blenheim Palace (about 3.8 miles south-west) are a reminder that the area around Tackley has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
If you look after a building such as Tackley Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Rented homes near Tackley station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Tackley is about 6 miles west of Bicester, in Oxfordshire. Anywhere in OX5, we can carry out external mastic at your property. Our area takes in 443 places across Oxfordshire. For nearby work, see our Oxford page.
Every address in OX5 is covered for external mastic. We cover properties on Nethercote Road, St Nicholas Road and St Johns Road. If you are just outside Tackley, we cover Bunkers Hill (2 miles south), Shipton-on-Cherwell (2 miles south), Wootton (3 miles west), Thrupp (3 miles south) and Woodstock (3 miles south-west). We also work in nearby towns such as Oxford (10 miles south), Banbury (13 miles north), Bicester (6 miles east), Abingdon-on-Thames (14 miles south), Witney (10 miles south-west) and Carterton (15 miles south-west).
Landmarks near Tackley
Around Tackley, our work takes us to homes and buildings near The Gardiner Arms and the streets around them. There’s a railway station in Tackley itself: Tackley station. Nearby you will also find Soldiers of Oxfordshire Museum (3.4 miles south-west). Green spaces nearby include Woodsides Meadow.
Surface by surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
What happens if it’s left?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost near the open joint, so the problem grows beyond the joint itself. In a small place like Tackley, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
What you get with us
- Sealant colour chosen to suit
- An ARBOMaster approved applicator
- 4.9 on Google from 180+ five-star reviews
- We agree the colour with you first
Take a look at our cost guide and what customers say.
Common problems we fix in Tackley
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
These are the problems we are asked about most:
- Movement joints filled with mortar instead of sealant
- Leaking joints around cladding and façade panels
- Joints where the bead has come unstuck
- Cracked joints where brick meets render or frames
If you live in an older home near Church of St Nicholas, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Comparing quotes
- What product goes in the joint
- Whether you can choose the colour
- How hidden problems are handled
- What guarantee comes with the work