Oxfordshire · England
External Mastic in Cogges
Professional external mastic in and around Cogges, with old sealant always removed completely.
- Panel joints letting water in
- Rain getting behind render or cladding at a joint
- Moss and dirt in joints with no sealant left
External mastic for homes and businesses in Cogges
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. If you have rain getting behind render or cladding at a joint and gaps where render, brick and frames meet, we can help, on joints between brick and frames, brickwork movement joints and façade panels alike.
Homes around Cogges range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Cogges (OX28, OX29)
- Region
- Oxfordshire
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Cogges
Some jobs are bigger than they look, and some smaller. The main factors:
- Any working-time requirements on site
- Mould in or behind the old joints
- Which sealant suits the joint
- Whether the work is at height
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Where the property is
- A few pictures by email, if you can
- The problem you’ve noticed
- Whether it has been sealed before
Every job is quoted individually. Simply phone 0345 464 0079 or drop us an email and describe the job.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Clear growth from the base of walls and joints
- Never let anyone fill a movement joint with mortar
- Check external joints each spring
- Wash walls gently around the sealant
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established.
Why it’s worth doing now in Cogges
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly once. In an older home around Cogges, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Doing several joints on one visit usually makes better use of the time than several visits. We will give you a clear quote for the lot.
Why Cogges clients choose us
- Every job guaranteed for a year
- Colour agreed with you before any work starts
- Full insurance on every job
- A sealant colour to suit the surroundings
Read what affects the cost and what customers say.
FAQs for Cogges
Will you come out to Cogges?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is Cogges in your area for external mastic?
Yes, Cogges is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear quote.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
Is it OK to fill a movement joint with cement?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose. We’ll reseal it with a flexible sealant.
Do you work for letting agents?
Yes. Domestic, commercial and hotel work are all part of what we do.
Do you guarantee your work?
Yes. Every job comes with our 12-month guarantee.
I’m a tenant. Can you help?
Of course. Ask your landlord first, and we can send them the quote if that helps.
Where do you work from?
Our base is Crawley. We work across South East England, London and Scotland.
Towns and villages near Cogges
More services for Cogges
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
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 doesn’t work out, we can still put it right.
When to call us in Cogges
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
Common reasons people contact us include:
- Water getting into walls through failed joints
- Old sealant gone brittle and cracked
- Rigid filler in a joint that should flex
- Failed seals between different materials
If you look after a building such as The Blake Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s.
What your quote should include
- Are they insured?
- What the quote includes, VAT included or not
- Whether you can choose the colour
- Who turns up on the day
How the job changes by surface
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant coloured to suit the wall.
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. We choose the product to suit.
Outside joints around Cogges
Historic houses like Minster Lovell Hall (about 2.5 miles north-west) are a reminder that the area around Cogges 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. 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.
Homes close to Church of St Mary include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain. For landlords with property near Finstock station, split movement joints are easy to miss on a rental until damp shows inside.
Cogges is about 1 mile east of Witney, in Oxfordshire. We carry out external mastic for homes and businesses in Cogges, as part of our work across Oxfordshire. Cogges is one of 443 towns and villages in Oxfordshire where we work for external mastic. You can also see our page for Oxford, roughly 11 miles from Cogges.
Postcode districts we cover here for external mastic: OX28 and OX29. Local streets include Mead Lane, Puck Lane and Manor Road, all of which we cover. Cogges is on the A4095, so it’s easy for us to get to with everything needed for external mastic. Close by, we work in Witney (1 mile west), Madley Park (1 mile north-east), High Cogges (1 mile east), Ducklington (1 mile south) and South Leigh (2 miles east). Larger places within reach include Oxford (11 miles east), Abingdon-on-Thames (11 miles south-east), Carterton (5 miles west), Wantage (13 miles south), Grove (12 miles south) and Faringdon (10 miles south-west).
What’s near Cogges
Typical jobs here are in homes near The Griffin Inn, The Henry Box School and Wood Green School. The closest station to Cogges is Finstock station, about 4.8 miles north of the centre. Well-known places in the area include Cogges Manor Farm Museum (under half a mile north-east).
How it works
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours to a few days, depending on the length of joint and the access. A visit to Cogges is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Keep pets and children clear of the area while we work
- Clear the area around the work
- Let us know about parking restrictions
How to get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work.