Selhurst mastic sealing
Mastic sealing for building owners, managing agents and housing associations in Selhurst. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Estate-wide sealant that is simply worn out
- Failed external movement joints
- No planned programme for sealant
Mastic sealing for businesses in Selhurst
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
From enquiry to sign-off
Before any cutting starts, the area is protected: masking tape along the joint edges and sheeting over anything nearby. The work itself typically takes one or more days per building, depending on the joint lengths and the access, and we clear our waste as we work. Most London premises stay occupied while we’re on site, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.
- First we look at the mastic on each building and note what needs replacing.
- We send a fixed quote that sets out the joints, the products and the programme.
- The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
- We remove the old mastic completely and clean the joint faces back.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Finished joints are looked over and the 12-month guarantee confirmed.
Before we start on site
- Let us know about inductions and permits
- Let building users know which areas are affected
- Send any specification or drawings in advance
Request a quote
Pricing a project or setting a maintenance budget? We will quote against your scope and drawings you can plan around. For a chat about it beforehand, call 01277 525 020 or email a schedule or drawings.
Advice
Mastic sealing in Selhurst
For blocks and buildings in Selhurst and across Greater London, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Addresses, photos of typical joints and a rough idea of quantities let us give a quick quote, and site visits can be arranged. We work on external wall and movement joints, window and door perimeters on blocks and communal kitchens and washrooms, and what we are called in for most is water getting in round frames after rain and brittle perimeter mastic across a building. A specialist sealant contractor works differently from a general builder: on jobs in Selhurst, preparation and product choice get the time they need.
Across Greater London, Selhurst included, the ULEZ applies, and parking and loading rules differ from street to street. For block-wide work, a place to park and store materials saves time on every visit.
We sign every job off with a 12-month guarantee. It’s a plain promise: if our work fails within that year, we put it right.
- Place
- Selhurst (SE25, SE20, CR0)
- Region
- Greater London
- Cover
- 12 months on every job
- Quotes
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Honest limits
A proper diagnosis includes knowing what sealant can’t do. We’ll tell you if the real problem is any of the following:
- Asbestos-containing sealant, which we don’t remove
- Water coming in from the roof or rainwater goods
- Substrate edges that need repairing first
Not sure which it is? You can speak to us on 01277 525 020 or email us and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Shopfronts below residential blocks
- External wall and movement joints
- Balcony and threshold joints
- Communal kitchens and washrooms
- Window and door perimeters on blocks
- Communal entrances and stairwells
Nearby places to Selhurst
What else we do in Selhurst
Work for main contractors and building owners
If you look after buildings for someone else, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.
Building owners and managing agents use us on sealant work across single buildings or whole portfolios. One quote can cover more than one site, which keeps the paperwork simple.
What sets the cost
Sealant work doesn’t have a standard rate, since sites vary so much. What we take into account:
- Whether the work must be split into stages
- The product specified
- How accessible the joints are
- The site’s rules and procedures
Access can matter as much as the joints themselves: joints within easy reach take less time than ones that need access equipment. Tell us how the joints are reached and call for a quote.
Details that help us quote
To price the job accurately, we need a clear picture of the site. Useful things to include:
- When you need the work done
- How the joints are reached, and at what height
- The postcode of the building
- Drawings or a marked-up plan, if available
Send us photographs, drawings or a joint schedule and a fixed quote comes back to you. Where a site visit makes more sense, we’ll arrange one.
Site staff or a sealant specialist?
For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class, which is what makes a joint last.
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
Planned mastic for Selhurst portfolios
Selhurst has five care or nursing homes no more than 2 miles away. 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 normally handles notices to residents and access to flats. Our programme follows the access you agree with residents.
Blocks of flats and mixed-use buildings often cluster around stations such as Norwood Junction station (to the south of Selhurst) and their window and balcony mastic tends to age at the same rate across a building. If your remit includes a building such as St Mark's Church of England Primary Academy, frame and door mastic can be programmed for the holidays. Older community buildings, Church of St Mark among them, often have frames of mixed ages whose mastic varies.
Selhurst is about 5 miles south-east of Stockwell, in Greater London. Looking for mastic sealing in Selhurst? We can help, as we do across Greater London. Selhurst is one of 764 places in Greater London on our list. For work in that direction, see our London page (7 miles or so).
If you need mastic sealing in SE25, SE20 and CR0, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Buildings on Park Road, Court Road and Dixon Road are within our area for mastic joints. Selhurst sits on or close to the A213, which helps when planning parking and deliveries for the job. Close to Selhurst, our area also takes in South Norwood (1 mile north), Woodside (1 mile south), Ashburton (1 mile south), Elmers End (1 mile east) and Addiscombe (1 mile south). Bigger towns within reach include London (7 miles north), City of Westminster (9 miles north-west), Marylebone (9 miles north), Kensington (9 miles north-west), St Pancras (9 miles north) and Shoreditch (9 miles north).
Near you in Selhurst
Locally, jobs take us to sites close to Harris Academy South Norwood, South Norwood Recreation Ground and The Albion pub. There’s a railway station in Selhurst itself: Norwood Junction station. Nearby you’ll also find Croydon University Hospital (1.7 miles south-west) and Crystal Palace Museum (1.4 miles north). Open spaces near Selhurst include Duppas Hill and Dulwich Upper Wood.
What happens if it’s left?
Reacting to every complaint means sending someone out block by block. Planned resealing covers a whole building or estate in one go, under a single quote and a single programme. Failed sealant in a building in Selhurst can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
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 we’ll put a fixed figure on it.
Why us?
- CSCS-carded applicators
- A fixed quote before work starts
- A Constructionline member, so easy to vet
- Standard and matched colours in many product ranges
Read what affects the cost and our accreditations.
Your questions answered
Do you cover business parks and estates near Selhurst, such as Chaffinch Business Park?
Yes. Our area takes in Selhurst and its surroundings, with estates and business parks such as Chaffinch Business Park included. To start, just phone 01277 525 020 or send photos by email with the unit, the joints involved and your access times.
Will you take on a block within reach of Norwood Junction station?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Give us the building’s details and say how residents are notified, and we’ll quote and plan to suit.
What paperwork can you provide?
Let us know your requirements: tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We are CHAS accredited and a Constructionline member.
How many days will you need on site?
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. Larger or phased jobs take longer, and we will give you a timescale with the quote.
When is resealing likely to be due?
It depends on movement, UV and weather, cleaning, traffic and the product. Sealant joints are maintenance items, so inspect them regularly.
Is it fine to apply new sealant on top of old?
No, never. Sealing over old material is one of the classic causes of early joint failure, so it all comes out first.
Which sealant will you use?
A specification, where there is one, decides it. Without one, the joint decides: its movement, its surfaces and what it has to cope with.