South East England and London
Construction Mastic in Portsmouth
We cover 19 towns and villages in Portsmouth for construction mastic, with failed joints always cut out and a 12-month guarantee on our workmanship.
Construction Mastic across Portsmouth
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Towns we cover in Portsmouth
Mastic packages for new-build and refurbishment projects. Pick your town below to see the details for your area, or call or email us for a quote.
Main towns
More services in Portsmouth
- Fire-rated sealing and fire stopping
- Industrial and floor joint sealing
- Commercial sealant contractors
- Expansion and movement joint sealing
- Facade and window perimeter sealing
- Commercial washroom and wet-area sealing
- Mastic sealing for building owners and managing agents
- Coloured and colour-matched sealant
Postcodes in Portsmouth
How construction mastic works in Portsmouth
Site managers want applicators who turn up with the right cards and paperwork. Our applicators are CSCS-carded, and we’re CHAS accredited and a Constructionline member, and we are fully insured. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We work on floor and skirting junctions, internal decorators’ caulk and brick and block movement joints, and the usual reasons a site gets in touch are bath and shower joints scraped during the final clean and failed sealant in an existing building being refurbished.
We schedule the visit to fit the site hours and access windows you give us. While we’re working, the area stays contained and tidy, and we check in with your contact before moving on to each new area.
- We walk the site or review drawings to understand the package.
- A fixed quote sets out scope, products and phasing.
- Site paperwork is confirmed and our CSCS-carded applicators are inducted.
- We seal plot by plot or floor by floor in line with the programme.
- Any frame gaps or issues outside our scope are flagged to the site team.
- Final snagging is completed and the 12-month guarantee applies.
What affects the price in Portsmouth
Cost follows what’s involved: stripping out, preparation, sealing, access and phasing. Call for a quote.
Why appoint us
- Coloured sealants to suit the setting, where available
- Constructionline member
- One number for every site we cover
- Specification-led, product-correct work
Get a fixed quote
Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we’ll fill any gaps with a visit.
Around Portsmouth
Locally, jobs take us to sites close to Manor Infant School, Alexandra Park and St Wilfrid. Other local landmarks include The Druids Arms (under 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). Portsmouth’s nearest station is Fratton station, about 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). Green spaces nearby include Milton Locks and Portsdown Hill.
New build and refurbishment in Portsmouth
Our CSCS-carded applicators work on sites across Portsmouth, from Southsea, Milton and Landport to smaller schemes. Send drawings, the programme and your paperwork requirements, and we’ll confirm everything with the quote.
Around the motorway corridors of the South East, business parks and industrial estates are common, and Portsmouth is part of the area we cover. Coastal places in Portsmouth often have hotels, guest houses and holiday accommodation with busy seasons, which makes the quieter months a good time for sealant work.
Portsmouth: New units and refits on sites such as Victory Retail Park (0.5 miles west of Portsmouth) need their panel and perimeter joints sealed to the specification. Projects at colleges like Portsmouth College (1.5 miles east of Portsmouth) tend to run to term dates, so the mastic is planned tightly.
For managing agents and facilities managers
Housing associations and managing agents often need work done across blocks and communal areas. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
We work for building owners and managing agents on everything from one building to a spread of sites. One quote can cover more than one site, which keeps the paperwork simple.
Surface by surface
External facade and movement joints
Brickwork, blockwork and panel movement joints need a sealant with the right movement capability. We set the depth with backing rod to avoid three-sided adhesion.
Internal decorators’ caulk
Where the specification calls for it, acrylic decorators’ caulk goes on non-moving internal gaps before painting. It’s paintable and suits gaps that don’t move, and we use a flexible sealant where there’s movement.
Site staff or a sealant specialist?
For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class.
For a quick touch-up, site staff may be fine, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
What affects the price in Portsmouth
The price varies from site to site. Expect it to depend on:
- Joint width, depth and condition
- Induction, permit and paperwork requirements
- Removal of failed or old sealant
- The total length or number of joints
The product called for affects the cost, as does the preparation each joint needs. Access, phasing and site requirements come into it too.
Details that help us quote
A few photographs plus some basic facts will normally do. Please tell us:
- Whether the building will be occupied during the work
- The asbestos register, for older buildings
- Approximate linear metres or a joint schedule
- Clear photographs of the problem areas
Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To ask for one, give us a call on 01277 525 020 or send photos by email.
Why act early?
Some packages split mastic across the window fitter, kitchen fitter and plumber. In practice it often means different standards, gaps in responsibility and snags nobody owns. One mastic subcontractor for the lot keeps it simple, with the same standard on every plot.
Comparing quotes
- The named product and why it was chosen
- What the guarantee covers, and for how long
- Can the work be phased to keep areas open?
- What site paperwork they can supply
FAQs: Portsmouth
Do you take on small jobs?
Whatever the size, the process is the same: details, then a fixed price, then sealing, then a 12-month guarantee.
Can you fit around our working hours?
The office is staffed Monday to Friday, from 8am until 5pm. Let us know your site hours and access windows, and the work will be planned around them.
Can you clear a mastic snag list before handover?
Yes. Share the list and photographs, and a fixed quote follows.
What guarantee comes with a mastic package?
Our workmanship carries a 12-month guarantee from sign-off. The guarantee covers our work, not later damage by other trades.
How long do sealant joints last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.
Are you fully insured?
Yes. Our insurance certificate can be sent alongside the quote.
Do you work to architects’ specifications?
Yes. We follow the specification, along with the manufacturer’s installation guidance, and we raise anything unclear before work begins.