Construction and new-build mastic in Offham, East Sussex
Mastic packages for new-build and refurbishment projects throughout Offham and nearby, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Bath and shower joints scraped during the final clean
- Failed sealant in an existing building being refurbished
- Frame perimeters left unsealed or poorly sealed
Construction mastic for Offham sites
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
About our construction mastic in Offham
Mastic follows everyone else, which means it absorbs every delay upstream. We agree a sequence at the start and adjust it as the site manager releases areas. Sealing too early only means coming back once others have damaged it. We work on sanitary and kitchen joints, floor and skirting junctions and internal decorators’ caulk, and what we are called in for most is a long mastic snag list close to completion and bath and shower joints scraped during the final clean. A single leaking joint is often how a building in Offham first comes to us: we look at the rest while we are there and tell you what we find.
In the countryside around places like Offham, conversion schemes put new frames into old stone, flint, brick or timber. A product that grips an irregular face, with a colour that suits the building’s character, is normally what’s needed.
Work we carry out comes with a 12-month guarantee. Should something we installed fail, speak to us on 01277 525 020 or email us and we’ll come back to it.
- Place
- Offham (BN7)
- Region
- East Sussex
- Guarantee
- A 12-month guarantee
- Price
- Quoted before any work starts
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
Diagnose, treat, sign off
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Any old material is cut back to clean, sound faces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. If others near Offham need work, visits can be combined. You will have a fixed quote before work starts.
- First we take quantities off the drawings and read through the specification.
- A fixed quote sets out the scope, the products and the sequence.
- 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.
- Joints are cleaned, primed where the maker requires it, backed and sealed to the specification.
- We close out snagging and hand over with a 12-month guarantee.
Before we start on site
- Explain the parking and delivery arrangements
- Tell us which areas need to stay in use
- Confirm the product named in the specification
Ask for a quote
Send us photos, drawings or a joint schedule are often enough for a fixed quote. Where a site visit makes more sense, we will arrange one.
Read more
Common problems we fix in Offham
Shrinkage and settlement in the first months put new joints under strain. Materials lose construction moisture and shrink, which opens up internal joints, particularly where caulk has been used in a joint that moves. Picking a flexible sealant where there’s movement keeps snags down.
Site and facilities staff are often the first to spot these:
- External joints sealed in damp or cold conditions that are now failing
- Internal caulk splitting as the building dries out
- Different trades sealing to different standards
- Oversized or tapered gaps around new frames
For contractors at a college like East Sussex College, 1.9 miles south-east of Offham, perimeters and internal sealant are timed for the holidays.
Comparing quotes
- Their approach to joint depth and backing
- The terms of the workmanship guarantee
- Can the work be phased to keep areas open?
- Are they CHAS accredited or on Constructionline?
Surface by surface
Window and door perimeters
Perimeter joints between frames and the structure are the weather line on any new building. They’re sealed with a low-modulus neutral-cure silicone or another product named in the specification, with backing rod in deeper gaps.
External facade and movement joints
External movement joints often need primer, depending on the substrate. Primer goes on where the sealant maker calls for it.
Your questions answered
Is Offham too small for you to travel to?
Not at all. Offham is within our area. Our area covers London and the South East counties. Good photographs up front let us bring everything on the first visit.
Can you take on a job at a hospital such as Lewes Victoria Hospital?
Yes. We work in healthcare settings as well as offices and schools. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Are you fully insured?
Yes. Our insurance certificate can be sent alongside the quote.
What’s the quickest route to a quote?
The quote form is the simplest route, though you can also give us a call on 01277 525 020 or email drawings and photos. Photos, drawings or a joint schedule help us quote quickly.
Will you stick to the specified products?
Specification first, then the maker’s instructions. Preparation, backing and depth follow the product guidance.
Do you do internal caulk as well as external mastic?
External and internal frame perimeters, caulking where it’s specified, sanitary silicone, kitchen joints and snagging before handover. The scope follows your specification.
Is any job too small?
Single areas, one-off repairs and whole buildings are all quoted the same way: details, then a fixed price, then sealing, then a 12-month guarantee.
Mastic packages on Offham sites
The South East is one of the drier parts of the UK. Winter mornings still bring frost and condensation on frames and panels, so we time external mastic for dry faces and agree it with the site team. A 2-mile radius around Offham takes in several hotels. When hotels extend or refit, the work is normally squeezed between peak periods, mastic included.
Hotels like Pelham Arms Hotel (1.4 miles south-east of Offham) rarely close for long, so refurbishment mastic is phased floor by floor. New units and refits on sites such as Riverside Industrial Estate, 1.3 miles south-east of Offham, need their panel and perimeter joints sealed to the specification.
Offham is about 1 mile north-west of Lewes, in East Sussex. Across the BN7 postcode area, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. We work across 308 places in East Sussex. For work in that direction, see our Brighton page, about 7 miles away.
Commercial sites across BN7 are covered for mastic packages. Close to Offham, our area also takes in Hamsey (1 mile north-east), Lewes (1 mile south-east), South Malling (1 mile south-east), Southover (2 miles south-east) and Cliffe (2 miles south-east). Further afield, our area takes in Eastbourne (15 miles south-east), Seaford (10 miles south-east), Hailsham (12 miles east), Crowborough (14 miles north-east), Uckfield (7 miles north-east) and Newhaven (7 miles south).
Near you in Offham
Recent enquiries here include premises near Railway Land, The Blacksmiths Arms and Lewes Old Grammar School. Offham’s nearest station is Cooksbridge station, roughly 0.9 miles north of the centre. Other landmarks nearby include Brighton And Hove Albion Football Club Museum (3.8 miles south-west) and Lewes Castle (1.5 miles south-east). Open spaces near Offham include Malling Down and Offham Hill.
What sets the cost
To price the job, we consider:
- Quantities, in metres or numbers
- Distance, for remote addresses
- Phasing around occupants
- The size and state of each joint
A quote for mastic packages depends on how many there are, their condition and the access, and any specification that applies. Call for a quote.
What we need to price the job
A few photographs plus some basic facts will normally do. Please tell us:
- Asbestos survey details if the building is older
- Rough lengths or quantities, or drawings if you have them
- Access details, including height
- The type of building and who uses it
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, ring 01277 525 020 or email the details over.
Also near Offham
Other services in Offham
Keeping the joints sound
Sealant joints are maintenance items, and how long they last depends on how they’re treated. We suggest:
- Stick to the specified sealant rather than a generic substitute
- Share drawings and the specification as soon as possible
- Record the products used in the O&M file
- Brief following trades on areas that have been sealed
A new structure shifts as it loses construction moisture. Flexible sealants in the right joints handle normal movement, but caulk in a joint that moves more than expected may crack. If that happens, let us know.
Sealing outside when the joint is damp or too cold leads to poor adhesion. Holding off until conditions suit avoids callbacks, so we plan external work with that in mind.
Why it’s worth doing now in Offham
Clearing snags piecemeal is tempting when handover is close. A planned sweep of each plot or floor catches the lot in one go, and avoids repeated visits. We can run snagging as its own phase before handover. Older rural buildings around Offham 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, along with the time of year for external work.
Why appoint us
- Coloured sealants to suit the setting, where available
- Clear, fixed quotes
- Old sealant cut out, never sealed over
- Fully insured
See how commercial sealant jobs are priced or how we’re accredited.