Mastic Sealing in Portsmouth Point
We carry out mastic sealing for building owners, managing agents and housing associations in Portsmouth Point and the surrounding area. Send photos or drawings for a fixed quote.
- Worn sealant at communal door frames
- The same joint failures repeated across a portfolio
- Leaks at window and door perimeters
Mastic sealing in Portsmouth Point
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Mastic sealing in Portsmouth Point
Mastic Doctor has sealed joints on commercial and residential blocks since 2005. Our applicators are CSCS-carded and we hold public liability insurance. Resealed mastic joints in Portsmouth Point carry our 12-month guarantee. If you have damaged joints in communal entrances and corridors and repeated reactive repairs to the same buildings, we can help. Facilities teams, main contractors and managing agents in Portsmouth Point tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
For landlords and associations with stock in and around Portsmouth Point, grouping buildings into one visit saves travel. One quote can cover a whole list of addresses.
Work we carry out in Portsmouth comes with a 12-month guarantee. Should something we installed fail, phone 01277 525 020 or send photos by email and we will come back to it.
- Location
- Portsmouth Point (PO1, PO5, PO12)
- Wider area
- Portsmouth
- Guarantee
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Frames, entrances and external joints in Portsmouth Point
Portsmouth Point sits close to the coast, within about 1 mile. For owners and agents with buildings near the sea, exposed elevations are where frame mastic fails first, and they deserve more regular inspection. Portsmouth Point is in the South East, one of the UK’s drier regions. Outside work still depends on dry joints, while the elevations that take the most sun tend to show hardened mastic first.
For owners of several units at places like Cranbourne Industrial Estate (1.1 miles west of Portsmouth Point), one programme can deal with frame and external mastic across the lot. If you look after a block within reach of Portsmouth Harbour station, which lies north of Portsmouth Point, frame and balcony mastic can be renewed on one programme.
Portsmouth Point is about 2 miles west of Southsea, in Portsmouth. We send applicators to Portsmouth Point for mastic joints. Our Portsmouth coverage takes in 19 places, large and small.
We take on mastic joints across the PO1, PO5 and PO12 postcode area, for business premises of every kind. Among the streets we cover are Park Road, Nobbs Lane and Bath Square, and sites on any of them can send details for a fixed quote. Sites close to Portsmouth Point are covered too, including Portsea (1 mile north), Clayhall (1 mile south-west), Haslar (1 mile south-west), Alverstoke (2 miles south-west) and Privett (2 miles west). Nearby towns on our patch include Hilsea (3 miles north-east), Wymering (4 miles north), Paulsgrove (4 miles north), Cosham (4 miles north-east), Drayton (5 miles north-east) and Farlington (5 miles north-east).
Landmarks near Portsmouth Point
We work on buildings around Charter Academy, Portsmouth Grammar School and Bridge Tavern, among other places. Portsmouth Point has its own railway station: Portsmouth Harbour station. Nearby you will also find Southsea Castle (1.2 miles south-east) and Portsmouth Museum And Art Gallery (under half a mile east). For a walk, there’s Portsdown Hill and Milton Locks.
After the work
After handover, a little attention goes a long way:
- Prioritise elevations facing the weather
- Make it easy for occupiers to report draughts
- Group repairs into a planned programme
- Keep bins and bikes away from communal door frames
Encourage occupiers to report water or draughts at frames. A quick report keeps a small repair small.
Mastic fails gradually, then all at once in a wet spell. Acting at the first signs keeps it a straightforward reseal and the complaints that come with it.
How a job runs
Occupied buildings need a little choreography. We sign and contain the area we are in, with routes through the building left open and work section by section so the rest of the building stays in use. Several jobs near Portsmouth Point can be grouped on one trip. Mention the building’s opening times and we’ll work within them.
- We check the asbestos register for older buildings and look at the joints.
- The products and programme are set out in a fixed quote.
- Failed mastic is removed completely.
- Joint faces are cleaned, backed and resealed.
- Buildings are completed in turn.
What we need from you
- Tell us which areas need to stay in use
- Tell us what induction or permit system the site runs
- Warn occupants and staff about the work
Quotes
For a fixed quote, call the office on 01277 525 020 or email a schedule or drawings. Our quote form is another easy route.
Read more
Common problems we fix in Portsmouth Point
Topping up old mastic is a common shortcut. New silicone has nothing to grip on old silicone and the repair soon fails.
It’s worth sending us details if you spot any of the following:
- Draught complaints from residents or tenants
- Failed external movement joints
- Complaints coming in block by block
- Window mastic that has split and shrunk
Owners of student blocks near University of Portsmouth - North Zone, 0.5 miles north-east of Portsmouth Point, can schedule frame and external mastic for the summer vacation.
Comparing quotes
- Proof of insurance
- Will CSCS-carded applicators be on site?
- How long is the guarantee, and what does it include?
- Their pre-qualification and accreditations
Leave it or put it right?
Mixed repairs by different contractors leave a patchwork of products and colours. A block-wide reseal gives one product, one colour and one guarantee and one 12-month guarantee. For buildings in places like Portsmouth Point, one well-planned visit beats several small ones, so we’d suggest renewing all the joints that are going, not just the worst.
Access can matter as much as the joints themselves: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.
What you get with us
- Constructionline member for supplier checks
- Old sealant cut out, never sealed over
- Fixed quotes based on photographs, drawings or a visit
- Work carried out by CSCS-carded applicators
See our cost guide or how we’re accredited.
What we can’t put right
Some faults sit outside our scope, and we say so rather than covering them up:
- Broken glass or failed sealed units
- Leaks through the frame itself rather than the perimeter
- Asbestos-containing sealant, which we don’t remove
Not sure which it is? You can give us a call on 01277 525 020 or email the details over and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Communal entrances and stairwells
- Window and door perimeters on blocks
- Shopfronts below residential blocks
- External wall and movement joints
- Communal kitchens and washrooms
- Balcony and threshold joints
Also near Portsmouth Point
Also in Portsmouth Point
Your questions answered
Does your area include sites such as Cranbourne Industrial Estate, near Portsmouth Point?
Yes, sites like Cranbourne Industrial Estate are within our area, along with the rest of Portsmouth Point. A few photographs and the unit address let us price the work.
Does the sea air around Portsmouth Point change the choice of sealant?
It can, yes: buildings near the sea take more wind-driven rain, and salt in the air nearer the shore. Product choice and preparation matter more, and sea-facing elevations are worth inspecting more often.
When is resealing likely to be due?
Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular inspection is the best way to catch problems early.
Does the weather affect the work?
Outside, 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.
Do you work for managing agents and housing associations?
Yes. Managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios are our main clients for this work, and we quote building by building or as a programme.
How soon can the area be used again?
The product and site conditions decide that. Some take light use quickly, others need longer to cure, so we will confirm the curing time on the day.
How much does the work cost?
Every job gets its own fixed quote. To get one, speak to us on 01277 525 020 or email drawings and photos with a description of the work.
Commercial clients in Portsmouth Point
If you look after buildings for someone else, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end, plus a 12-month guarantee.
CHAS accredited and a Constructionline member, we are straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.