Portmore mastic sealing
Mastic sealing for Portmore, from a contractor working since 2005. Fully insured, with a 12-month guarantee.
- Mastic failing across several blocks on an estate
- Window mastic that has split and shrunk
- Occupiers reporting cold air round windows
Mastic sealing near Portmore
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
How we handle mastic sealing in Portmore
Before work starts, most agents and landlords want the documents in order. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote. We’re a Constructionline member and CHAS accredited, and we carry public liability insurance. Site teams most often ask us about worn sealant at communal door frames and a mix of products and colours from past repairs, across balcony and threshold joints, communal kitchens and washrooms and external wall and movement joints. A single leaking joint is often how a building in Portmore first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Around smaller places like Portmore, older walls fitted with newer windows are a familiar sight. Perimeter mastic there has to grip an uneven face and suit the building’s character.
We stand by our work: 12 months, guaranteed. That covers our preparation and application.
- Where
- Portmore (SO41)
- Wider area
- Hampshire
- Cover
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
Diagnose, treat, sign off
We follow your site rules from the start: signing in, inductions and any permit to work. Once we are cleared to begin, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. Jobs in and around smaller places like Portmore are normally planned as a single visit, so we ask for photos and rough sizes first. Then the right materials arrive with us.
- We inspect the joints, building by building, and record what has failed and why.
- We send a fixed quote that sets out the joints, the products and the programme.
- The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
- Old sealant is stripped and each face prepared back to firm material.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Each building is checked on completion and the work carries our 12-month guarantee.
Getting the site ready
- Let building users know which areas are affected
- Send your site hours and access windows
- Tell us which areas need to stay in use
Getting a fixed quote
To get a fixed quote, call the office on 01277 525 020 or send details through our quote form, telling us the site location and the nature of the job. Our quote form is another easy route.
Advice
Nearby places to Portmore
Also in Portmore
Looking after buildings in and around Portmore
Portmore lies within about 1 mile of the sea. On buildings near the shore, the side facing the weather normally needs its mastic renewed first, so it’s worth inspecting those sides more often. Rainfall across the South East, Portmore included, is lower than in many parts of the UK. Outside mastic still needs a dry joint and the right temperature, and elevations facing the sun and the prevailing weather are usually where frame mastic ages first.
Schools and community buildings such as Southlands School need frame and external mastic kept sound like any building. With historic buildings such as Beaulieu Palace House (to the north-east of Portmore) in the wider area, owners of older properties around Portmore should expect mastic to need a product that suits old masonry. If you are responsible for a building such as Saint Nicholas Chapel, frame and door mastic needs the same attention as any other property.
Portmore is about 2 miles north-east of Lymington, in Hampshire. Commercial clients in Portmore use us for work on mastic joints. Our Hampshire coverage takes in 723 places. Our Southampton page has more on work in that area (11 miles or so).
Business premises anywhere in SO41 are within our area for mastic joints. Buildings on Warborne Lane, Jordans Lane and Main Road are within our area. We also cover Warborne (1 mile west), Pilley (1 mile north-west), Bull Hill (1 mile north), Pilley Bailey (1 mile north) and Walhampton (1 mile south). A short drive away, we cover Eastleigh (15 miles north-east), Fareham (15 miles east), Totton (10 miles north), Hedge End (14 miles north-east), Romsey (15 miles north) and Hythe (8 miles north-east).
Local landmarks in Portmore
In Portmore, that means premises near William Gilpin Church of England Primary School, Priestlands School and Walhampton Arms, among other places. The closest station to Portmore is Lymington Town station, about 1.1 miles south-west of the centre. Nearby you will also find Lymington New Forest Hospital (1 mile south-west) and Yarmouth Castle (4.8 miles south). The countryside around Portmore includes Boldre Foreshore.
Why deal with it now?
Resealing ahead of leaks keeps it to a maintenance task. After water has got in, there may be damp, damaged plaster or decoration to put right too and occupiers notice. Older rural buildings around Portmore move with the seasons, and rigid or tired sealant can’t keep up. The right product, sized to the joint, copes much better.
Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote and we’ll put a fixed figure on it.
Why clients in Portmore choose us
- Constructionline member
- Workmanship guaranteed for 12 months
- One phone line for London, the South East and Scotland
- Standard and matched colours in many product ranges
Read our cost guide and how we’re accredited.
How the quote is worked out
A fixed quote reflects the actual work. It allows for:
- The product specified
- How much existing material needs removing
- The site’s rules and procedures
- How accessible the joints are
What a job costs comes down to the quantity of joints, what has to come out first and how the joints are reached. Call for a fixed quote when you are ready.
Sending details for a quote
We can often quote from photographs and a few details. Please tell us:
- A wide shot and a close-up of the area
- What the building is and how it’s used
- The asbestos register, for older buildings
- Your programme or deadline
Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photographs and a few notes.
Common questions from Portmore clients
Can being near the sea in Portmore affect the sealant we need?
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.
Can you quote for a block close to Lymington Town station?
Yes. Blocks of any size are within what we do. Give us the building’s details and say how residents are notified, and we’ll quote and plan to suit.
Which sealant will you use?
If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
Does weather matter for sealant work?
It can, when the joints are outside. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Internal work is far less affected.
Can you follow the specification on our project?
Yes. Send it with your enquiry, and we’ll price the work to it, flagging anything that needs clarifying.
Do you guarantee the mastic work?
A 12-month guarantee covers our work. It covers our workmanship, not later building movement, damage or frame failures.
What about access for upper-floor joints?
Every block is different. How upper joints are reached is agreed before work is booked so there are no surprises.
General trades versus a specialist
Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.
General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class.
Building owners, agents and FMs in Portmore
Hospitality, education, healthcare, office and retail clients book us directly too. We plan around the way the building is used, so the building keeps working while we do.
When you manage a building on behalf of an owner, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.
What we can’t put right
A few problems need another trade or a different fix, and we say so rather than covering them up:
- Materials that need asbestos testing before work
- Frames that are rotten, warped or broken
- Substrate edges that need repairing first
Not sure which it is? You can give us a call on 01277 525 020 or use the quote form and we will tell you honestly.
Surfaces we seal
- Balcony and threshold joints
- Communal kitchens and washrooms
- Window and door perimeters on blocks
- Communal entrances and stairwells
- Shopfronts below residential blocks
- External wall and movement joints