Facade and window perimeter sealing in Knowle, Hampshire
Commercial sealant work in Knowle for contractors, FMs and building owners: facade joint and window perimeter sealing on commercial buildings, quoted at a fixed price.
- New sealant peeling off old mastic
- Cladding panel joints that have opened up
- Weathered joints at frame-to-structure perimeters
Need facade sealing in Knowle?
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
About our facade sealing in Knowle
Facade sealants sit in the sun, rain and frost every day, so they don’t last indefinitely. Life depends on movement, weathering, product choice and the quality of the original work. When it fails, the whole bead is cut away and the joint rebuilt. Site teams most often ask us about hard, chalky sealant that no longer flexes and facade joints cracked through the middle, across stone and brick facade joints, shopfront frames and window and door perimeters. A single leaking joint is often how a building in Knowle first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.
For a site near Knowle, the mastic visit is planned so the right sealants, primers and backing rod are on hand. Drawings, photographs and the programme let us give a fixed quote.
Every job ends the same way: guaranteed. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.
- Where
- Knowle (PO17)
- Wider area
- Hampshire
- Cover
- 12 months on our workmanship
- Price
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
Building owners, agents and FMs in Knowle
Hospitality, education, healthcare, office and retail clients book us directly too. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.
We take on planned maintenance as well as one-off repairs: working through a building or an estate in stages that fit your budget. Knowle can form part of a wider programme across Hampshire.
What sets the cost
Each job is priced on its own details. The things that drive the figure:
- Backing rod, priming and other preparation
- The total length or number of joints
- Specialist products, such as fire-rated or hygienic sealants
- How much existing material needs removing
We don’t publish prices, because the scope varies so much from one building to the next. Call for a quote and we’ll price your job on its own details.
Details that help us quote
It doesn’t need to be a full survey. These details are enough to start:
- When you need the work done
- Any specification or named product
- Approximate linear metres or a joint schedule
- The asbestos register, for older buildings
Let us know the site, the scope and your timescale, and a fixed quote will follow. To get it moving, call 01277 525 020 or send details through our quote form.
Different surfaces, different methods
Render and coated surfaces
Where the joint will be painted over, a paintable hybrid or PU sealant may suit. We confirm the product with you before starting.
Coping and flashing joints
Not every coping or flashing leak is a sealant problem. Where the issue isn’t the sealant, we say so.
Facade sealing in Knowle: the local picture
Central London is about 64 miles from Knowle. Towns within reach of London tend to keep building, from flats to offices and schools, and main contractors there need mastic that keeps to the programme. Knowle has several hotels close by, all within 2 miles. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up.
When a college such as Fareham College (2 miles south of Knowle) builds or refurbishes, the mastic package usually has to fit around students and staff. Work at a hotel such as The King's Head Hotel (1.5 miles north-east of Knowle) tends to be programmed around bookings, mastic included.
Knowle is about 2 miles north of Fareham, in Hampshire. Our applicators travel to Knowle for work on facade joints, handled exactly as we handle every other area. Our Hampshire coverage takes in 723 places, large and small. There’s a separate page for Portsmouth, about 7 miles away.
Postcode districts covered here: PO17 for facade joints. We cover commercial and managed buildings on Serotine Close, Boundary Walk and Park Approach. We also cover Funtley (1 mile south), Tapnage (1 mile north-west), Heathfield (2 miles south), Segensworth (2 miles west) and Titchfield Park (2 miles south-west) for facade joints. Nearby towns on our patch include Winchester (13 miles north), Gosport (6 miles south-east), Havant (10 miles east), Eastleigh (9 miles north-west), Horndean (9 miles east) and Totton (13 miles west).
Around Knowle
Around Knowle, our work takes us to commercial buildings near The Miners Arms and The Henry Cort Community College. The closest station to Knowle is Fareham station, about 2 miles south. Well-known places in the area include Portchester Castle (4.9 miles south-east) and Knowle Hospital (less than half a mile north-east). The countryside around Knowle includes Portsdown Hill and Swanwick Lakes.
Towns and villages near Knowle
Other services in Knowle
When to call us in Knowle
When sealant lets go of a frame or panel, the cause is often the preparation. Dust, old sealant residue, damp or a missing primer stop it bonding properly, and movement soon pulls it away.
Site and facilities staff are often the first to spot these:
- Old perimeter mastic that has dried out
- Air leaks through failed facade joints
- Sealant pulling away from frames or panels
- Water coming in around window frames
New units and refits on sites such as Knowle Village Business Park (under half a mile north-west of Knowle) need their panel and perimeter joints sealed to the specification.
What to look for in a quote
- How joint depth will be controlled
- Whether primer will be used where the manufacturer specifies it
- Health and safety accreditation such as CHAS
- Their public liability cover
Our process
Inspect, seal, sign off: that’s the shape of every visit. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and the job ends with a walk round and sign-off. For a building around Knowle, tell us how to find it and who will meet us. Add it to your enquiry and we’ll build it into the plan.
- We start with photographs, drawings or a visit to see the joints and agree access.
- We confirm the joint type, movement and the specified product.
- The existing bead comes out in full.
- Primer goes on where the product data asks for it.
- Backing rod is fitted and the new sealant gunned in and tooled.
- The finished joints are checked with you.
Before we start on site
- Confirm the product named in the specification
- Point out parking and an unloading spot
- Tell us which areas need to stay in use
Getting a fixed quote
Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we’ll return a fixed quote you can plan around. For a chat about it beforehand, speak to us on 01277 525 020 or email drawings and photos.
Read more
Leave it or put it right?
Open facade joints also let air and dirt through: draughts around frames add to heating costs and complaints. Resealing deals with the draught as well as the leak. For buildings around smaller places like Knowle, water damage can go unnoticed for longer, especially where a building isn’t used daily, so a failed joint can leak for a while before anyone sees it. Renewing joints in good time avoids the problem.
The price depends on the quantity of joints, how much old material needs removing and how the joints are reached. Call for a fixed quote when you are ready.
What you get with us
- One number for every site we cover
- A range of standard colours, depending on the product
- Public liability insurance in place
- Constructionline member
See what affects the cost and our accreditations and insurance.
Common questions from Knowle clients
Do you cover business parks and estates near Knowle, such as Knowle Village Business Park?
Yes. Estates, retail parks and business parks around Knowle, Knowle Village Business Park among them, are all within reach. To start, just give us a call on 01277 525 020 or send photos by email with the unit, the joints involved and your access times.
Is a smaller place like Knowle outside your area?
Not at all: smaller places are covered as well as towns. 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.
Do you replace failed glazing units?
No. A glazing contractor handles that. What we seal are the joints around frames and panels.
Can you work to our specification?
Yes. We follow the specification, along with the manufacturer’s installation guidance, and any queries are raised before we start.
Is the work guaranteed?
Yes, for 12 months. If a joint fails because of how we installed it, we come back and put it right.
Will you check whether the sealant is causing the leak?
Yes. We look at the perimeter sealant and tell you whether it has failed before quoting. If the water seems to come from a roof, sill or the glazing unit instead, we say so.
How much does the work cost?
There isn’t a price list, as every site differs. With photographs or drawings, we can give you a fixed quote.