Mastic contractors in Northney
Sealant work in Northney for main contractors, managing agents and facilities managers: mastic packages for new-build and refurbishment projects, with a fixed quote first.
- New external sealant already peeling away
- Old sealant on a refurbishment that needs stripping before new work
- Cracks opening in caulked internal joints
Need construction mastic in Northney?
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
About our construction mastic in Northney
Getting a subcontractor through site induction should be simple. We are a Constructionline member and CHAS accredited, and every applicator holds a CSCS card, and we are fully insured. RAMS, an insurance certificate and CSCS details can be confirmed with the quote if you tell us what you need. If you have old sealant on a refurbishment that needs stripping before new work and a mastic package split between trades with no clear owner, we can put it right, whatever the surface. Searching for sealant specialists in Northney? Mastic Doctor has worked for contractors, FMs and building owners since 2005, with CSCS-carded applicators.
Sites around smaller places like Northney can be a fair drive from suppliers, so we come with everything the package needs, timed to the stage the job has reached. Send drawings or photos and the programme and we will quote to suit.
We stand by our work with a 12-month guarantee. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.
- Place
- Northney (PO11)
- Wider area
- Hampshire
- Cover
- A 12-month guarantee
- Quotes
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Work for main contractors and building owners
Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
Agents, factors and owners’ representatives all follow the same route: send details, get a fixed quote, we seal, guaranteed. Keys, access and contacts can be agreed in advance.
Why act early in Northney
Refurbishments sometimes budget for new windows when the frames are sound and only the seal has failed. If the frame is in good order, cutting out and resealing the perimeter can be all it needs. If the frame is life-expired, we’ll tell you. One visit to deal with every failing joint makes more sense than several trips to a place like Northney, rather than one at a time. Send photos of each area and we’ll quote for the lot.
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.
Why clients in Northney choose us
- Specification-led, product-correct work
- Health and safety: CHAS accredited
- Sealing commercial buildings since 2005
- One contact handling all your sites
Read our cost guide or our accreditations.
Mastic packages on Northney sites
Northney is within about 1 mile of the coast. Schemes this close to the sea see their facade joints tested by wind and rain from the day they’re sealed, so joint design, primers and product choice deserve extra care. A 2-mile radius around Northney takes in several hotels. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades.
For contractors on a campus like University of Portsmouth - Langstone Campus, 4.1 miles south-west of Northney, facade and perimeter sealing has to fit around students and term dates. Work at a hotel such as Ropemaker Hotel, 1.4 miles to the north of Northney, tends to be programmed around bookings, mastic included.
Northney is about 3 miles south-east of Havant, in Hampshire. We cover Northney, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Across Hampshire, 723 places are covered, including Northney.
Postcode districts covered here: PO11. If your site is on Northney Lane, Spinnaker Grange and Northney Road or close by, send details and we’ll quote for mastic packages. Nearby places we also cover include North Hayling (1 mile south), Warblington (1 mile north), Tye (1 mile south), Stoke (1 mile south-west) and Langstone (1 mile north-west) for mastic packages. A short drive away, we cover Gosport (8 miles west), Havant (3 miles north-west), Fareham (10 miles west), Horndean (6 miles north), Waterlooville (5 miles north-west) and Petersfield (12 miles north).
Around Northney
In Northney, that means premises near Eames Farm and The Ship Inn, among other places. Northney’s nearest station is Warblington station, about 1.7 miles north of the centre. A little further out are Havant Museum (1.7 miles north-west) and Havant War Memorial Hospital (2.1 miles north-west). Not far away are Hayling Billy.
Questions we are asked in Northney
Our building in Northney is near the coast: does that change the sealant?
It can. Coastal exposure works external joints harder than inland weather. We check the specified product suits the exposure and pay close attention to preparation.
Will you plan work around the academic year at somewhere like University of Portsmouth - Langstone Campus?
Yes, holiday working periods are the norm on campus jobs. Let us know which documents your site asks for, and we’ll confirm them alongside the quote.
Do your applicators hold CSCS cards?
We are CHAS accredited and a Constructionline member, with CSCS-carded applicators. We are also fully insured, with five million pounds of public liability cover.
Are you insured?
Yes. Mastic Doctor is fully insured, public liability included.
What’s the quickest route to a quote?
You can use the quote form on this site; alternatively, speak to us on 01277 525 020 or send details through our quote form. Include photos or drawings if you have them.
Can you fit around our programme?
We seal plot by plot or floor by floor as areas are released. The sequence is settled with your site team.
Will you just go over the old sealant?
No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.
On site: what to expect
Working in a building that stays open takes some planning. We sign and contain the area we are in, keep walkways clear and move on in phases so staff and visitors can carry on around us. If others near Northney need work, visits can be combined, which keeps travel down. A fixed quote is given before anything starts.
- First we look at the scope on site or from drawings.
- You receive a fixed quote covering scope, products and sequence.
- 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.
Preparing the site
- Tell staff and tenants when we’ll be in
- Point out any areas we must not close
- Explain the parking and delivery arrangements
Quotes
Let us know the site, the scope and your timescale, and we will put a fixed quote together. To get it moving, speak to us on 01277 525 020 or email a schedule or drawings.
Advice
What the job involves on each surface
Internal decorators’ caulk
Acrylic caulk fills internal gaps around trims, boards and frames ahead of decorating. It’s for gaps that stay still and get painted while moving joints need a flexible sealant.
Window and door perimeters
A frame gap that’s too wide can’t just be filled with sealant. Gaps outside the product’s range are raised with the site team.
What we can’t put right
A proper diagnosis includes knowing what sealant can’t do. You’ll hear from us if the cause turns out to be any of the following:
- Rework caused by others damaging completed areas
- Frame gaps too wide for sealant, which the installer needs to correct
- Designing joint widths or choosing the specification (that sits with the designer)
If you are not sure, just ring 01277 525 020 or email us and we’ll give you a straight answer.
Where we work in Northney
- Window and door perimeters
- Cladding and panel joints
- Sanitary and kitchen joints
- Internal decorators’ caulk
- Floor and skirting junctions
- Brick and block movement joints
Also near Northney
Also in Northney
Common problems we fix in Northney
Shrinkage and settlement in the first months put new joints under strain. Plaster, screeds, timber and blockwork all shrink as they lose moisture and internal caulk in a moving joint is usually the first to crack. Picking a flexible sealant where there’s movement keeps snags down.
These are often picked up first by site or facilities staff:
- Failed sealant in an existing building being refurbished
- Inconsistent sealant finishes from plot to plot
- Internal caulk splitting as the building dries out
- Frame gaps too wide for sealant alone
New wings at hospitals like Elmleigh Hospital (to the north of Northney) bring long runs of window and panel joints to seal.
Comparing quotes
- What site paperwork they can supply
- What level of public liability insurance do they hold?
- Is the sealant right for the movement and the substrate?
- Who will actually carry out the work