Oxfordshire · England
Whitchurch Hill External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Whitchurch Hill and across Oxfordshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Old sealant gone brittle and cracked
- Sealant pulling away from one side of the joint
- Water getting into walls through failed joints
External mastic in Whitchurch Hill
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two. We work on joints between brick and frames, brickwork movement joints and copings & trims, and the jobs we see most are plants rooting in failed movement joints and sealant that has lost its bond to the brick or render.
In a village or hamlet like Whitchurch Hill, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Whitchurch Hill (RG8)
- Wider area
- Oxfordshire
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
After the cure time, these simple habits help:
- Have failed joints looked at early
- Avoid pressure-washing directly into sealant joints
- Tell anyone working on the walls about the movement joints
- Check external joints each spring
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
What the job involves on each surface
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best year round.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Places near Whitchurch Hill
More services for Whitchurch Hill
Whitchurch Hill buildings and the weather
With historic houses such as Basildon Park (about 2 miles west) nearby, there’s older building stock in the area around Whitchurch Hill as well as newer homes. Where a home is older, 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around St John the Baptist, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Rented homes near Pangbourne station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. For site and facilities teams at buildings such as The Oratory Preparatory School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Whitchurch Hill is about 5 miles north-west of Caversham, in Oxfordshire. Homes, rented property, offices and hotels in Whitchurch Hill can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Across Oxfordshire, we cover 443 places, Whitchurch Hill among them. There’s also a page for Reading, about 6 miles away.
Our applicators cover all of RG8 for external mastic. Streets in the area include Bec Tithe, Oakdown Close and Hill Bottom Close, and we cover them all. Other places close to Whitchurch Hill include Cray's Pond (1 mile north), Woodcote (2 miles north), Hook End (2 miles north-east), Cane End (2 miles east) and Checkendon (3 miles north-east). Larger places within reach include Didcot (10 miles north-west), Abingdon-on-Thames (15 miles north-west), Henley-on-Thames (8 miles east), Benson (8 miles north), Chinnor (15 miles north-east) and Tilehurst (4 miles south-east).
Landmarks near Whitchurch Hill
Typical jobs here are in homes near Whitchurch Primary School, Langtree School and The Sun pub. The closest station to Whitchurch Hill is Pangbourne station, roughly 1.6 miles south. Nearby you’ll also find Battle Hospital (4.8 miles south-east). For a walk, there’s Hartslock.
When something else is needed
We’ll always be straight with you, so here’s what new sealant will not do:
- Subsidence or other structural problems
- Loose or hollow render, which needs re-rendering
- Adding movement joints to masonry that has none
If you’re not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer before booking.
What we seal
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
- Façade panels
- Render & cladding joints
The process
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes anything from a few hours to several days, depending on the building, and the area is left clean. For a village or hamlet like Whitchurch Hill, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- 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.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us about any water getting in
- Keep pets and children clear of the area while we work
Get a quote
Every job is quoted individually, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details, and photos are welcome.
Read more
Why act early in Whitchurch Hill
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render near the open joint, so the damage spreads beyond the joint. Where a wall is exposed, as many are in small places like Whitchurch Hill, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
No two jobs are quite the same, 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 will explain the quote if you ask.
Why choose Mr Mastic in Whitchurch Hill
- You choose the colour before work begins
- 4.9 on Google from 180+ five-star reviews
- 12-month guarantee on every job
- Approved under the ARBOMaster scheme
Take a look at what affects the cost and customer reviews.
FAQs for Whitchurch Hill
Do you work for landlords with property near Pangbourne station?
Yes, rental work is part of what we do. 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 Whitchurch Hill in your area for external mastic?
Yes, Whitchurch Hill is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few photos.
How long before the joint can be used?
It depends on the product. We tell you how long to leave it before we go.
What is backing rod for?
That’s backing rod, a closed-cell foam. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little.
How long does external mastic last?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
Which products do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
How we quote for external mastic
Your quote is based on your job. We look at:
- The product the joint needs
- The number and length of the joints
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or send us an email and we’ll talk you through it.
What to tell us for a quote
What to tell us when you ask for a quote:
- How many joints, rooms or windows are involved
- A few pictures by email, if you can
- The address or postcode of the job
- Access, such as stairs, a lift or height
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
For landlords and businesses
Housing providers, facilities teams and property managers book us too in Whitchurch Hill and across Oxfordshire. Several sites can be quoted together, and we are fully insured.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.