Mastic sealant contractors in South Harewood
Our CSCS-carded applicators take on mastic sealing for building owners, managing agents and housing associations in South Harewood. Send details for a fixed quote.
- Brittle perimeter mastic across a building
- Repeated reactive repairs to the same buildings
- The same joint failures repeated across a portfolio
Mastic sealing near South Harewood
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Work for main contractors and building owners
For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. Programme, specification and site rules come first, and our applicators hold CSCS cards.
Hospitality, education, healthcare, office and retail clients come to us directly as well. The work is planned around how the building runs, so the building keeps working while we do.
How we handle mastic sealing in South Harewood
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 are CHAS accredited and a Constructionline member, with public liability insurance. We work on window and door perimeters on blocks, shopfronts below residential blocks and external wall and movement joints, and the failures we are asked to look at most are a mix of products and colours from past repairs and no planned programme for sealant. Searching for sealant specialists in South Harewood? We’ve been sealing commercial buildings since 2005, with CSCS-carded applicators.
Rural conversions near places like South Harewood 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.
We stand by our work with a 12-month guarantee. It covers how we prepared and applied the sealant, and we come back if anything isn’t right.
- Place
- South Harewood (SP11)
- Region
- Hampshire
- Cover
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Nearby places to South Harewood
More services for South Harewood
What sealant work can’t fix
Our job is the joint, not everything around it. On its own, sealant can’t deal with:
- Leaks from above rather than through a joint
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
- Leaks through the frame itself rather than the perimeter
If you are not sure, just give us a call on 01277 525 020 or use the quote form and we will give you a straight answer.
Where we work in South Harewood
- Communal kitchens and washrooms
- Communal entrances and stairwells
- External wall and movement joints
- Balcony and threshold joints
- Window and door perimeters on blocks
- Shopfronts below residential blocks
How the job changes by surface
Communal areas
Joints at low level in communal areas take knocks from bins, bikes and buggies and tend to fail first.
Planned maintenance
Adding mastic to planned maintenance avoids reactive repairs and spreads the work.
Common questions from South Harewood clients
We manage a building near Andover station. Can you help?
Yes, and several blocks can go on one quote. Photos of each elevation help us quote accurately.
Is South Harewood too small for you to travel to?
No. Places such as South Harewood are covered as much as the big towns. We work across Greater London and the South East. We plan jobs in smaller places so return trips are kept to a minimum.
Do you work with property factors and landlords?
We do. 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.
Can people stay in the building while you reseal?
The work is planned around occupiers. Dates and areas are agreed with you so residents or tenants can be told and communal access is kept open.
Does weather matter for sealant work?
It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so we watch the forecast and rearrange outside work if we have to. Internal work is far less affected.
Do you seal on top of existing sealant?
No. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.
When can the area be used after sealing?
The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
When to bring in a specialist
The visible bead is only part of the job. Backing rod, primer where specified and a joint designed to move with the building are where general trades tend to cut corners.
Certain joints really need a specialist: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong usually costs more in the end than doing them right.
Block-wide mastic in South Harewood
South Harewood is in the South East, one of the UK’s drier regions. Even so, frame mastic only goes on in dry, workable conditions, and south- and west-facing elevations, which take the most sun and rain, often age first. South Harewood is about 61 miles from central London. Around the capital’s commuter belt, managing agents look after many blocks close to stations and town centres.
For agents with blocks near Andover station, 4 miles to the north-west of South Harewood, a block-wide mastic programme deals with frames, balconies and entrances in one go. Landlords with units on estates such as Harewood Forest Industrial Estate, 0.7 miles north of South Harewood, can bring frame, door and external mastic across several units into one programme.
South Harewood is about 4 miles south-east of Andover, in Hampshire. Any commercial site in South Harewood is covered. We work across 723 places in Hampshire, from busy centres to rural villages. Our Southampton page has more on work in that area.
Work on mastic joints is covered throughout SP11. Nearby places we also cover include Wherwell (1 mile south-west), Wherwell Wood (2 miles west), Chilbolton (2 miles south-west), Cottonworth (2 miles south-west) and Fullerton (3 miles south-west). Bigger towns within reach include Basingstoke (15 miles north-east), Winchester (9 miles south-east), Eastleigh (15 miles south), Andover (4 miles north-west), Chandler's Ford (13 miles south) and Romsey (13 miles south).
Around South Harewood
The closest station to South Harewood is Andover station, roughly 4 miles north-west of the centre. Nearby you’ll also find Andover War Memorial Hospital (4.3 miles north-west) and Finkley Down Farm Museum (3.5 miles north-west). Green spaces nearby include Mill Lake and Anton Lakes.
When to call us in South Harewood
Poor preparation explains many failed joints. Where the faces weren’t cleaned or primed as specified, the bead peels off one side.
Typical triggers for a call:
- Window mastic that has split and shrunk
- Damaged joints in communal entrances and corridors
- Draught complaints from residents or tenants
- A mix of products and colours from past repairs
If your remit includes a building such as Wherwell Primary School, frame and door mastic can be programmed for the holidays.
Questions to ask before you book
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- Is the sealant right for the movement and the substrate?
- How the joint faces will be prepared and primed
- Whether their applicators hold CSCS cards
Diagnose, treat, sign off
On arrival, we report to your site contact and complete whatever induction the building runs. Everything around the joints gets protected before anything is cut or cleaned, and the work usually takes a few days for most blocks, with larger programmes scheduled building by building. Smaller jobs around South Harewood can be grouped with others nearby, which keeps travel down. You will have a fixed quote before work starts.
- A building-by-building inspection lists the failed joints.
- The quote is fixed and split as suits you.
- Dates and areas are agreed so occupiers can be told.
- Failed sealant is removed and the faces prepared.
- New sealant goes in with backing rod and primer where needed.
- We check the finished work and confirm the guarantee.
Preparing the site
- For older buildings, check the asbestos register before work
- Tell us which areas need to stay in use
- Make sure the joints can be reached
Get a fixed quote
The quickest route to a quote is a few photos and the site postcode. Send them through the quote form, or speak to us on 01277 525 020 or send photos by email if you’d rather talk the job through.