Purley mastic sealing
Mastic sealing for building owners, managing agents and housing associations in Purley. CHAS accredited and fully insured, with a 12-month guarantee.
- Window mastic that has split and shrunk
- Open joints in brickwork or panels
- Worn sealant at communal door frames
Need mastic sealing in Purley?
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Different surfaces, different methods
Planned maintenance
Resealing can be scheduled alongside other planned works, building by building.
Estate-wide resealing programmes
An estate of similar buildings suits a rolling programme. We quote building by building and work through them in turn.
Mastic sealing for commercial buildings in Purley
Blocks are lived in, so access and disruption have to be thought through. The sequence, the areas and the dates are settled with you so you can let residents know what is happening. Entrances and stairwells are kept in use while we work. Most enquiries involve patchy repairs in mismatched sealant and estate-wide sealant that is simply worn out, on communal kitchens and washrooms, shopfronts below residential blocks and balcony and threshold joints. Whoever orders the work in Purley, the brief is usually the same: a clear scope, tidy work and joints that don’t fail again.
Planning mastic work on a London block means notices to residents, access to flats and agreed working areas. We work to the agent’s notice and access plan, so residents know what’s happening.
Building owners and contractors get the same cover: a 12-month guarantee on our workmanship. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.
- Where
- Purley (CR8, CR2, CR5)
- Wider area
- Greater London
- Cover
- 12 months on every job
- Quotes
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
Places near Purley
What else we do in Purley
Questions we are asked in Purley
Will you take on a block within reach of Purley station?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Send the address, photographs of the elevations and your access arrangements, and we will give a fixed quote.
Can you cope with the access rules in a London building?
Yes, most London buildings have access rules of some kind, and we plan around them. Share the building’s contractor rules and we will work to them.
Do you work with property factors and landlords?
Yes, block and estate work is a core part of what we do. We work through buildings in a planned order so you can plan around it.
Is asbestos a concern with old mastic?
We don’t remove asbestos-containing materials. Anything suspect is tested before we carry on in line with the dutyholder’s asbestos management.
Will residents or tenants be disturbed?
Residents and tenants carry on as normal. We flag any areas that need internal access well before the dates so it can be arranged.
Is mastic sealing guaranteed?
Our workmanship carries a 12-month guarantee and we hold public liability insurance.
How do you reach windows on upper floors?
It depends on the building. We agree access with you at quote stage so there are no surprises.
What sealant work can’t fix
Part of a good diagnosis is knowing where sealant stops. We will tell you if the real problem is one of these:
- Leaks through the frame itself rather than the perimeter
- Roof leaks, gutters or failed flashings that aren’t sealant joints
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
Not sure which it is? You can call 01277 525 020 or email us and we’ll tell you honestly before you book.
Surfaces we seal
- External wall and movement joints
- Communal kitchens and washrooms
- Shopfronts below residential blocks
- Balcony and threshold joints
- Window and door perimeters on blocks
- Communal entrances and stairwells
From enquiry to 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. Then we strip out anything that has failed, prepare every joint and seal it. All of Greater London is in the ULEZ, and kerbside space in Purley can be scarce. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- First comes a look at the joints and, for older buildings, the asbestos records.
- A fixed quote covers the joints, products and order of work.
- Failed mastic is removed completely.
- Joint faces are cleaned, backed and resealed.
- We finish each building before moving to the next.
Preparing the site
- Arrange parking or a loading space
- Let building users know which areas are affected
- Point out any areas we must not close
Request a quote
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To ask for one, give us a call on 01277 525 020 or email a schedule or drawings.
Advice
Why act early in Purley
Piecemeal repairs over the years often leave mismatched sealant. Resealing a whole building gives a consistent finish. Failed sealant in a building in Purley can quickly affect neighbours, tenants or the floor below. Putting it right early is less disruptive than dealing with the consequences.
Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote and we’ll put a fixed figure on it.
Why us?
- Constructionline member for supplier checks
- Colour agreed before work starts
- CSCS-carded applicators
- Sealing commercial buildings since 2005
Take a look at how commercial sealant jobs are priced and how we’re accredited.
When to bring in a specialist
Certain joints really need a specialist: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.
Redoing a failed joint typically costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.
Looking after buildings in and around Purley
Blocks in London are typically run by managing agents, landlords or housing associations, with residents to notify and access to arrange. Our programme follows the access you agree with residents. The 2 miles around Purley include 10 care or nursing homes. Owners of care premises can bring window and door mastic into a phased programme planned around the home.
Site managers at schools like Christ Church CofE Primary School (Purley) can fit frame mastic into the summer works. If you own or manage units on a site such as Ullswater Industrial Estate (1.4 miles south-west of Purley), failed mastic on frames, door surrounds and external joints can be dealt with unit by unit.
Purley is about 2 miles south-west of Croydon, in Greater London. Any commercial site in Purley is covered, for single jobs and planned programmes alike. 764 places across Greater London fall within our area, Purley among them. We also cover London, some 11 miles away.
We cover the CR8, CR2 and CR5 postcode districts for mastic joints. Streets here include High Street, Church Road and Brighton Road. With the A2022 nearby, Purley is straightforward for us to reach. We also cover Peaks Hill (1 mile north-west), Woodcote (1 mile west), Russell Hill (1 mile north), Roundshaw (1 mile north-west) and Woodcote Green (1 mile west). Bigger towns within reach include London (11 miles north), City of Westminster (12 miles north), Marylebone (13 miles north), Kensington (12 miles north), St Pancras (13 miles north) and Shoreditch (13 miles north).
What’s near Purley
Around Purley, our work takes us to commercial buildings near The Jolly Farmers pub, Laleham Lea School and Thomas More Catholic School, among other places. There’s a railway station in Purley itself: Purley station. Well-known places in the area include Purley War Memorial Hospital (less than half a mile north-east) and St George's Walk (2.7 miles north). Green spaces nearby include Duppas Hill and Foxley Wood.
When to call us in Purley
Many failed joints were sealed without backing rod, so the mastic is glued to the joint bottom too. It can’t stretch properly and it tears.
Typical triggers for a call:
- Communal area joints that look neglected
- Old repairs sealed over failed mastic
- Repeated reactive repairs to the same buildings
- Movement joints with sealant missing
With historic buildings such as Addington Palace, 3.6 miles north-east of Purley, in the wider area, owners of older properties around Purley should expect mastic to need a product that suits old masonry.
Before you book anyone
- Whether their applicators hold CSCS cards
- How long is the guarantee, and what does it include?
- How the joint faces will be prepared and primed
- Proof of insurance