Facade Sealing contractors in Cosham
Facade joint and window perimeter sealing on commercial buildings in Cosham. CHAS accredited and fully insured, with a 12-month guarantee.
- Draughts around frames and panels
- Staining on stone next to old sealant
- Failed sealant on precast panel joints
Need facade sealing in Cosham?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
For managing agents and facilities managers
CHAS accredited and a Constructionline member, we’re straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.
Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.
Facade sealing for commercial buildings in Cosham
Every facade quote starts with how the joints will be reached. Tell us about access: whether scaffold is already up, what the client is arranging, and any restrictions on the site. Site teams most often ask us about old perimeter mastic that has dried out and staining on stone next to old sealant, on shopfront frames, perimeter joints where frames meet the structure and window and door perimeters. One point of contact handles commercial sealant work in Cosham from the first photos to the final walk-round, whether it’s one building or several.
On a small site around Cosham, the mastic is best done in the fewest visits we can manage. Let us know the key stages and we’ll time the work so nothing waits on us.
Our 12-month guarantee is about workmanship, not wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we spell out the cover before we begin.
- Where
- Cosham (PO6, PO3, PO2)
- Region
- Portsmouth
- Guarantee
- 12 months on our workmanship
- Price
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Places near Cosham
Also in Cosham
Facade sealing in Cosham: the local picture
Cosham lies within about 1 mile of the sea. Schemes this close to the sea see their facade joints tested by wind and rain from the day they’re sealed, and the sealant, primer and backing need choosing with that in mind. At about 62 miles from central London, Cosham is within reach of the capital. Commuter-belt towns tend to see a steady flow of new flats, offices and commercial schemes, which keeps mastic packages in demand.
Extensions at sites like Queen Alexandra Hospital, 0.6 miles north of Cosham, normally sit beside working departments, and the mastic follows strict access rules. New units and refits on sites such as Oak Park Industrial Estate (0.7 miles west of Cosham) need their panel and perimeter joints sealed to the specification. On a campus such as University of Portsmouth - Langstone Campus (3.4 miles south of Cosham), new teaching buildings and residences are usually built and refurbished around the academic year.
Cosham is about 2 miles south-west of Purbrook, in Portsmouth. We cover commercial sites throughout Cosham. Cosham is one of 19 places we cover in Portsmouth for facade joints.
Business premises anywhere in PO6, PO3 and PO2 are within our area. Buildings on Dean Road, Park Lane and Elgin Road are within our area for facade joints. With the A397 nearby, Cosham is straightforward for us to reach. Nearby places we also cover include Wymering (1 mile north-west), Hilsea (1 mile south), Drayton (1 mile east), Widley (1 mile north-east) and Paulsgrove (1 mile west). Further afield, our area takes in Southsea (4 miles south), Milton (3 miles south), Landport (3 miles south), Portsea (3 miles south-west), Portsmouth Point (4 miles south-west) and Fratton (3 miles south).
Near you in Cosham
Locally, jobs take us to sites close to The First Post pub, Alexandra Park and Springfield School, among other places. Cosham has its own railway station: Cosham station. A little further out are Tricorn Centre (2.9 miles south) and World War I Remembrance Centre (1 mile south-east). Open spaces near Cosham include Southmoor Nature Reserve and Portsdown Hill.
Maintenance after handover
A few simple habits keep the new joints working:
- Clear debris that holds water against joints
- Combine resealing with other works that need access
- Ask about asbestos in pre-2000 mastic
- Report water ingress at frames as soon as it shows
Let the new sealant cure before washing the facade or windows near it. Pressure washers and harsh cleaners can damage a fresh bead.
Planned resealing is cheaper than reacting to leaks. Regular checks let you renew joints before water gets in.
Questions we are asked in Cosham
Is Cosham off your patch?
No. Small places get the same service as large ones. We work across Greater London and the South East. Send photographs and a list of what needs doing, and we’ll plan the job to need as few trips as possible.
Does a coastal location like Cosham affect which sealant is used?
It can. Coastal exposure works external joints harder than inland weather. We choose the product for the exposure, prime where the manufacturer requires it and size the joint for its movement.
Will you come and look before quoting?
That depends on the size and complexity of the job. Simple work can often be priced from photos, and bigger or more complex jobs typically get a visit.
Do you install glazing systems?
No. We don’t install glazing systems, windows or glass. We seal the joints around them, such as perimeter joints where frames meet the structure.
How many days will you need on site?
That varies with the scale of the job, though a typical visit typically takes longer on a full elevation than on a handful of window perimeters, and it always depends on dry weather. Larger or phased jobs take longer, and we will give you a timescale with the quote.
Do you have public liability insurance?
Yes. We’re fully insured, including public liability cover.
Are you CHAS accredited?
Yes. We’re CHAS accredited and a Constructionline member.
Leave it or put it right?
Scaffold or access already on site makes resealing much simpler. Coordinating facade sealing with other external works avoids paying for access twice, saving a second set-up. In a smaller place such as Cosham, getting a contractor back for a second visit takes time, so we’d suggest renewing all the joints that are going, not just the worst.
The price depends on how many linear metres there are, what has to come out first and how the joints are reached. Call for a fixed quote when you are ready.
Why us?
- Clear, fixed quotes
- A range of standard colours, depending on the product
- Old sealant cut out, never sealed over
- Workmanship guaranteed for 12 months
Read what affects the cost and how we’re accredited.
How a job runs
Inspect, seal, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then we prepare and seal each joint with the specified product, and we finish with a walk round so the work can be signed off. If neighbouring businesses or buildings around Cosham need work too, visits can be combined. Mention the building’s opening times and we will work within them.
- Photos, drawings or a visit tell us about the joints and the access.
- We confirm the joint type, movement and the specified product.
- The existing bead comes out in full and the joint faces cleaned.
- Primer goes on where the product data asks for it.
- Rod goes in to fix the depth, then the joint is sealed and tooled.
- The finished joints are checked with you.
Preparing the site
- Let building users know which areas are affected
- Point out any areas we must not close
- Send any specification or drawings in advance
Ask for a quote
Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, speak to us on 01277 525 020 or send photos by email.
Related advice
How the job changes by surface
Precast concrete panels
Joints between precast panels carry real movement. A sealant of the right movement class goes in over backing rod, primed where the maker specifies.
Coping and flashing joints
Not every coping or flashing leak is a sealant problem. We tell you if the fix is a roofing or metalwork job rather than a reseal.
What sealant work can’t fix
A few problems need another trade or a different fix, and we point that out rather than sealing over them:
- Leaks from roofs, gutters or failed flashings rather than sealant joints
- Movement beyond what any sealant can handle
- Installing or repairing glazing systems
Not sure which it is? You can phone 01277 525 020 or use the quote form and we will tell you honestly.
Where we work in Cosham
- Coping and flashing joints
- Shopfront frames
- Perimeter joints where frames meet the structure
- Stone and brick facade joints
- Window and door perimeters
- Cladding panel joints