Construction and new-build mastic in Northam, Southampton
Sealant work in Northam for main contractors, managing agents and facilities managers: mastic packages for new-build and refurbishment projects, quoted at a fixed price.
- A mastic package split between trades with no clear owner
- Old sealant on a refurbishment that needs stripping before new work
- Window and door perimeters that won’t pass inspection
Construction mastic in Northam
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Why deal with it now?
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. A single mastic package gives one point of responsibility. Small buildings around Northam suffer from failed joints as much as large ones. Catching it early means a reseal rather than repairs.
Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we’ll put a fixed figure on it.
What you get with us
- A range of standard colours, depending on the product
- Failed material removed, not covered up
- CHAS accredited contractor
- Sealing commercial buildings since 2005
Take a look at how commercial sealant jobs are priced and our accreditations and insurance.
About our construction mastic in Northam
Buyers, tenants and clients notice sealant lines long before they notice the structure. A smeared bead round a window or a gap behind a worktop ends up on the snag list, and every return visit costs time. We seal so the snag list stays short, area by area through the programme. If you are dealing with frame gaps too wide for sealant alone and new external sealant already peeling away, we can help, on window and door perimeters, cladding and panel joints and internal decorators’ caulk alike. Facilities teams, main contractors and managing agents in Northam tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
Around places like Northam, a lot of construction is the conversion of older buildings, which leaves joints between old walls and new frames that need a sealant able to take the movement, in a colour the planners or architect are happy with.
Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.
- Location
- Northam (SO14, SO19, SO18)
- Wider area
- Southampton
- Cover
- A 12-month guarantee
- Quote
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Questions about Northam
Do you cover business parks and estates near Northam, such as Bitterne Business Centre?
Yes, sites like Bitterne Business Centre are within our area, along with the rest of Northam. Send details of the unit and the work through our quote form for a quick quote.
Would you work within a site like Royal South Hants Hospital?
Yes. We work in healthcare settings as well as offices and schools. Each area is agreed with the ward or department and the estates team in advance.
Can you quote from photos?
It depends on the job. Straightforward work can often be priced from photos and measurements, and bigger or more complex jobs usually get a visit.
Can you handle several sites?
Yes. We take on portfolio and planned maintenance work, with each site phased to suit its occupants.
Does the weather affect the work?
For external joints, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Inside work is seldom held up.
How soon can the area be used again?
The product and site conditions decide that. Some products skin over quickly but need longer to cure fully, and we confirm it before leaving site.
How do we ask for a quote?
You can use the quote form on this site; alternatively, phone 01277 525 020 or send photos by email. Photos, drawings or a joint schedule help us quote quickly.
Site staff or a sealant specialist?
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.
Certain joints really need a specialist: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.
Building owners, agents and FMs in Northam
If you look after buildings for someone else, you need clear quotes and clear reporting. You get a fixed quote, an agreed scope and a walk round at the end, plus a 12-month guarantee.
FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we will confirm them with the quote.
Also near Northam
More services for Northam
What we can’t put right
Part of a good diagnosis is knowing where sealant stops. You’ll hear from us if the cause turns out to be one of these:
- Glazing units that are cracked or misted
- Specifying the product where the designer hasn’t
- Frame gaps too wide for sealant, which the installer needs to correct
If you are not sure, just phone 01277 525 020 or email drawings and photos and we’ll give you a straight answer.
Surfaces we seal
- Internal decorators’ caulk
- Window and door perimeters
- Floor and skirting junctions
- Brick and block movement joints
- Cladding and panel joints
- Sanitary and kitchen joints
Diagnose, treat, sign off
In a busy building, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed, then handed back before we move to the next. Work in places the size of Northam is planned as a single visit where we can. Photos with rough sizes let us arrive with everything needed.
- First we take quantities off the drawings and read through the specification.
- We return a fixed quote that ties the mastic package to your programme.
- You tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we confirm it with the quote.
- Work follows the programme, area by area, as rooms and elevations become ready.
- Each joint is prepared, backed to depth and sealed in the product the specification names.
- Before handover, snags are dealt with and the package is signed off under our 12-month guarantee.
Getting the site ready
- Move anything stored against the joints
- Let building users know which areas are affected
- Tell us your opening times and when work is allowed
Quotes
Need a figure for a tender or a budget? We’ll quote against your scope and drawings that you can work with. For a chat about it beforehand, phone 01277 525 020 or email drawings and photos.
Advice
Sites and facades in and around Northam
Northam lies within about 2 miles of the sea. Coastal exposure means perimeter and cladding joints work harder than on an inland job, which puts weight on correct joint sizing, priming and a sealant suited to the exposure. A 2-mile radius around Northam takes in plenty of hotels. Hotel extensions and refits normally have to fit around bookings, so mastic dates are tight.
Work at a hotel such as Leonardo Hotel Southampton, 0.9 miles to the west of Northam, tends to be programmed around bookings, mastic included. Building work at universities like Solent University, 0.9 miles west of Northam, is often timed for the summer, mastic included.
Northam is about 1 mile south-east of Southampton, in Southampton. Northam sits inside our coverage, with the same fixed quotes and 12-month guarantee as everywhere else. 30 places across Southampton fall within our area, Northam among them.
Business premises anywhere in SO14, SO19 and SO18 are within our area for mastic packages. Buildings on Sea Road, Lumpy Lane and Cross Road are within our area for mastic packages. Sites close to Northam are covered too, including Peartree Green (1 mile south), Bitterne Manor (1 mile north), Itchen (1 mile south-east), St Mary's (1 mile south-west) and Bitterne (1 mile east). Further afield, our area takes in Regents Park (3 miles west), Maybush (3 miles north-west), Coxford (3 miles north-west), Lordswood (3 miles north-west), Millbrook (3 miles west) and Redbridge (4 miles west).
Landmarks near Northam
In Northam, that means premises near Inspire Enterprise Academy, East Park and The Engineers Arms. The nearest railway station is Bitterne station, about 0.6 miles north. A little further out are Bitterne Local History Society Heritage And Research Centre (0.8 miles east) and Marlands Shopping Centre (1.2 miles west). Open spaces near Northam include Netley Common.
What we’re called out for in Northam
Frames installed with uneven gaps make perimeter sealing harder. Sealant has a range of joint widths it can cope with, so gaps outside that range need sorting by the installer first. Better to raise it at the start than seal a joint that’s bound to fail.
Typical triggers for a call:
- Frame gaps too wide for sealant alone
- Snag items on joints that need redoing before handover
- Cracks opening in caulked internal joints
- Frame perimeters left unsealed or poorly sealed
Hospital estates such as Royal South Hants Hospital, 0.8 miles west of Northam, 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.
Comparing quotes
- What site paperwork they can supply
- How the existing material will be dealt with
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- Is the sealant right for the movement and the substrate?