Mastic sealing for building owners and managing agents in Merton, Oxfordshire
Mastic sealing for Merton, from a contractor working since 2005. Fully insured and CHAS accredited.
- The same joint failures repeated across a portfolio
- Window mastic that has split and shrunk
- Worn sealant at communal door frames
Need mastic sealing in Merton?
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Cost factors for mastic joints
Quotes vary with the job. Expect it to depend on:
- The total length or number of joints
- Whether old sealant has to be cut out first
- Whether the work must be split into stages
- Location, for remote and island sites
We don’t publish prices, since every building and every scope is different. Call for a quote.
Details that help us quote
A few photographs plus some basic facts will normally do. It helps to include:
- The site address and postcode
- What the building is and how it’s used
- Whether an asbestos survey exists
- Rough lengths or quantities, or drawings if you have them
Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. To get it moving, give us a call on 01277 525 020 or email drawings and photos.
Mastic sealing in Merton
There isn’t one mastic for every joint on a building. Window perimeters and external joints often take a low-modulus neutral-cure silicone, while hybrid polymer sealants grip many materials and are often paintable, and colours are confirmed for whichever product is used. We work on shopfronts below residential blocks, external wall and movement joints and communal entrances and stairwells, and what we are called in for most is water getting in round frames after rain and the same joint failures repeated across a portfolio. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in Merton it comes down to the same thing: the right product in a properly prepared joint.
Around smaller places like Merton, older walls fitted with newer windows are a familiar sight. The mastic needs to suit an irregular masonry face and the look of the building.
Work we carry out in Oxfordshire comes with a 12-month guarantee. Should something we installed fail, phone 01277 525 020 or email a schedule or drawings and we’ll come back to it.
- Location
- Merton (OX25)
- Wider area
- Oxfordshire
- Guarantee
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Our process
Diagnose, treat, sign off: every visit follows that pattern. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and we finish with a walk round so the work can be signed off. Smaller jobs around Merton can be grouped with others nearby. A fixed quote is given before anything starts.
- First comes a look at the joints and, for older buildings, the asbestos records.
- A fixed quote covers the joints, products and order of work.
- Failed mastic is removed completely.
- The joints are prepared and resealed with the right product.
- We finish each building before moving to the next.
Getting the site ready
- Share your working hours and any access restrictions
- Tell staff and tenants when we’ll be in
- Point out parking and an unloading spot
Quotes
Photos, drawings or a schedule of the joints and a fixed quote comes back to you. If the job needs a look first, we will arrange a site visit.
Read more
After the work
Cleaning and maintenance staff play a part too. Pass these on to them:
- Avoid piecemeal callouts where you can
- Start inspections with the most exposed faces
- Check the asbestos register before any old mastic is disturbed
- Check sealant joints during planned building inspections
If a joint we sealed fails within 12 months, tell us and we’ll look at it. Beyond that, routine checks spot the next round of repairs.
One failed perimeter typically means others on the same building are close, so it pays to look at the whole elevation. Doing them together saves going back again and again.
Surface by surface
Planned maintenance
How long mastic lasts depends on exposure, movement and the product used. Inspecting joints regularly keeps programmes on track.
Estate-wide resealing programmes
Using the same products throughout keeps the estate consistent.
What we are called out for in Merton
Buildings move with temperature and moisture, and every joint has to stretch and squeeze with them. If the joint or the product wasn’t suited to the movement, it splits long before it should.
What tends to prompt an enquiry:
- Old repairs sealed over failed mastic
- Complaints coming in block by block
- Leaks at window and door perimeters
- Worn sealant at communal door frames
Older buildings near Merton, from historic houses such as Boarstall Tower, 3.7 miles south-east of Merton, to more modest stock, need compatible products when frames are resealed.
Comparing quotes
- How the existing material will be dealt with
- What level of public liability insurance do they hold?
- Can the work be phased to keep areas open?
- How joint depth will be controlled
Towns and villages near Merton
What else we do in Merton
What we can’t put right
Our job is the joint, not everything around it. Sealant alone won’t deal with:
- Water coming in from the roof or rainwater goods
- Cracked or crumbling render, brick or stone at the joint edges (we will tell you if so)
- Misted or failed double-glazed units
Not sure which it is? You can speak to us on 01277 525 020 or email a schedule or drawings and we’ll tell you honestly before you book.
Where we work in Merton
- Shopfronts below residential blocks
- Communal kitchens and washrooms
- External wall and movement joints
- Window and door perimeters on blocks
- Balcony and threshold joints
- Communal entrances and stairwells
Questions we are asked in Merton
Is Merton too small for you to travel to?
No. Places such as Merton are covered as much as the big towns. London and every South East county are within our area. Good photographs up front let us bring everything on the first visit.
Do you work for managing agents with blocks near Bicester Village station?
Yes, we work for agents, landlords and housing associations with blocks of every size. Give us the building’s details and say how residents are notified, and we’ll quote and plan to suit.
Who decides which product is used?
If the job is specified, we follow the specification. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.
How do you handle work on occupied blocks?
We plan around people living or working in the building. Dates and areas are agreed with you so residents or tenants can be told, and entrances stay in use.
Do you do block-wide mastic programmes?
Yes. We survey and price each building, then work through them in order starting wherever is most urgent.
How do you reach windows on upper floors?
We talk through access for each building when we quote. Tell us the building height and any access already in place and we will confirm the approach in the quote.
How long does a job like this take?
That varies with the scale of the job, but the work typically takes a day or two for a single block, longer for an estate programme. For bigger or phased jobs, we will set out a timescale with the quote.
Planned mastic for Merton portfolios
Merton is in the South East, one of the UK’s drier regions. External mastic still waits for dry faces and the right temperature, and the sunniest, most exposed sides of a building usually need attention first. Central London is about 52 miles from Merton. Within reach of London, blocks run by agents and associations are common around stations; their frame mastic often ages block-wide.
Property owners at sites such as Bicester Shopping Park (2.6 miles north of Merton) can have mastic renewed between lettings. Churches, halls and community buildings such as Church of St Swithin are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time.
Merton is about 3 miles south of Bicester, in Oxfordshire. We cover commercial sites throughout Merton. We work across 423 places in Oxfordshire, large and small. Oxford is covered too, around 8 miles from Merton.
Work on mastic joints is covered throughout OX25, whatever the building. If your building is just outside Merton, we cover Fencott (1 mile south), Murcott (1 mile south-east), Charlton-on-Otmoor (1 mile south-west), Wendlebury (2 miles north-west) and Lower Arncott (2 miles east). A short drive away, we cover Oxford (8 miles south), Bicester (3 miles north), Abingdon-on-Thames (13 miles south), Witney (15 miles west), Thame (11 miles south-east) and Kidlington (6 miles south-west).
Near you in Merton
We work on buildings around The Old Plough pub, among other places. The closest station to Merton is Bicester Village station, roughly 2.7 miles north of the centre. Well-known places in the area include Bicester Community Hospital (2.9 miles north) and Bicester Avenue (2.3 miles north). For a walk, there’s Graven Hill and Woodsides Meadow.