Mastic contractors in Upper Upnor
Mastic packages for new-build and refurbishment projects in Upper Upnor and across Medway. CHAS accredited and fully insured, with a 12-month guarantee.
- Caulk cracking where joints are moving more than expected
- Sealant knocked or painted over by other trades
- Mastic snags holding up handover
Need construction mastic in Upper Upnor?
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
About our construction mastic in Upper Upnor
Mastic tends to be one of the final packages before handover, which puts it right on the critical path. We work as a mastic subcontractor to main contractors and developers with projects in Upper Upnor, following the trades through the building as rooms and elevations become ready. If you have bath and shower joints scraped during the final clean and a long mastic snag list close to completion, we can put it right, on sanitary and kitchen joints, floor and skirting junctions and window and door perimeters alike. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in Upper Upnor it comes down to the same thing: the right product in a properly prepared joint.
For a site near Upper Upnor, the mastic visit is planned so the right sealants, primers and backing rod are on hand. Send drawings or photographs and the programme and we will quote to suit.
Our workmanship is guaranteed for 12 months. If our installation lets you down in that time, we return and fix it.
- Location
- Upper Upnor (ME2)
- Wider area
- Medway
- Guarantee
- 12 months on our workmanship
- Quote
- A fixed quote before we start
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Maintenance after handover
To get the most from the new sealant:
- Ask for joint and product checks before the package is urgent
- Ask installers to correct oversized gaps first
- Don’t force external sealing on a damp or frosty day
- Bring the mastic contractor in after the last trades are through
Expect some settlement in the first months. The right product in each joint copes with that while rigid fillers and caulk can crack where movement is larger. We can advise if a joint needs a different product.
Snag items left to the last week put handover at risk. Clearing snags area by area spreads the work out.
Different surfaces, different methods
Fire-rated sealant where specified
Fire-rated sealant forms part of some packages, installed to the product’s tested detail where it is specified. The design and sign-off of fire stopping sit with the designer, principal designer or fire engineer; we work to the specification and the manufacturer’s installation guidance.
External facade and movement joints
Brickwork, blockwork and panel movement joints need a sealant with the right movement capability. Depth is controlled with backing rod so the bead bonds to two sides only.
Signs you need construction mastic in Upper Upnor
On a live site, contamination is the biggest threat to a new joint. Dust, film adhesive, damp and grease on the joint faces prevent a proper bond, so preparation matters as much here as on a reseal.
Things that usually lead to an enquiry:
- External joints sealed in damp or cold conditions that are now failing
- Old sealant on a refurbishment that needs stripping before new work
- Oversized or tapered gaps around new frames
- A long mastic snag list close to completion
Hospital estates such as Medway Maritime Hospital (2 miles south-east of Upper Upnor) tend to grow and change in phases, often next to occupied wards, so facade and perimeter sealing has to fit the estates team’s plan.
What to look for in a quote
- Do they follow the manufacturer’s priming guidance?
- How they’ll work around occupants
- How joint depth will be controlled
- Will RAMS and insurance details be available?
From enquiry to sign-off
Where the site stays busy, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed, then handed back before we move to the next. If others near Upper Upnor need work, visits can be combined. You will have a fixed quote before work starts.
- First we look at the scope on site or from drawings.
- 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.
- Problems we find, such as oversized gaps, are raised straight away.
- The package is closed out, snags cleared and backed by our 12-month guarantee.
What we need from you
- Tell us which areas need to stay in use
- Tell us what induction or permit system the site runs
- Confirm the product named in the specification
Get a fixed quote
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 phone 01277 525 020 or send details through our quote form.
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Why it’s worth doing now in Upper Upnor
Leaving mastic to whichever trade is fitting the element can look cheaper on paper. The result tends to be uneven finishes and arguments about who should seal what. One mastic subcontractor for the lot keeps it simple. For buildings around smaller places like Upper Upnor, 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 work involved drives the cost: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote.
Why appoint us
- Matching to RAL references, product permitting
- Sealing commercial buildings since 2005
- Failed material removed, not covered up
- A Constructionline member, so easy to vet
Sites and facades in and around Upper Upnor
Upper Upnor sits close to the coast, within about 2 miles. Schemes this close to the sea see their facade joints tested by wind and rain from the day they’re sealed, which puts weight on correct joint sizing, priming and a sealant suited to the exposure. At about 27 miles from central London, Upper Upnor is within reach of the capital. 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.
University estates such as University of Kent - Medway Campus, 0.9 miles to the south-east of Upper Upnor, tend to have a rolling programme of new buildings and refurbishments, each with window perimeters and facade joints to seal. For a contractor at a hotel such as King Charles Hotel, which lies south-east of Upper Upnor, the mastic often has to be finished before a reopening date.
Upper Upnor is about 2 miles north-east of Rochester, in Medway. Anywhere in ME2, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Upper Upnor is one of 54 places in Medway on our list. For work in that direction, see our London page (27 miles or so).
We take on mastic packages across the ME2 postcode area. Among the streets we cover are High Street, Upnor Road and Castle Street. Close to Upper Upnor, our area also takes in Lower Upnor (1 mile north-east), Wainscott (1 mile north-west), Chattenden (1 mile north), Hoo St Werburgh (2 miles north-east) and Cooling Street (3 miles north). A short drive away, we cover Gillingham (3 miles south-east), Chatham (3 miles south), Rainham (5 miles south-east), Luton (3 miles south), Park Wood (5 miles south-east) and Lordswood (5 miles south).
Near you in Upper Upnor
In Upper Upnor, that means premises near The Kings Arms, Lower Lines Park and Waterfront University Technical College. Nearby too are Former Ordnance Store At Chatham Gun Wharf (1.4 miles south) and Waterfront UTC (1.3 miles south-east). The nearest railway station is Strood station, about 1.2 miles south-west. A little further out are French Hospital (1.5 miles south-west) and Pentagon Shopping Centre (1.6 miles south). For a walk, there’s Gad's Hill and Rede Common.
Questions about Upper Upnor
Is Upper Upnor too far out for you?
Not at all: smaller places are covered as well as towns. Our area covers London and the South East counties. We plan jobs in smaller places so return trips are kept to a minimum.
Does the sea air around Upper Upnor change the choice of sealant?
It can. Wind-driven rain and, closer to the shore, salt air are harder on external joints. We check the specified product suits the exposure and pay close attention to preparation.
Can you fit around our working hours?
We are in the office from 8am until 5pm, Monday to Friday. Let us know your site hours and access windows, and the work will be planned around them.
Does weather matter for sealant work?
It can, for external work. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so we watch the forecast and rearrange outside work if we have to. Indoors, the weather is rarely a problem.
Can you work to our specification?
We follow the specified sealant. Product standards such as BS EN 15651 are often named in specifications.
What if there’s asbestos in the old mastic?
Asbestos is possible in some older mastics, particularly in buildings from before 2000. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and if asbestos is suspected, work stops until it’s tested. Removing asbestos is a job for asbestos specialists, not us.
Can you work to our specification?
Yes. Include it with the drawings when you ask for a quote, and the quote will be based on it.
Also near Upper Upnor
More services for Upper Upnor
General trades versus a specialist
What you see is the finished bead, but most of the work is hidden. Backing rod, primer where specified and a joint designed to move with the building are where general trades tend to cut corners.
Paperwork matters too. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.