Hersham construction mastic
Mastic packages for new-build and refurbishment projects throughout Hersham and nearby, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Snag items on joints that need redoing before handover
- New external sealant already peeling away
- Frame gaps too wide for sealant alone
Construction mastic across Hersham
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Sites and facades in and around Hersham
The South East is one of the drier parts of the UK. Winter mornings still bring frost and condensation on frames and panels, which is why external dates are agreed with the site manager. Several hotels sit less than 2 miles from Hersham. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up.
Projects at colleges like Brooklands Technical College - Weybridge Campus, 2.7 miles west of Hersham, tend to run to term dates, so the mastic is planned tightly. Hotel extensions and refits, at places such as Oatlands Chaser Hotel, 1.2 miles to the west of Hersham, normally run between busy periods, so the sealing is squeezed into short windows.
Hersham is about 1 mile south of Walton-on-Thames, in Surrey. We send applicators to Hersham for mastic packages, handled exactly as we handle every other area. Hersham is one of 379 places in Surrey on our list for mastic packages. For work in that direction, see our London page (16 miles or so).
Work on mastic packages is covered throughout KT12, for business premises of every kind. Streets here include Police Station Road, Queensway South and Queensway. With the A244 nearby, Hersham is easy to get to with materials and equipment. We also cover Burwood Park (1 mile south-west), Walton-on-Thames (1 mile north), Whiteley Village (2 miles south-west), St George's Hill (2 miles west) and Weybridge (2 miles west). Nearby towns on our patch include Guildford (11 miles south-west), Woking (8 miles south-west), Camberley (14 miles west), Epsom (6 miles east), Redhill (14 miles south-east) and Ewell (6 miles east).
Near you in Hersham
Around Hersham, our work takes us to commercial buildings near The Barley Mow Public House, West End Common and Three Rivers Academy, among other places. The closest station to Hersham is Walton-On-Thames station, roughly 0.6 miles north-west. A little further out are No. 2 New Zealand General Hospital (1.6 miles north-west) and Chessington Castle Hill (4.8 miles east). The countryside around Hersham includes Claremont Lake and Jubilee Wood.
How we handle construction mastic in Hersham
On refurbishments, the mastic package usually includes cutting out old sealant as well as sealing new work. Existing joints have to be stripped back to sound faces, because fresh sealant can’t key into cured silicone. After that, the joints are prepared and sealed to the specification. We work on brick and block movement joints, window and door perimeters and floor and skirting junctions, and what we are called in for most is window and door perimeters that won’t pass inspection and sealant knocked or painted over by other trades. Whether you call it commercial sealant work, mastic application or joint sealing, in Hersham it comes down to the same thing: the right product in a properly prepared joint.
In a smaller place such as Hersham, construction tends to mean small housing schemes, conversions and extensions to community buildings. Small schemes still need window perimeters, facade joints and internal sealant done to the specification.
Our 12-month guarantee is about workmanship, not wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we spell out the cover before we begin.
- Location
- Hersham (KT12)
- Wider area
- Surrey
- Cover
- A 12-month guarantee
- Quote
- Quoted before any work starts
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Questions we’re asked in Hersham
Does your area include sites such as Hersham Place Technology Park, near Hersham?
Yes. Our area takes in Hersham and its surroundings, with estates and business parks such as Hersham Place Technology Park included. To start, just ring 01277 525 020 or email the details over with the unit, the joints involved and your access times.
Is Hersham too far out for you?
Not at all. Hersham is within our area. We work across Greater London and the South East. Send photographs and a list of what needs doing, and we will plan the job to need as few trips as possible.
Can you work while the building is occupied?
Yes, as long as we plan it. Tell us your site hours and access windows and we will plan around them.
Are you CHAS accredited?
We’re CHAS accredited and a Constructionline member, with CSCS-carded applicators. We’re also fully insured, with five million pounds of public liability cover.
What guarantee comes with a mastic package?
It’s backed by our 12-month guarantee on the workmanship. Keeping other trades off finished joints prevents most problems.
Does weather affect external mastic work?
Weather matters for external sealing: each sealant has a temperature range, and the joint must be dry. We plan external elevations with that in mind.
Is any job too small?
Small jobs are welcome alongside larger packages. Send details for a fixed quote.
Different surfaces, different methods
Window and door perimeters
A frame gap that’s too wide can’t just be filled with sealant. Gaps outside the product’s range are raised with the site team.
Kitchens and utility areas
Worktop upstands, sinks and splashbacks are sealed once the kitchen is fitted. A kitchen-suitable sealant is used and hygienic or food-safe grades wherever food contact is possible.
On site: what to expect
We follow your site rules from the start: signing in, inductions and any permit to work. With the paperwork done, the joints are worked through in the order agreed with your site contact. For a job in Hersham, the main thing is a clear picture of the work. A fixed quote follows.
- Drawings, the sealant specification and your programme come to us for pricing.
- You receive a fixed quote listing scope, products and phasing.
- Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
- We seal each plot or floor as it’s released to us.
- Every joint is prepared, set to depth and sealed with the specified product.
- We close out snagging and hand over with a 12-month guarantee.
Getting the site ready
- Arrange parking or a loading space
- Share your working hours and any access restrictions
- Let building users know which areas are affected
Request a quote
To get a fixed quote, call 01277 525 020 or email drawings and photos, telling us the site location and the nature of the job. You can also send details through our quote form.
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What sets the cost
The price varies from site to site. It mainly depends on:
- Any access equipment needed
- Travel to remote or island sites
- Phasing around occupants
- Backing rod, priming and other preparation
The specified product makes a difference, as does the preparation each joint needs, such as cutting out, priming or new backing rod. Access, phasing and site requirements come into it too.
What we need to price the job
A few photos plus some basic facts will normally do. It helps to include:
- Photos of the joints, close up and from further back
- Asbestos survey details if the building is older
- The product your specification calls for
- Rough lengths or quantities, or drawings if you have them
Need a figure for a tender or a budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. For a chat about it beforehand, call the office on 01277 525 020 or send photos by email.
Nearby places to Hersham
More services for Hersham
Owners, agents and contractors
We work for building owners and managing agents on everything from one building to a spread of sites around Hersham. Several sites can go on one quote, which keeps the paperwork simple.
As a CHAS accredited contractor and Constructionline member, we are straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.
Common problems we fix in Hersham
Frames installed with uneven gaps make perimeter sealing harder. Sealant has a range of joint widths it can cope with, so gaps outside that range need sorting by the installer first. Better to raise it at the start than seal a joint that’s bound to fail.
Most enquiries start with one or more of the following:
- A mastic package split between trades with no clear owner
- Internal caulk splitting as the building dries out
- External joints sealed in damp or cold conditions that are now failing
- Window and door perimeters that won’t pass inspection
On a campus such as Kingston University Penrhyn Road Campus, which lies north-east of Hersham, new teaching buildings and residences are usually built and refurbished around the academic year.
What your quote should include
- Their public liability cover
- How the joint faces will be prepared and primed
- How they’ll work around occupants
- Will RAMS and insurance details be available?
After the work
To get the most from the new sealant:
- Stick to the specified sealant rather than a generic substitute
- Allow flexibility for external sealing in damp or cold weather
- Brief the final clean team to avoid blades near sealant
- Get the mastic subcontractor involved early in the programme
Once an area is sealed, protect it from following trades. New beads should be left to cure before cleaning or decorating nearby, and that time depends on the product, temperature and joint depth.
Sanitary joints that fail early become defects soon after occupation. Water gets behind trays, vanity tops and panels, leaving the remedial work to the contractor. Proper preparation, with the right silicone first time, keeps it off the defects list.