Mastic Sealing in Downton
We carry out mastic sealing for building owners, managing agents and housing associations in Downton and the surrounding area. Send details for a fixed quote.
- Old repairs sealed over failed mastic
- Cracked, hardened mastic round windows on a block
- Repeated reactive repairs to the same buildings
Mastic sealing across Downton
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 Downton
Before work starts, most agents and landlords want the documents in order. For documents, tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We are CHAS accredited and a Constructionline member, with public liability insurance. We work on window and door perimeters on blocks, external wall and movement joints and balcony and threshold joints, and the failures we are asked to look at most are a mix of products and colours from past repairs and occupiers reporting cold air round windows. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Downton, that means joint design, primers and backing rod as standard.
Rural conversions near places like Downton often set modern frames into older stone, flint or brick. The mastic needs to suit an irregular masonry face and the look of the building.
Work we carry out comes with a 12-month guarantee. Should something we installed fail, give us a call on 01277 525 020 or email drawings and photos and we’ll come back to it.
- Place
- Downton (SO41)
- Region
- Hampshire
- Cover
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Updated
- 3 November 2026
How the job changes by surface
Commercial and mixed-use buildings
Mixed-use buildings combine shops below with flats or offices above, so phasing has to suit both. Tell us your site hours and access windows and we’ll plan around them.
Tenement and older buildings
Traditional buildings have joints that need a careful approach. We look at the substrate before choosing a sealant.
What sealant work can’t fix
We check first that sealant really is the fix. It isn’t the answer for:
- Masonry that has broken away beside the joint
- Frames that are rotten, warped or broken
- Water coming in from the roof or rainwater goods
If you are not sure, just call 01277 525 020 or send photos by email and we will give you a straight answer.
Joints and surfaces we work on
- Balcony and threshold joints
- Communal entrances and stairwells
- External wall and movement joints
- Window and door perimeters on blocks
- Communal kitchens and washrooms
- Shopfronts below residential blocks
FAQs: Downton
Does a coastal location like Downton affect which sealant is used?
It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. We choose the product for the exposure, prime where the manufacturer requires it and size the joint for its movement.
Can you work in a care home near Downton with residents in?
Yes. We agree rooms and times with the manager and work a few areas at a time. Tell us about any infection-control or safeguarding requirements and we’ll work to them.
Is it fine to apply new sealant on top of old?
No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.
Do you take on small jobs?
We quote for single jobs as well as large packages and programmes. Photos and a description are enough to start.
How do we ask for a quote?
The quote form is the simplest route, though you can also speak to us on 01277 525 020 or send photos by email. Include photos or drawings if you have them.
What about access for upper-floor joints?
We talk through access for each building when we quote. Tell us the building height and any access already in place and we will confirm the approach in the quote.
How much does the work cost?
Every job gets its own fixed quote. To get one, call the office on 01277 525 020 or email us with a description of the work.
Why it’s worth doing now in Downton
Leaving failed external joints lets water reach the structure behind. That can lead to damp, staining and damage to finishes and those cost far more to put right. Older rural buildings around Downton move with the seasons, and rigid or tired sealant can’t keep up. The right product, sized to the joint, copes much better.
Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits.
What you get with us
- A range of standard colours, depending on the product
- Matching to RAL references, product permitting
- Colours confirmed for the specified product
- Failed material removed, not covered up
Read how commercial sealant jobs are priced or our accreditations and insurance.
Site staff or a sealant specialist?
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.
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, which is what makes a joint last.
Aftercare for building managers
After handover, a little attention goes a long way:
- Mention RAMS, insurance or CSCS requirements up front
- Share the asbestos register when you send details
- Encourage occupiers to report problems at frames
- Keep a record of when each building was resealed
Where a paintable product was specified, it can be painted after curing. Non-paintable silicone shouldn’t be painted over unless told otherwise.
Joints on a building age together so a single failure is a sign to check the rest. A planned reseal saves repeated visits.
Blocks and managed buildings in Downton
Downton sits close to the coast, within about 1 mile. Sea-facing elevations take driven rain and salt, and their mastic shows it before the sheltered sides do; plan inspections around that. Rainfall across the South East, Downton included, is lower than in many parts of the UK. External mastic still waits for dry faces and the right temperature, and elevations facing the sun and the prevailing weather are normally where frame mastic ages first.
Older community buildings, Church of All Saints among them, often have frames of mixed ages whose mastic varies. Site managers at schools like Hordle CofE (VA) Primary School can fit frame mastic into the summer works. Landlords with units on estates such as Gore Road Industrial Estate, 2.4 miles to the west of Downton, can bring frame, door and external mastic across several units into one programme.
Downton is about 3 miles west of Lymington, in Hampshire. Across the SO41 postcode area, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Our Hampshire coverage takes in 723 places, from busy centres to rural villages. Our Southampton page has more on work in that area.
We cover the SO41 postcode districts. Streets here include Hordle Lane and Shorefield Road. Nearby places we also cover include Leagreen (1 mile east), Hordle (1 mile north), Ashley (2 miles north-west), Barton on Sea (2 miles west) and New Milton (2 miles north-west). Bigger towns within reach include Totton (13 miles north), Lymington (3 miles east), Hythe (13 miles north-east), Ringwood (10 miles north-west), Dibden Purlieu (12 miles north-east) and Marchwood (13 miles north-east).
What’s near Downton
Locally, jobs take us to sites close to The Arnewood School and the streets around them. Downton’s nearest station is New Milton station, about 2 miles north-west. Well-known places in the area include Lymington New Forest Hospital (3.7 miles north-east) and Sammy Miller Motorcycle Museum (2.9 miles north-west). Not far away are Milford on Sea LNR.
Diagnose, treat, sign off
The first thing on site is a walk round with your contact, to confirm the scope, the order of work and any areas we must keep clear. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. Jobs in and around smaller places like Downton are usually planned as a single visit, so photographs and measurements up front really help. Then the right materials arrive with us.
- First comes a look at the joints and, for older buildings, the asbestos records.
- The products and programme are set out in a fixed quote.
- We strip out the old sealant.
- Joint faces are cleaned, backed and resealed.
- We finish each building before moving to the next.
What we need from you
- Warn occupants and staff about the work
- Share your working hours and any access restrictions
- Make sure the joints can be reached
Quotes
A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Share whatever details you have and we will fill any gaps with a visit.