Downside mastic sealing
Planning work on a mastic joint in Downside? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Complaints coming in block by block
- Old repairs sealed over failed mastic
- Movement joints with sealant missing
Need mastic sealing in Downside?
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Mastic sealing in Downside
Most buildings come with mastic joints nobody has looked at since handover and it slowly wears out: it sits round windows and doors, along external joints and through communal areas. When it hardens, splits or pulls away, water and draughts follow along with complaints. If you have damaged joints in communal entrances and corridors and brittle perimeter mastic across a building, we can help, on shopfronts below residential blocks, balcony and threshold joints and external wall and movement joints alike. Looking for mastic applicators who cover Downside? We have been sealing commercial buildings since 2005, with CSCS-carded applicators.
In and around smaller places like Downside, landlords and agents often look after small groups of housing association properties, converted farm buildings and community buildings. Mastic around frames and on external joints wears out in time, whatever the building.
The 12-month guarantee covers our workmanship: the preparation, the sealing and the tooling. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Where
- Downside (KT11)
- Region
- Surrey
- Guarantee
- A 12-month guarantee
- Price
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
How the quote is worked out
These are the things that shape the price:
- Specialist products, such as fire-rated or hygienic sealants
- Location, for remote and island sites
- Access and working height
- Working within restricted access windows
There’s no price list, because the scope varies so much from one building to the next. Call for a quote.
What to include in your enquiry
There’s no need for a formal survey. A few details are enough to get going:
- The product your specification calls for
- Whether an asbestos survey exists
- Your programme or deadline
- The site address and postcode
Specifications, drawings and tender packages are welcome with any enquiry, and we will price the work to it. Smaller jobs need nothing more than photos and a few notes.
Why act early in Downside
Piecemeal repairs over the years often leave mismatched sealant. Resealing a whole building gives a consistent finish and one 12-month guarantee. Older rural buildings around Downside move with the seasons, and rigid or tired sealant can’t keep up. A sealant with the right movement capability, correctly sized, lasts far better.
Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. Send the details and a fixed figure follows.
Why choose Mastic Doctor in Downside
- Work carried out by CSCS-carded applicators
- CHAS accredited contractor
- One number for every site we cover
- Colours chosen to suit frames, cladding or finishes where possible
Planned mastic for Downside portfolios
At about 19 miles from central London, Downside is within reach of the capital. Managed blocks of flats are a big part of commuter-belt property. The South East is one of the drier parts of the UK. Outside mastic still needs a dry joint and the right temperature, and elevations facing the sun and the prevailing weather are normally where frame mastic ages first.
If you’re responsible for a building such as St Michael's Chapel, frame and door mastic needs the same attention as any other property. If you look after a block within reach of Cobham & Stoke Dabernon station, which lies north-east of Downside, frame and balcony mastic can be renewed on one programme. For a school such as St Matthew's CofE Aided Infant School, perimeter mastic on windows and doors is a holiday job.
Downside is about 4 miles west of Leatherhead, in Surrey. Our applicators travel to Downside for work on mastic joints, handled exactly as we handle every other area. Across Surrey, 379 places are covered, Downside among them. Sites around London have their own page, about 19 miles away.
Commercial sites across KT11 are covered for mastic joints. Streets here include Downside Common, Downsview Close and Deacon Close, and sites on any of them can send details for a fixed quote. Nearby places we also cover include Hatchford (1 mile west), Martyr's Green (1 mile south-west), Hatchford End (2 miles west), Whiteley Village (3 miles north) and Wisley (3 miles west) for mastic joints. Bigger towns within reach include Guildford (8 miles south-west), Woking (7 miles west), Camberley (14 miles west), Epsom (6 miles east), Horley (14 miles south-east) and Redhill (12 miles south-east).
Around Downside
Locally, jobs take us to sites close to The Plough Public House and Parkside School, among other places. The nearest railway station is Cobham & Stoke Dabernon station, roughly 1 mile north-east of the centre. Other landmarks nearby include Epsom Cottage Hospital (5.1 miles north-east) and Send and Ripley History Society Museum (3.8 miles west). Not far away are Jubilee Wood and Boldermere Lake.
On site: what to expect
We schedule the visit to fit the site hours and access windows you give us. On the day, the work area is kept contained and tidy, and we check in with your contact before moving on to each new area. For a building around Downside, tell us how to find it and who will meet us. Send that with the details and we will confirm the plan with the quote.
- We check the asbestos register for older buildings and look at the joints.
- The products and programme are set out in a fixed quote.
- We strip out the old sealant.
- Joint faces are cleaned, backed and resealed.
- We finish each building before moving to the next.
Before we start on site
- Share your working hours and any access restrictions
- Agree which areas must stay open
- Send asbestos survey details if the building is pre-2000
Getting a fixed quote
The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or give us a call on 01277 525 020 or send photos by email to discuss it first.
Read more
When to bring in a specialist
Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we’ll confirm the paperwork you need with the quote.
Commercial clients in Downside
Main contractors use us as their sealant subcontractor on new-build and refurbishment projects. Programme, specification and site rules come first, with CSCS-carded applicators on site.
Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
Aftercare for building managers
Keep the joints in good shape with a few simple steps:
- Check the asbestos register before any old mastic is disturbed
- Log resealing dates block by block
- Encourage occupiers to report problems at frames
- Start inspections with the most exposed faces
If paintable sealant was used, decoration can follow once it has cured. Silicone normally can’t be painted, so keep decorators off it unless told otherwise.
The longer failed joints are left, the more likely the substrate edges break up. Then the edges may need repairing first and the job grows.
Towns and villages near Downside
Other services in Downside
Questions we’re asked in Downside
Can you work at a site such as Bookham Industrial Estate, by Downside?
Yes. Our area takes in Downside and its surroundings, with estates and business parks such as Bookham Industrial Estate included. Send details of the unit and the work through our quote form for a quick quote.
Is a smaller place like Downside outside your area?
Not at all. Downside is within our area. Our area covers London and the South East counties. We plan jobs in smaller places so return trips are kept to a minimum.
Do you take on small jobs?
We quote for single jobs as well as large packages and programmes. Photos and a description are enough to start.
How do you choose the sealant?
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.
What guarantee do you give on resealing?
Every building we reseal has a 12-month guarantee. It applies to our workmanship rather than damage or problems with the frames.
Does weather matter for sealant work?
It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so we watch the forecast and rearrange outside work if we have to. Indoors, the weather is rarely a problem.
How many days will you need on site?
That varies with the scale of the job, though a typical visit normally takes a few days for most blocks, with larger programmes scheduled building by building. For bigger or phased jobs, we’ll set out a timescale with the quote.