Streatham mastic sealing
Looking for mastic sealing in Streatham? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- Damaged joints in communal entrances and corridors
- Complaints coming in block by block
- The same joint failures repeated across a portfolio
Mastic sealing near Streatham
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Commercial clients in Streatham
Hospitality, education, healthcare, office and retail clients come to us directly as well. The work is planned around how the building runs, so the building keeps working while we do.
FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
How we handle mastic sealing in Streatham
Mastic Doctor has sealed joints on commercial and residential blocks since 2005. Our applicators are CSCS-carded and we hold public liability insurance. Resealed mastic joints in Streatham carry our 12-month guarantee. If you are dealing with failed external movement joints and the same joint failures repeated across a portfolio, we can put it right, whatever the surface. One point of contact handles commercial sealant work in Streatham from the first photographs to the final walk-round, whether it’s one building or several.
Across Greater London, Streatham included, the ULEZ applies, and parking and loading rules differ from street to street. For a block or estate, it helps to know where we can park and stage materials.
We stand behind the joints we seal with a 12-month guarantee. It covers how we prepared and applied the sealant.
- Where
- Streatham (SW16, SW2, CR4, SW12)
- Wider area
- Greater London
- Cover
- 12 months on every job
- Quote
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
What sets the cost
Your fixed quote is built from the real scope. It allows for:
- Whether the work must be split into stages
- The product specified
- Location, for remote and island sites
- How much existing material needs removing
The price depends on the quantity of joints, how much old material needs removing and how the joints are reached. Call for a fixed quote once you have the details.
Sending details for a quote
Good information means a firmer quote. When you get in touch, include:
- What the building is and how it’s used
- Approximate linear metres or a joint schedule
- How the joints are reached, and at what height
- A wide shot and a close-up of the area
Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. To get it moving, phone 01277 525 020 or email us.
What the job involves on each surface
Commercial and mixed-use buildings
Commercial occupiers usually stay open during the work, so we plan around them.
External movement joints
The joint width has to suit the movement and the sealant’s capability with the width-to-depth ratio set as the manufacturer advises.
Looking after buildings in and around Streatham
Six care or nursing homes sit less than 2 miles from Streatham. For owners and operators of care buildings, window perimeters and external joints are best renewed in planned phases around residents. For a London block, the agent or landlord typically handles notices to residents and access to flats. We work to your notice and access plan.
If you look after a block within reach of Streatham station, less than half a mile south-west of Streatham, frame and balcony mastic can be renewed on one programme. If your remit includes a building such as St Andrew's Catholic Primary School, frame and door mastic can be programmed for the holidays. If you own or manage units on a site such as Zennor Road Industrial Estate, 1.3 miles north-west of Streatham, failed mastic on frames, door surrounds and external joints can be dealt with unit by unit.
Streatham is about 5 miles south of London, in Greater London. Anywhere in SW16, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. We work across 764 places in Greater London.
Work on mastic joints is covered throughout SW16, SW2, CR4 and SW12. Buildings on Stanthorpe Road, Gleneagle Mews and Madeira Road are within our area for mastic joints. You’ll find Streatham on or near the A205 and A216. Close to Streatham, our area also takes in Streatham Park (1 mile west), Furzedown (1 mile west), Streatham Hill (1 mile north), Hyde farm estate (1 mile north) and Grange Mills (1 mile north-west). Nearby towns on our patch include London (5 miles north), City of Westminster (6 miles north), Marylebone (6 miles north), Kensington (6 miles north-west), St Pancras (7 miles north) and Shoreditch (7 miles north).
Local landmarks in Streatham
Locally, jobs take us to sites close to Bishop Thomas Grant Catholic Secondary School, Streatham Common and Waldorf School of South West London and the streets around them. Streatham has its own railway station: Streatham station. Other landmarks nearby include Clockworks Museum (1.1 miles east) and Southside Wandsworth (3.3 miles north-west). Not far away are Knight's Hill and Battersea Park Lake.
Why deal with it now?
Looking at mastic during planned maintenance costs little. Leaving it until there’s a leak turns it into reactive work and less choice about when. Failed sealant in a building in Streatham can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Putting it right early is less disruptive than dealing with the consequences.
Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you will have a fixed figure to work with.
Why appoint us
- Fixed quotes based on photographs, drawings or a visit
- Constructionline member
- Matching to RAL references, product permitting
- CHAS accredited contractor
Read our cost guide and our accreditations.
Also near Streatham
Other services in Streatham
Questions about Streatham
Does your area include sites such as Zennor Road Industrial Estate, near Streatham?
Yes. Estates, retail parks and business parks around Streatham, Zennor Road Industrial Estate among them, are all within reach. A few photos and the unit address let us price the work.
Can you quote for a block close to Streatham station?
Yes, and several blocks can go on one quote. Send the address, photographs of the elevations and your access arrangements, and we will give a fixed quote.
Can you take on resealing for a block portfolio?
Yes. Managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios are our main clients for this work, and we quote building by building or as a programme.
How do you reach windows on upper floors?
We talk through access for each building when we quote. Tell us the number of storeys and whether scaffold or other access is planned and we will confirm the approach in the quote.
Do you cover Streatham?
Yes. We take on work across Streatham, and the same phone number covers every area.
Can weather delay the job?
It can, for external work. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so we watch the forecast and rearrange outside work if we have to. Internal work is far less affected.
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 communal access is kept open.
On site: what to expect
When we get to site, we report to your site contact and complete whatever induction the building runs. Everything around the joints gets protected before anything is cut or cleaned, with the work itself usually taking anything from a day to a few weeks, depending on the number of buildings and joints. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. Let us know about any on-site parking or loading arrangements when you send the job details.
- A building-by-building inspection lists the failed joints.
- The quote is fixed and split as suits you.
- We agree the programme and dates with you.
- Old mastic is removed and the joint faces prepared.
- New sealant goes in with backing rod and primer where needed.
- We check the finished work and confirm the guarantee.
Preparing the site
- Have the specification and drawings to hand
- Send your site hours and access windows
- Agree which areas must stay open
Request a quote
Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To ask for one, give us a call on 01277 525 020 or use the quote form.
Advice
What sealant work can’t fix
We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:
- Cracked or crumbling render, brick or stone at the joint edges (we’ll tell you if so)
- Glazing that needs replacing
- Frames that are rotten, warped or broken
Not sure which it is? You can call 01277 525 020 or email drawings and photos and we will tell you honestly before you book.
What we seal
- Shopfronts below residential blocks
- Balcony and threshold joints
- Communal entrances and stairwells
- External wall and movement joints
- Communal kitchens and washrooms
- Window and door perimeters on blocks