Nunhead mastic sealing
Need mastic sealing in Nunhead? It’s simple: send details, get a quote, we seal, guaranteed.
- A mix of products and colours from past repairs
- Leaks at window and door perimeters
- Complaints coming in block by block
Mastic sealing for Nunhead sites
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Signs you need mastic sealing in Nunhead
UV and rain age external sealant. The surface chalks, the body stiffens and cracks appear most of all on the sunniest and most exposed elevations.
If one of these sounds familiar, it’s time for a closer look:
- Draughts at frames across a block
- Patchy repairs in mismatched sealant
- Brittle perimeter mastic across a building
- No planned programme for sealant
Schools and community buildings such as Ivydale Primary School need frame and external mastic kept sound like any building.
Comparing quotes
- Whether primer will be used where the manufacturer specifies it
- Which product they’ll use, and why it suits the joint
- Can the work be phased to keep areas open?
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
Mastic sealing for commercial buildings in Nunhead
On a residential block, the work happens around people’s lives. The sequence, the areas and the dates are settled with you so you can let residents know what is happening. Entrances and stairwells are kept in use while we work. If you have brittle perimeter mastic across a building and occupiers reporting cold air round windows, we can help, on balcony and threshold joints, communal entrances and stairwells and shopfronts below residential blocks alike. Whether you call it commercial sealant work, mastic application or joint sealing, in Nunhead it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.
Planning mastic work on a London block means notices to residents, access to flats and agreed working areas. We work to the agent’s notice and access plan, so residents know what’s happening.
Every job ends the same way: guaranteed. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.
- Place
- Nunhead (SE15, SE4, SE14)
- Region
- Greater London
- Cover
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Towns and villages near Nunhead
Other services in Nunhead
From enquiry to sign-off
On arrival, 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, and the work usually takes one or more days per building, depending on the joint lengths and the access. For a job in Nunhead, access comes first. Send the building rules and access times with your enquiry.
- First we look at the mastic on each building and note what needs replacing.
- You get a fixed quote, priced per building where that helps your budgeting.
- The programme is fixed with you, including dates you can pass on to residents or tenants.
- We remove the old mastic completely and clean the joint faces back.
- Backing rod and primer go in as the joint requires, then the new bead is placed and tooled.
- Finished joints are looked over and the 12-month guarantee confirmed.
Getting the site ready
- Send asbestos survey details if the building is pre-2000
- Move anything stored against the joints
- Have the specification and drawings to hand
Get a fixed quote
Let us know the site, the scope and your timescale, and a fixed quote will follow. To get it moving, speak to us on 01277 525 020 or send details through our quote form.
Advice
How the quote is worked out
The price varies from site to site. Expect it to depend on:
- Quantities, in metres or numbers
- Backing rod, priming and other preparation
- Working within restricted access windows
- Distance, for remote addresses
Pricing mastic joints depends on quantities, condition and access, and any specification that applies. Call for a quote.
Details that help us quote
A few photographs plus some basic facts will normally do. Please tell us:
- The product your specification calls for
- Photos of the joints, close up and from further back
- Rough lengths or quantities, or drawings if you have them
- Whether the building will be occupied during the work
Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to phone 01277 525 020 or use the quote form with what you know.
Should maintenance staff do it?
For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.
Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong normally costs more in the end than doing them right.
What the job involves on each surface
Estate-wide resealing programmes
Consistent products and colours across an estate make future maintenance simpler and easier to manage.
Tenement and older buildings
Some old mastics in pre-2000 buildings contain asbestos, so we check the asbestos register or survey first. Suspect material is tested before work continues.
For owners and agents in Nunhead
Two care or nursing homes sit less than 2 miles from Nunhead. Owners of care premises can bring window and door mastic into a phased programme planned around the home. London blocks come with residents to inform, access to agree and often a concierge or estate office to work with. We work to your notice and access plan.
If you look after a block within reach of Nunhead station (less than half a mile north of Nunhead), frame and balcony mastic can be renewed on one programme. Owners of student blocks near King's College London (1.8 miles west of Nunhead) can schedule frame and external mastic for the summer vacation.
Nunhead is about 1 mile south-west of New Cross, in Greater London. Businesses, contractors and managing agents in Nunhead use us for work on mastic joints. 764 places across Greater London fall within our area, Nunhead among them.
We take on mastic joints across the SE15, SE4 and SE14 postcode area, for business premises of every kind. Among the streets we cover are Rye Road, Nash Road and Kitto Road, and sites on any of them can send details for a fixed quote. Just outside Nunhead, we also work in Telegraph Hill (1 mile north-east), Honor Oak (1 mile south), Peckham (1 mile north-west), New Cross (1 mile north-east) and Brockley (1 mile south-east). Further afield, our area takes in London (3 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles west), St Pancras (5 miles north-west) and Shoreditch (5 miles north).
Around Nunhead
Recent enquiries here include premises near The Ivy House, Peckham Rye and Allenby Tutorial Trust, among other places. Nunhead has its own railway station: Nunhead station. Well-known places in the area include Greenwich Castle (2.4 miles north-east) and Lewisham Shopping Centre (1.7 miles east). Green spaces nearby include Knight's Hill and One Tree Hill.
Common questions from Nunhead clients
Do you work in occupied care homes around Nunhead?
Yes, with the manager deciding the order and timing of rooms. Any site rules, from signing in to infection control, are agreed before we start.
Do you work for managing agents with blocks near Nunhead station?
Yes. Blocks of any size are within what we do. Photos of each elevation help us quote accurately.
Will you just go over the old sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.
Who decides which product is used?
A specification, where there is one, decides it. Without one, the joint decides: its movement, its surfaces and what it has to cope with.
Can you seal joints high up on a block?
Every block is different. How upper joints are reached is agreed before work is booked so there are no surprises.
What if the old mastic contains asbestos?
We don’t remove asbestos-containing materials. If old sealant is suspected, work stops until it’s tested in line with the dutyholder’s asbestos management.
Do you work for managing agents and housing associations?
Yes, block and estate work is a core part of what we do. Buildings are scheduled in turn with dates agreed in advance.
Building owners, agents and FMs in Nunhead
Main contractors use us as their sealant subcontractor. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.
CHAS accredited and a Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.