Oxfordshire · England
Tidmarsh External Mastic
Problem with your movement joints in Tidmarsh? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Joints pointed up with cement by mistake
- Plants rooting in failed movement joints
- Joints where the bead has come unstuck
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way. Older cottages and farmhouses around Tidmarsh can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
What it costs depends on the amount of work, how hard the old material is to remove and access to the work. We give a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Tidmarsh
- 4.9 on Google from 180+ five-star reviews
- Anti-fungal sanitary silicone in wet areas
- An ARBOMaster approved applicator
- A 12-month guarantee on all work
About our external mastic in Tidmarsh
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall. Typical jobs include leaking joints around cladding and façade panels and weeds or debris growing in open joints, on concrete & block, copings & trims and joints between brick and frames.
Around Tidmarsh, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
Each job carries a 12-month guarantee, large or small.
- Location
- Tidmarsh (RG8)
- Region
- Oxfordshire
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
If you are 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.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
The process
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes anything from a few hours to several days, depending on the building. In a small place like Tidmarsh, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Mention if the joints have been sealed before
- Mention any parking rules near the property
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
To get a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before we start.
Advice
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Keep high-pressure jets off the joints
- Make sure movement joints aren’t pointed over
- Act on the first splits you see
- Check the sealant is paintable before painting near it
Don’t paint over the new sealant unless we’ve said the product is paintable. Many exterior sealants aren’t designed to be painted.
Act while the splits are small. Then it’s a straightforward cut-out and reseal.
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
For anyone letting property in or around Tidmarsh, several properties can go on one quote. Send us the addresses and the work at each.
Nearby places to Tidmarsh
What else we do in Tidmarsh
Walls and rooflines in Tidmarsh
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Mapledurham House (about 2.5 miles north-east) are a reminder that the area around Tidmarsh has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Rented homes near Pangbourne station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. For an older house near a landmark such as Church of St Laurence, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Tidmarsh is about 5 miles west of Reading, in Oxfordshire. If you need external mastic in Tidmarsh, please call 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Oxfordshire. Tidmarsh is one of 443 places in Oxfordshire where we work for external mastic.
Postcode districts we cover here for external mastic: RG8. That includes homes and businesses on Strachey Close and Tidmarsh Lane. Nearby, we also carry out external mastic in Sulham (1 mile east), Pangbourne (1 mile north), Whitchurch-on-Thames (1 mile north), Little Heath (2 miles south-east) and Englefield (2 miles south). Further out, we also cover Didcot (12 miles north-west), Henley-on-Thames (9 miles north-east), Benson (10 miles north), Wallingford (9 miles north), Great Western Park (12 miles north-west) and Watlington (13 miles north).
Landmarks near Tidmarsh
Typical jobs here are in homes near Denefield School and The Cross Keys pub and the streets around them. For rail, the closest station is Pangbourne station, roughly 1.1 miles north. Other landmarks nearby include Thames Valley Police Museum (3.5 miles south) and Battle Hospital (4 miles east). Green spaces nearby include Moor Copse Nature Reserve and Hosehill Lake.
Common problems we fix in Tidmarsh
A lot of failed joints come down to preparation: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Keep an eye out for any of the following:
- Joints with sealant missing in places
- Panel joints letting water in
- Rigid filler in a joint that should flex
- Old sealant gone brittle and cracked
For site and facilities teams at buildings such as Pangbourne Primary School, larger buildings have long runs of movement joint that eventually need resealing.
What your quote should include
- Who turns up on the day
- Is VAT in the price?
- Are they insured?
- How long to leave it before use
How we quote for external mastic
Your quote is based on your job. We take into account:
- Mould in or behind the old joints
- The product the joint needs
- The amount of work
- 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 call 0345 464 0079 or email us.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- A few pictures by email, if you can
- If someone has resealed it before
- Access, such as stairs, a lift or height
- Where the job is, and your postcode
Every job is quoted individually, so start by telling us what you need. Simply call 0345 464 0079 or email us and describe the job and send pictures if you have them.
Tidmarsh: your questions answered
Can you do external mastic in Tidmarsh?
Yes, Tidmarsh is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job.
Is Tidmarsh within the area you cover?
Yes, Tidmarsh is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can a movement joint be filled with mortar?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose, and the wall may crack nearby. A flexible sealant is the right fill.
How often do external joints need resealing?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Every job carries our 12-month guarantee.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
Do you guarantee your work?
Yes, for a year. If anything isn’t right with the work within the year, let us know and we’ll sort it.
Will the new joint stand out?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so the joint doesn’t draw the eye.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.