Greater London · England
Commercial sealant contractors in N5
Commercial sealant, construction mastic and joint sealing across N5, covering Highbury, Lower Holloway and Newington Green, with a fixed quote before we start.
Mastic and sealant across N5
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Places in N5
What we do in N5
- Facade and window perimeter sealing
- Fire-rated sealing and fire stopping
- Commercial sealant contractors
- Construction and new-build mastic
- Commercial washroom and wet-area sealing
- Mastic sealing for building owners and managing agents
- Industrial and floor joint sealing
- Expansion and movement joint sealing
- Coloured and colour-matched sealant
- All services
Tell us what needs doing and your postcode for a fixed quote: call the office on 01277 525 020 or email a schedule or drawings.
How commercial sealant contractors works in N5
Commercial occupiers rarely want a floor out of action for sealant work. Tell us your site hours and access windows and we’ll plan around them; phasing keeps some washrooms, kitchens or entrances available while others are done. It’s the same approach in offices, retail units, hotels, schools and healthcare buildings. Most enquiries involve window and door perimeter joints that have cracked open and shrunken sealant along kitchen worktops and splashbacks, across external facade joints, window and door perimeters and washrooms and tea points.
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Any old material is cut back to clean, sound faces, primer goes on where the manufacturer specifies it, and each bead is tooled to a neat concave finish.
- We start with the evidence: photographs, drawings or a look on site.
- You get a fixed quote covering removal, preparation and the new sealant.
- Sequence, access and working times are settled before the first joint is touched.
- Each joint is stripped, cleaned back to sound faces and primed where the maker specifies.
- Backing goes in, the new sealant is laid and tooled, and the area is left neat.
- We hand back each area with its cure time and our 12-month guarantee.
How we quote
There’s no price list, because the scope varies so much from one building to the next. For a fixed figure, call for a quote and we will price your job on its own details.
What you get with us
- A Constructionline member, so easy to vet
- Colour options checked against the specified product
- CSCS-carded applicators
- Sealing commercial buildings since 2005
Request a quote
Send us photographs, drawings or a joint schedule are often enough for a fixed quote. If the job needs a look first, we will arrange a site visit.
Near you in Highbury
In Highbury, that means premises near Christ Church, Highbury Fields and City of London Academy Highbury Grove and the streets around them. Other local landmarks include Musical Theatre Academy (0.5 miles south-west), The Snooty Fox pub (under half a mile south-east) and Highbury Quadrant Primary School (under half a mile north-east). Highbury has its own railway station: Canonbury station. Nearby you will also find Arsenal Football Club Museum (0.6 miles north-west) and Montfichet's Tower (2.7 miles south). Not far away are Gillespie Park and Dartmouth Park Hill.
Shops, offices and hotels in N5
From Highbury, Lower Holloway and Newington Green outwards, N5 has a broad spread of commercial premises: shops, offices, hotels, restaurants and units. We cover the whole area, so occupiers with several sites can use one contractor and one point of contact.
The South East has large numbers of business parks and industrial estates, especially around the motorway corridors, and N5 is part of the area we cover.
Highbury: Trade counters and showrooms on estates such as Frogmore Industrial Estate (to the north of Highbury) need neat joints where customers see them. Sites a few miles apart, such as Frogmore Industrial Estate and Roman Way Industrial Estate, can share one programme and one point of contact.
Maintenance after handover
Cleaning and maintenance staff play a part too. Share these points with them:
- Don’t let cleaning or traffic back on before the cure time is up
- Deal with small splits before they become leaks
- Ask fit-out and M&E contractors to report any sealant they disturb
- On pre-2000 buildings, share the asbestos information before work starts
Brief your cleaning team on the joints that have been resealed. Abrasive pads, scrapers and some strong chemicals damage sealant surfaces; a mild cleaner is all most joints need.
Each spell of wet weather pushes more water through an open joint. It can run into cavities, insulation and internal finishes long before anyone sees a stain. Resealing early keeps the problem in the sealant and out of the building.
Why act early?
A cheaper quote sometimes means the old bead stays in. New sealant laid on old silicone has nothing to bond to, so it peels. Our prices always include removal of the failed bead and full joint preparation.
Questions to ask before you book
- Their approach to joint depth and backing
- Is the sealant right for the movement and the substrate?
- Their pre-qualification and accreditations
- Their public liability cover
When something else is needed
We check first that sealant really is the fix. It won’t put right:
- Faulty windows rather than failed perimeter sealant
- Structural cracks or movement the joints weren’t designed for
- Old mastic that tests positive for asbestos
Common problems we fix in N5
Resealing over the top is a false economy we come across often. New silicone has nothing to key into, so the top layer lifts, holds water and hides what’s going on. By the time it shows, there can be two or three layers to cut out.
If one of these sounds familiar, it’s time for a closer look:
- Hardened, chalky sealant on south-facing or exposed elevations
- Frame mastic that has hardened and come away from the wall
- Sanitary sealant that has gone black and patchy
- Water staining near frames, panels or ceilings
Cost factors for sealant joints
Each job is priced on its own details. The main factors are:
- The total length or number of joints
- Joint width, depth and condition
- Location, for remote and island sites
- Whether old sealant has to be cut out first
Pricing sealant joints depends on how many there are, their condition and the access, and any specification that applies. Call for a quote.
Details that help us quote
Whether it’s one area or a whole building, these details speed things up:
- Whether the building will be occupied during the work
- Rough lengths or quantities, or drawings if you have them
- When you need the work done
- The postcode of the building
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, give us a call on 01277 525 020 or email the details over.
FAQs: N5
Do you seal on top of existing sealant?
No. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.
Are you CHAS accredited and on Constructionline?
Yes. We are CHAS accredited and a Constructionline member, which helps with supplier vetting.
Will the building have to shut during the work?
It’s normal for us to work in occupied buildings. Only the area being sealed is closed, and the sequence is agreed in advance for as long as the cure needs.
Do you cover N5?
Yes. We cover N5, and the simplest way to start is to call 01277 525 020 or email a schedule or drawings.
How long do sealant joints last?
Nobody can honestly give a figure in years, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular checks let you plan resealing before leaks or damage.
How is commercial sealant work priced?
Send photographs, drawings or a list of locations through our quote form. If a visit is needed we’ll book one, and a fixed quote follows.
Can you supply RAMS and insurance details?
We confirm documents at quote stage: RAMS, an insurance certificate and CSCS details are the usual requests. Every applicator holds a CSCS card.