Facade Sealing contractors in Portchester
Facade joint and window perimeter sealing on commercial buildings in Portchester. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Water coming in around window frames
- Sealant pulling away from frames or panels
- Cladding panel joints that have opened up
Facade sealing across Portchester
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Facade sealing for commercial buildings in Portchester
External joints face UV, rain, temperature swings and building movement all year, and they wear out over time. How long a joint lasts depends on the movement it takes, its exposure, the product and how well it was installed. When it fails, the whole bead is cut away and the joint rebuilt. We work on perimeter joints where frames meet the structure, window and door perimeters and stone and brick facade joints, and the usual reasons a site gets in touch are water coming in around window frames and old perimeter mastic that has dried out. Whether you call it commercial sealant work, mastic application or joint sealing, in Portchester it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.
Around places like Portchester, a lot of construction is the conversion of older buildings, which leaves joints between old walls and new frames that need a sealant able to take the movement.
What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Where
- Portchester (PO16, PO6, PO17)
- Region
- Hampshire
- Guarantee
- 12 months on every job
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
Why it’s worth doing now in Portchester
Open facade joints also let air and dirt through: occupants notice draughts and cold spots around windows. A new seal closes the gap for both. In a smaller place such as Portchester, 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.
Access can matter as much as the joints themselves: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.
What you get with us
- Clear, fixed quotes
- Over 20 years of commercial sealing
- Old sealant cut out, never sealed over
- One contact handling all your sites
Take a look at our cost guide and our accreditations and insurance.
Honest limits
Our job is the joint, not everything around it. On its own, sealant can’t deal with:
- Render or concrete edges that have broken away
- Joints too narrow for the movement they take, which need redesign
- Arranging specialist high-level access, which is planned with the client
If you’re not sure, just speak to us on 01277 525 020 or email drawings and photos and we’ll give you a straight answer.
Joints and surfaces we work on
- Window and door perimeters
- Coping and flashing joints
- Shopfront frames
- Perimeter joints where frames meet the structure
- Cladding panel joints
- Stone and brick facade joints
Facade sealing around Portchester: points for this area
Portchester is within about 1 mile of the coast. Facades and window perimeters on coastal schemes take more wind-driven rain, and salt air nearer the shore, so we check the specified product suits the exposure before the first bead. There are a number of hotels within about 2 miles of Portchester. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up.
Building work at universities like University of Portsmouth - North Zone, 3.2 miles south of Portchester, is often timed for the summer, mastic included. For contractors at a college like St Vincent College, 2.8 miles to the south of Portchester, perimeters and internal sealant are timed for the holidays. When units on a site such as Castle Trading Estate, under half a mile to the north of Portchester, are refurbished or reclad, the panel joints and window perimeters are part of the mastic package.
Portchester is about 3 miles north-east of Gosport, in Hampshire. Across the PO16 postcode area, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. Our Hampshire coverage takes in 723 places, large and small.
Postcode districts covered here: PO16, PO6 and PO17. Among the streets we cover are Cow Lane, Hill Road and Ralph Road, and sites on any of them can send details for a fixed quote. Sites close to Portchester are covered too, including Boarhunt (2 miles north-west), Southwick (2 miles north), Elson (2 miles south-west), Wallington (2 miles west) and Priddy's Hard (2 miles south). Nearby towns on our patch include Gosport (3 miles south-west), Havant (6 miles east), Eastleigh (13 miles north-west), Fareham (3 miles west), Horndean (7 miles north-east) and Chandler's Ford (15 miles north-west).
What’s near Portchester
Around Portchester, our work takes us to commercial buildings near Portchester Community School and The Cormorant pub and the streets around them. The nearest railway station is Portchester station, about 0.5 miles north-west of the centre. A little further out are Portchester Castle (less than half a mile south-east) and Queen Alexandra Hospital (2.3 miles east). The countryside around Portchester includes West of the River Alver and Portsdown Hill.
How the job changes by surface
Precast concrete panels
Precast arrises sometimes crumble or carry old residue. Faces are cleaned to sound concrete, and damaged edges are reported before sealing.
Perimeter joints at frames and structure
Perimeter joints at frames often show their age first. We cut them out, prepare both faces and reseal to the specification using a sealant classified for that use.
How the quote is worked out
There’s no standard rate for sealant work, since sites vary so much. What we look at:
- The product specified
- The size and state of each joint
- Travel to remote or island sites
- Induction, permit and paperwork requirements
The product called for affects the cost, as does the preparation each joint needs. Access, phasing and site rules also count.
Sending details for a quote
However big the job, the same details help:
- The postcode of the building
- A wide shot and a close-up of the area
- Asbestos survey details if the building is older
- When you need the work done
Tell us about the building, the joints and when you need the work done, and we’ll put a fixed quote together. The easiest way is to give us a call on 01277 525 020 or email a schedule or drawings.
Common questions from Portchester clients
Could you schedule work at a campus like University of Portsmouth - North Zone for the vacation?
Yes. Tell us the term dates, vacation periods and access windows, and we will plan the work around them. Let us know which documents your site asks for, and we’ll confirm them alongside the quote.
Can you take on a job at a hospital such as Queen Alexandra Hospital?
Yes, hospitals are one of the sectors we cover. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Which sealant do you use on facades?
The product follows the joint’s movement, the surfaces and the specification. Specifications often refer to BS EN 15651-1 for facade sealants or BS EN 15651-2 for glazing.
Is Portchester in your area?
Yes. We cover Portchester. To discuss a job, phone 01277 525 020 or email us.
Is your workmanship covered by a guarantee?
Yes, for 12 months. If a joint fails because of how we installed it, we come back and put it right.
How long does a typical visit take?
That varies with the scale of the job, though a typical visit usually takes a day or two for a few elevations, and longer where access has to be moved around the building. Larger or phased jobs take longer, and we’ll give you a timescale with the quote.
How long do sealant joints last?
It depends on movement, UV and weather, cleaning, traffic and the product. Sealant joints are maintenance items, so inspect them regularly.
Building owners, agents and FMs in Portchester
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.
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.
Also near Portchester
Also in Portchester
Our process
The first thing on site is a walk round with your contact, agreeing which joints are in scope, where to start and what must stay open. Then we strip out anything that has failed, prepare every joint and seal it. For a site in Portchester, we plan so the whole job is done in one go where possible. Photos with rough sizes let us arrive with everything needed.
- Photos, drawings or a visit tell us about the joints and the access.
- Product choice follows the joint’s movement and substrate.
- The existing bead comes out in full and the joint faces cleaned.
- Primer is applied where the maker specifies it.
- Rod goes in to fix the depth, then the joint is sealed and tooled.
- The finished joints are checked with you.
Getting the site ready
- Point out any areas we must not close
- For older buildings, check the asbestos register before work
- Send any specification or drawings in advance
Ask for a quote
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. For smaller jobs, photos and a description will do.