Streat mastic sealing
Planning work on a mastic joint in Streat? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Draughts at frames across a block
- Worn sealant at communal door frames
- A mix of products and colours from past repairs
Need mastic sealing in Streat?
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Maintenance after handover
For the best life from the joints:
- Include mastic in your cyclical inspections
- Protect low-level joints in entrances
- Mention RAMS, insurance or CSCS requirements up front
- Share the asbestos register when you send details
Keep records of when each building was resealed. That makes future programmes easier to plan and gives you a history.
Failed mastic often goes unnoticed until heavy rain finds it. Resealing when cracking first shows avoids water damage and the complaints that come with it.
How we handle mastic sealing in Streat
We diagnose before we prescribe: what has failed, what caused it and whether new sealant will actually solve it. Old mastic is removed entirely, the faces prepared, primer used where the maker specifies it and new sealant tooled in, with backing rod setting the depth where it’s needed. If you have patchy repairs in mismatched sealant and no planned programme for sealant, we can put it right, on balcony and threshold joints, communal kitchens and washrooms and shopfronts below residential blocks alike. A specialist sealant contractor works differently from a general builder: on jobs in Streat, preparation and product choice get the time they need.
Around smaller places like Streat, older walls fitted with newer windows are a familiar sight. The mastic needs to suit an irregular masonry face and the look of the building.
We stand by our work: 12 months, guaranteed. That covers our preparation and application, and if something we did falls short, we return to it.
- Where
- Streat (BN6, BN7)
- Wider area
- East Sussex
- Cover
- 12 months on our workmanship
- Price
- Quoted before any work starts
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Cost factors for mastic joints
There’s no standard rate for sealant work, because every site is different. What we look at:
- The total length or number of joints
- Location, for remote and island sites
- The size and state of each joint
- Whether the work must be split into stages
The price depends on the quantity of joints, how much old material needs removing and how the joints are reached. Call for a quote once you have the details.
Details that help us quote
A few photographs plus some basic facts will normally do. Please tell us:
- The asbestos register, for older buildings
- Specification clauses that apply
- Anything awkward about access or site hours
- Photos of the joints, close up and from further back
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’ll fill any gaps with a visit.
Blocks and managed buildings in Streat
Streat sits in one of the drier corners of the country, the South East. External mastic still waits for dry faces and the right temperature, and elevations facing the sun and the prevailing weather are usually where frame mastic ages first. At about 40 miles from central London, Streat is within reach of the capital. Within reach of London, blocks run by agents and associations are common around stations, and window and balcony mastic on them tends to age at the same rate.
Owners of student blocks near University of Sussex (to the north-east of Streat) can schedule frame and external mastic for the summer vacation. Landlords with units on estates such as Ditchling Common Business Park, 2 miles north of Streat, can bring frame, door and external mastic across several units into one programme.
Streat is about 3 miles south-east of Burgess Hill, in East Sussex. Businesses, contractors and managing agents in Streat can call on us for mastic joints. Streat is one of 308 places in East Sussex on our list. We also cover Brighton, some 6 miles away.
Business premises anywhere in BN6 and BN7 are within our area. Nearby places we also cover include Plumpton (1 mile south-east), Plumpton Green (1 mile north-east), East Chiltington (1 mile east), Ditchling Common (2 miles north) and Chiltington (2 miles east) for mastic joints. A short drive away, we cover Seaford (13 miles south-east), Lewes (5 miles south-east), Hailsham (15 miles east), Crowborough (14 miles north-east), Uckfield (9 miles north-east) and Newhaven (10 miles south-east).
What’s near Streat
For rail, the closest station is Plumpton station, about 1.1 miles north-east of the centre. Nearby you will also find Lewes Victoria Hospital (4.5 miles south-east) and Ditchling Museum of Art + Craft (1.6 miles west). Not far away are Bedelands Farm Nature Reserve and Ditchling Beacon.
Do you need mastic sealing in Streat?
Previous repairs often sealed new mastic over old. New silicone has nothing to grip on old silicone and the repair soon fails.
Site and facilities staff are often the first to spot these:
- No planned programme for sealant
- The same joint failures repeated across a portfolio
- Draught complaints from residents or tenants
- Cracked, hardened mastic round windows on a block
Buildings close to stations like Plumpton station (1.1 miles north-east of Streat) are often flats over shops, with frame mastic to keep sound.
Questions to ask before you book
- Which product they’ll use, and why it suits the joint
- Their plan for phasing and protecting the area
- Their pre-qualification and accreditations
- Do they follow the manufacturer’s priming guidance?
Towns and villages near Streat
More services for Streat
When to bring in a specialist
General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
When it isn’t the sealant
A few problems need another trade or a different fix, and we say so rather than covering them up:
- Broken glass or failed sealed units
- Water coming in from the roof or rainwater goods
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
If you are not sure, just speak to us on 01277 525 020 or email a schedule or drawings and we will give you a straight answer before you book.
Surfaces we seal
- External wall and movement joints
- Communal kitchens and washrooms
- Communal entrances and stairwells
- Window and door perimeters on blocks
- Shopfronts below residential blocks
- Balcony and threshold joints
Common questions from Streat clients
Can you quote for a block close to Plumpton station?
Yes, and several blocks can go on one quote. Photos of each elevation help us quote accurately.
Is Streat off your patch?
No. Small places get the same service as large ones. We work across Greater London and the South East. Where we can, we group nearby jobs to make the most of each trip.
Can people stay in the building while you reseal?
We plan around people living or working in the building. We agree the programme so you can notify occupiers, and entrances stay in use.
Do you supply RAMS and insurance details?
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.
Do you seal on top of existing sealant?
No, never. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.
Do you work with property factors and landlords?
Yes. Managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios are our main clients for this work and work can be quoted per building or as a whole.
How do you choose the sealant?
Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
Diagnose, treat, sign off
Inspect, seal, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then we prepare and seal each joint with the specified product, and we finish with a walk round so the work can be signed off. For work around Streat, we aim to finish in one visit, so photographs and measurements up front really help. That way the right products come on the day.
- Each block or building is walked and the failed joints recorded with the likely cause.
- We send a fixed quote that sets out the joints, the products and the programme.
- The programme is fixed with you, including dates you can pass on to residents or tenants.
- Old sealant is stripped and each face prepared back to firm material.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Completed joints are inspected and carry a 12-month workmanship guarantee.
Preparing the site
- Let us know about inductions and permits
- Let building users know which areas are affected
- Make sure the joints can be reached
Getting a fixed quote
Send us photographs, drawings or a joint schedule and a fixed quote comes back to you. Where a site visit makes more sense, we will arrange one.