South East England and London
Mastic Sealing in Portsmouth
Mastic sealing in all 19 towns and villages of Portsmouth, done properly, quoted before any work starts and a 12-month guarantee.
Mastic Sealing in Portsmouth
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Where we work in Portsmouth
Mastic sealing for building owners, managing agents and housing associations. Pick your town below to see the details for your area, and send details for a fixed quote.
Larger towns
More services in Portsmouth
- Coloured and colour-matched sealant
- Commercial washroom and wet-area sealing
- Commercial sealant contractors
- Construction and new-build mastic
- Expansion and movement joint sealing
- Industrial and floor joint sealing
- Facade and window perimeter sealing
- Fire-rated sealing and fire stopping
Postcodes in Portsmouth
Mastic sealing in Portsmouth: how it works
Blocks are lived in, so access and disruption have to be thought through. The sequence, the areas and the dates are settled with you so you can let residents know what is happening. Communal entrances and stairs stay usable while we work. Most enquiries involve water getting in round frames after rain and mastic failing across several blocks on an estate, on window and door perimeters on blocks, communal kitchens and washrooms and communal entrances and stairwells.
The first thing on site is a walk round with your contact, to confirm the scope, the order of work and any areas we must keep clear. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in.
- We inspect each building and record the joints that have failed.
- You get a fixed quote, per block or for the whole programme.
- Dates and areas are agreed so occupiers can be told.
- Failed sealant is removed and the faces prepared.
- Joints are resealed and tooled.
- Each building is checked and signed off with the 12-month guarantee.
What affects the price in Portsmouth
The product called for affects the cost, as does the preparation each joint needs, such as cutting out, priming or new backing rod. Access, phasing and site requirements come into it too.
Why appoint us
- CHAS accredited
- Standard and matched colours in many product ranges
- Colours confirmed for the specified product
- Commercial sealant work since 2005
Get a fixed quote
Let us know the site, the scope and your timescale, and a fixed quote will follow. The easiest way is to speak to us on 01277 525 020 or send photos by email.
Landmarks near Portsmouth
Around Portsmouth, our work takes us to commercial buildings near Manor Infant School, Alexandra Park and St Wilfrid, among other places. Also close by are The Druids Arms (less than half a mile north-east), The Portsmouth Academy (less than half a mile south-east) and St Edmund's Catholic School (0.7 miles south-west). The nearest railway station is Fratton station, roughly 0.9 miles south. Well-known places in the area include Royal Portsmouth Hospital (0.7 miles south-west) and Charles Dickens Birthplace Museum (less than half a mile west). Open spaces near Portsmouth include Milton Locks and Portsdown Hill.
For owners and agents in Portsmouth
Portsmouth has managed buildings of every age, from older blocks to new developments. We inspect the whole building first, so you know which joints need doing now.
We work across Greater London and the South East counties, and every job in Portsmouth starts with access, parking and site rules. In the parts of Portsmouth near the sea, the elevations facing the weather are where sealant gives up first, so they’re worth inspecting more often.
Portsmouth: Site managers at schools like Manor Infant School can fit frame mastic into the summer works. Property owners at sites such as Victory Retail Park (to the west of Portsmouth) can have mastic renewed between lettings.
After the work
Problems stay small when the joints are checked regularly. In particular:
- Avoid piecemeal callouts where you can
- Check the asbestos register before any old mastic is disturbed
- Start inspections with the most exposed faces
- Log resealing dates block by block
Add mastic joints to your cyclical inspections. Check for splits, open joints, brittle mastic and lifting edges, and note the building and elevation.
Joints on a building age together, so it pays to look at the whole elevation. Doing them together saves going back again and again.
How the job changes by surface
Commercial and mixed-use buildings
Commercial buildings have mastic at shopfronts, entrances and external joints. A planned programme suits multi-building portfolios.
Tenement and older buildings
Older buildings, including Scotland’s sandstone tenements, have their own joint details. The material either side of the joint shapes the product choice.
What happens if it’s left?
Piecemeal repairs over the years often leave mismatched sealant. Resealing a whole building gives a consistent finish and one 12-month guarantee.
Questions to ask before you book
- How the existing material will be dealt with
- How the joint faces will be prepared and primed
- Is the sealant right for the movement and the substrate?
- Proof of insurance
Owners, agents and contractors
CHAS accredited and a Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.
Hospitality, education, healthcare, office and retail clients come to us directly as well. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.
What sets the cost
Sealant work doesn’t have a standard rate, since sites vary so much. What we look at:
- The total length or number of joints
- Whether old sealant has to be cut out first
- Any access equipment needed
- Site requirements such as inductions and permits
Larger quantities, tricky access or phasing all shape the price. So do site requirements such as inductions and permits.
Before you send an enquiry
A good diagnosis starts with the right details. Let us know:
- When you need the work done
- What the building is and how it’s used
- Access details, including height
- Approximate linear metres or a joint schedule
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, phone 01277 525 020 or send photos by email.
FAQs: Portsmouth
How long do sealant joints last?
Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular checks let you plan resealing before leaks or damage.
Can you plan resealing across several buildings?
Block-wide and estate programmes are common. The quote can be split however suits your budgeting.
Is any job too small?
Single areas, one-off repairs and whole buildings are all quoted the same way: details, then a fixed price, then sealing, then a 12-month guarantee.
Do you work with property factors and landlords?
We do. Most of our mastic sealing is for agents, factors, housing associations and portfolio landlords and work can be quoted per building or as a whole.
Can you work to our specification?
Yes. Send it with your enquiry, and the quote will be based on it, flagging anything that needs clarifying.
Can you seal joints high up on a block?
Every block is different. How upper joints are reached is agreed before work is booked so there are no surprises.
What if the old mastic contains asbestos?
Asbestos removal isn’t part of our work. If old sealant is suspected, work stops until it’s tested, and the duty to manage asbestos sits with the dutyholder.