Portsmouth · England
Commercial sealant contractors in PO1
Commercial sealant, construction mastic and joint sealing across PO1, covering Landport, Portsea and Portsmouth Point, with a fixed quote before we start.
Mastic and sealant across PO1
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Where we work in PO1
Sealant work we offer in PO1
- Construction and new-build mastic
- Commercial sealant contractors
- Fire-rated sealing and fire stopping
- Facade and window perimeter sealing
- Commercial washroom and wet-area sealing
- Expansion and movement joint sealing
- Mastic sealing for building owners and managing agents
- Coloured and colour-matched sealant
- Industrial and floor joint sealing
- All services
Tell us what needs doing and your postcode for a fixed quote: speak to us on 01277 525 020 or email a schedule or drawings.
Neighbouring districts
Elsewhere in Portsmouth
All places in Portsmouth
Every area we cover
Commercial sealant contractors across PO1: what to expect
Most commercial buildings carry hundreds of metres of sealant that nobody thinks about until it fails. Mastic Doctor works as a commercial sealant contractor for facilities managers, managing agents and main contractors with sites in PO1. We find out why the sealant joints failed, take them out and seal again using a sealant that suits the joint. We work on washrooms and tea points, movement joints in walls and floors and kitchen worktops and splashbacks, and the usual reasons a site gets in touch are messy, uneven beads from earlier work that let the building down and greasy, split joints in a kitchen or tea point.
A typical day starts with protection: masking tape along the joint edges and sheeting over anything nearby. On site, the work usually takes anything from part of a day on a short run of joints to several weeks on a large phased package, and our waste is bagged and taken away as we go.
- First, details reach us through the quote form or a site visit.
- The cause is diagnosed and the scope priced as a fixed quote.
- Where parts of the building must stay open, the work is phased.
- Every failed bead is removed rather than covered.
- A suitable product for each joint goes in at the right depth and is tooled.
- A final walk-round, then the 12-month guarantee applies.
How we quote
Larger quantities, tricky access or phasing all shape the price. So do site requirements such as inductions and permits.
Why clients in PO1 choose us
- Public liability insurance in place
- 12 months’ guarantee on every job
- Constructionline member for supplier checks
- One contact handling all your sites
Request a quote
The quickest route to a quote is a few photographs and the site postcode. Send them through the quote form, or phone 01277 525 020 or use the quote form if you’d rather talk the job through.
What’s near Landport
We work on buildings around Alexandra Park, St Edmund's Catholic School and The Painters Arms and the streets around them. Nearby too are Church of All Saints (under half a mile north), St Edmund's Catholic School (less than half a mile south) and Ark Dickens Primary Academy (under half a mile north-east). Landport has its own railway station: Portsmouth & Southsea station. Well-known places in the area include Royal Portsmouth Hospital (less than half a mile south-west) and Charles Dickens Birthplace Museum (less than half a mile north). Open spaces near Landport include Milton Locks and Portsdown Hill.
Commercial sealant contractors across PO1: the area picture
Commercial buildings across PO1 range from older premises altered many times to recent units on business parks. Surfaces decide the sealant, from masonry to powder-coated frames and shop-fit panels.
The South East is one of the UK’s drier regions, though outside work in PO1 still waits for dry faces, and cold mornings bring frost and condensation on steel and glass. Parts of PO1 lie on or near the coast, where wind-driven rain and, closer to the shore, salt air are harder on external joints. We take that exposure into account when choosing the product.
Landport: A hotel such as Hampshire Court Hotel (0.8 miles south-west of Landport) shows how much sealant a hospitality building has on show, from bathroom joints to the bar. Retail sites such as Victory Retail Park, less than half a mile to the north of Landport, are typical of where shop-fit joints, frontages and staff areas need neat, colour-matched sealant.
After the work
After handover, these steps help:
- Keep abrasive pads and scrapers off resealed joints
- Keep barriers up until the new sealant has cured
- Keep washroom and kitchen extraction working
- Log reseals in the O&M or maintenance records
We stand behind the workmanship with a 12-month guarantee. File the handover note with the building records so it’s easy to find if a joint we sealed gives trouble inside the 12 months.
Tenants and staff spot black or split sealant quickly. Replacing it on a planned cycle keeps complaints down.
Why act early?
Fixing joints complaint by complaint is a costly way to manage sealant. A planned programme groups work by building or area, cuts repeat visits and gives you a budget figure. We can help you prioritise, starting with the joints most likely to let water in.
Questions to ask before you book
- Are they CHAS accredited or on Constructionline?
- Is the sealant right for the movement and the substrate?
- How the existing material will be dealt with
- How they’ll work around occupants
Honest limits
Sealant solves a lot, but not everything, and we are upfront when that’s the case. It won’t fix:
- Water from a services leak rather than a joint
- Roof leaks that only look like a joint problem
- Cracking that needs a structural engineer to look at it
Quoting for work in PO1
A fixed quote reflects the actual work. It allows for:
- Whether the work must be split into stages
- The site’s rules and procedures
- How much existing material needs removing
- The total length or number of joints
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’ll price your job on its own details.
What to include in your enquiry
Whether it’s one area or a whole building, these details speed things up:
- Clear photographs of the problem areas
- Whether an asbestos survey exists
- Access details, including height
- The postcode of the building
Send us photographs, drawings or a joint schedule and a fixed quote comes back to you. Where a site visit makes more sense, we’ll arrange one.
Common problems we fix in PO1
When a bead peels cleanly off one face, it has failed in adhesion. The usual causes are poor preparation, a missed primer, contamination on the joint face or sealant bonded to the base of the joint. We see it often where joints were sealed in a hurry.
Site and facilities staff are often the first to spot these:
- Water staining near frames, panels or ceilings
- A top-up bead over failed sealant, now lifting
- Messy, uneven beads from earlier work that let the building down
- Expansion joints with the sealant torn out
FAQs: PO1
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 one contractor look after sealant on all our buildings?
Yes. Send a list of addresses and what’s needed at each, and fixed prices follow, with a suggested sequence.
Do you work directly for building managers?
Yes, and through main contractors too. You send the details, we return a fixed quote, and the job is done and signed off.
Do you seal on top of existing 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.
How long does a typical visit take?
That varies with the scale of the job, though a typical visit normally takes part of a day on a small job and longer where several buildings or phases are involved. For bigger or phased jobs, we’ll set out a timescale with the quote.
Do you hold CHAS accreditation?
Yes. We are CHAS accredited and a Constructionline member.
Can you work to our specification?
Yes. The specification and the manufacturer’s installation guidance are what we work to, and any queries are raised before we start.