Mastic Sealing in Marchwood
Mastic sealing for building owners, managing agents and housing associations in Marchwood and across Hampshire. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Open joints in brickwork or panels
- Water getting in round frames after rain
- Cracked, hardened mastic round windows on a block
Mastic sealing across Marchwood
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Mastic sealing in Marchwood, done properly
Different joints need different sealants. Low-modulus neutral-cure silicone suits many window perimeters and external movement joints, while hybrid polymer sealants grip many materials and are often paintable, and colours are confirmed for whichever product is used. Site teams most often ask us about cracked, hardened mastic round windows on a block and repeated reactive repairs to the same buildings, across shopfronts below residential blocks, balcony and threshold joints and communal entrances and stairwells. A specialist sealant contractor works differently from a general builder: on jobs in Marchwood, preparation and product choice get the time they need.
Older buildings and conversions around places like Marchwood mix old masonry with newer frames. The mastic there needs to suit both surfaces.
Our workmanship is guaranteed for 12 months, in Marchwood as everywhere else we work. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Place
- Marchwood (SO40)
- Region
- Hampshire
- Guarantee
- 12 months on every job
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
What happens if it’s left?
Reacting to every complaint means sending someone out block by block. A planned programme treats each building once, under a single quote and a single programme. For buildings in places like Marchwood, one well-planned visit beats several small ones, so it’s worth dealing with every failing joint at once.
Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote and we will explain how it’s made up.
Why clients in Marchwood choose us
- Failed material removed, not covered up
- Workmanship guaranteed for 12 months
- Commercial sealant work since 2005
- A Constructionline member, so easy to vet
See our cost guide or our accreditations.
Should maintenance staff do it?
For a quick touch-up, site staff may be fine, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
Block-wide mastic in Marchwood
The sea is no more than about 1 mile from Marchwood. Sea-facing elevations take driven rain and salt, and their mastic shows it before the sheltered sides do. Rainfall across the South East, Marchwood included, is lower than in many parts of the UK. Outside work still depends on dry joints, and the sunniest, most exposed sides of a building usually need attention first.
For agents with blocks near Millbrook (Hants) station, 1.6 miles to the north-east of Marchwood, a block-wide mastic programme deals with frames, balconies and entrances in one go. If you manage student housing near a university such as Southampton Solent University, 2.5 miles to the north-east of Marchwood, the summer turnaround is the time for mastic. If you own or manage units on a site such as Marchwood Industrial Park, 0.7 miles north-east of Marchwood, failed mastic on frames, door surrounds and external joints can be dealt with unit by unit.
Marchwood is about 3 miles south-east of Totton, in Hampshire. Any commercial site in Marchwood is covered, whether it’s a single job or part of a planned programme. 723 places across Hampshire fall within our area, including Marchwood.
Commercial sites across SO40 are covered. Among the streets we cover are Cranberry Close, Melick Close and The Rowans. Marchwood sits on or close to the A326, which helps when planning parking and deliveries for the job. Sites close to Marchwood are covered too, including Dibden (2 miles south-east), Dibden Purlieu (3 miles south-east), Hythe (3 miles south-east), Beaulieu (5 miles south) and Furzey Lodge (5 miles south). Nearby towns on our patch include Winchester (13 miles north-east), Gosport (14 miles south-east), Eastleigh (7 miles north-east), Fareham (11 miles east), Totton (3 miles north-west) and Chandler's Ford (7 miles north-east).
Landmarks near Marchwood
Around Marchwood, our work takes us to commercial buildings near White Horse pub and Hounsdown School. The closest station to Marchwood is Millbrook (Hants) station, roughly 1.6 miles north-east. Other landmarks nearby include Netley Castle (4.1 miles east) and Westquay (2.1 miles east). Green spaces nearby include Testwood Lakes.
Places near Marchwood
More services for Marchwood
Marchwood: questions and answers
Do you work for managing agents with blocks near Millbrook (Hants) station?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Send the address, photographs of the elevations and your access arrangements, and we’ll give a fixed quote.
Our building in Marchwood is near the coast: does that change the sealant?
It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. Product choice and preparation matter more, and sea-facing elevations are worth inspecting more often.
What if the old mastic contains asbestos?
We don’t remove asbestos-containing materials. Anything suspect is tested before we carry on, and the duty to manage asbestos sits with the dutyholder.
Which sealant will you use?
If the job is specified, we follow the specification. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.
How long before the joints can be used?
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.
Can you work to our specification?
Yes. The specification and the manufacturer’s installation guidance are what we work to.
Does weather matter for sealant work?
It can, for external work. 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.
When something else is needed
Part of a good diagnosis is knowing where sealant stops. You will hear from us if the cause turns out to be any of the following:
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
- Failed window or door frames, which need a window contractor
- Substrate edges that need repairing first
If in doubt, speak to us on 01277 525 020 or email drawings and photos and we’ll say what we think before you book.
Surfaces we seal
- Communal kitchens and washrooms
- Communal entrances and stairwells
- Window and door perimeters on blocks
- Balcony and threshold joints
- External wall and movement joints
- Shopfronts below residential blocks
How a job runs
At the end of each section, the masking comes off, the area is cleaned and every joint is checked. If an area should be left alone while the sealant cures, we say how long and put signs out. For a job in Marchwood, the main thing is a clear picture of the work. You will then get a fixed price for the work.
- A building-by-building inspection lists the failed joints.
- The quote is fixed and split as suits you.
- We agree the programme and dates with you.
- Failed sealant is removed and the faces prepared.
- Joints are resealed and tooled.
- We check the finished work and confirm the guarantee.
What we need from you
- Have the specification and drawings to hand
- Tell staff and tenants when we will be in
- Explain the parking and delivery arrangements
Ask for a quote
Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, ring 01277 525 020 or email drawings and photos.
Advice
What affects the price in Marchwood
Quotes vary with the job. It mainly depends on:
- Working within restricted access windows
- Quantities, in metres or numbers
- Travel to remote or island sites
- The size and state of each joint
Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. Send the details and a fixed figure follows.
Details that help us quote
For an accurate fixed quote, we need a clear picture of the site. Send us:
- Clear photos of the problem areas
- Specification clauses that apply
- Approximate linear metres or a joint schedule
- Anything awkward about access or site hours
If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price against exactly what is specified. For smaller jobs, photos and a description will do.
Different surfaces, different methods
Planned maintenance
Resealing can be scheduled alongside other planned works on a timetable you set.
Window and door perimeters on blocks
We normally work through a block’s windows in a planned order. Access is agreed with you before the quote is fixed.