The Mastic Doctor team standing beside their branded vans outside an office building
Greater London · England

Facade Sealing contractors in Avery Hill

Work needed on a facade joint in Avery Hill? We assess it, carry out the work and guarantee our workmanship for 12 months.

  • Draughts around frames and panels
  • Facade joints cracked through the middle
  • Water coming in around window frames
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
Constructionline member
Fully insured: £5m PL

Facade sealing across Avery Hill

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

How the job changes by surface

Precast concrete panels

Concrete edges can be dusty or weak. Faces are cleaned to sound concrete, and damaged edges are reported before sealing.

Coping and flashing joints

Not every coping or flashing leak is a sealant problem. Where the issue isn’t the sealant, we say so.

About our facade sealing in Avery Hill

External sealing depends on the weather more than most trades. Joints have to be dry and the air and surface temperature within the product’s range, and cold, damp starts can delay work. We build that into the programme and tell you if the forecast changes the plan. If you have failed seals around shopfront and entrance frames and previous reseals run over old sealant, we can put it right, whatever the surface. One point of contact handles commercial sealant work in Avery Hill from the first photos to the final walk-round, for single jobs and planned programmes alike.

The ULEZ covers the whole of Greater London, so contractors’ vehicles on a job in Avery Hill must meet its standards or pay the daily charge. Alongside that, sites usually need booked deliveries and a plan for where materials go.

Every job is signed off with a 12-month guarantee. The promise is simple: if the work we did fails within twelve months, we return to fix it.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
Avery Hill (SE9, DA15, DA16)
Wider area
Greater London
Guarantee
12 months on our workmanship
Price
A fixed quote before we start
Call
01277 525 020
Updated
3 November 2026

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. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. Planning a London job such as one in Avery Hill starts with access: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Give us the hours we can be on site and we will schedule to suit.

  1. We look at the joints, the drawings and the access before pricing.
  2. The old bead is cut away completely, not overlaid.
  3. Joint faces are cleaned to firm, sound material, with primer where the sealant maker specifies it.
  4. Closed-cell rod fixes the depth, and the sealant grips two sides only.
  5. A facade-grade sealant rated for the movement goes in, tooled to a concave profile.
  6. The completed runs are checked with you, then the 12-month guarantee applies.

Before we start on site

  • Point out any areas we must not close
  • Move anything stored against the joints
  • Send your site hours and access windows

Ask for a quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. For smaller jobs, photographs and a description will do.

Ask for a quote

Related advice

Cost factors for facade joints

There’s no standard rate for sealant work, since sites vary so much. What we look at:

  • The product specified
  • Access and working height
  • Quantities, in metres or numbers
  • Joint width, depth and condition

There’s no price list, because the scope varies so much from one building to the next. Call for a quote.

What to include in your enquiry

However big the job, these details speed things up:

  • Approximate linear metres or a joint schedule
  • The site address and postcode
  • Any dates the work must fit around
  • The product your specification calls for

For a fixed quote, give us a call on 01277 525 020 or email drawings and photos with the site address and an outline of the work. Our quote form is another easy route.

Facades, frames and programmes in Avery Hill

As part of Greater London, Avery Hill is inside the ULEZ, which applies to every van on site. Add booked deliveries and tight storage, and the mastic package needs planning with the site team. Several hotels sit less than 2 miles from Avery Hill. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up.

Projects at colleges like Rose Bruford College (1.6 miles south-east of Avery Hill) tend to run to term dates, so the mastic is planned tightly. University estates such as University of Greenwich - Avery Hill (less than half a mile south of Avery Hill) tend to have a rolling programme of new buildings and refurbishments, each with window perimeters and facade joints to seal. Hospital estates such as Eltham Community Hospital, 1 mile to the west of Avery Hill, tend to grow and change in phases, often next to occupied wards, so facade and perimeter sealing has to fit the estates team’s plan.

Avery Hill is about 1 mile north-east of Eltham, in Greater London. Looking for facade sealing in Avery Hill? We can help, as we do across Greater London. Across Greater London, 764 places are covered, Avery Hill among them. Sites around London have their own page, about 8 miles away.

Postcode districts covered here: SE9, DA15 and DA16. For a building on Bexley Road, Glenure Road and Perpins Road or nearby, send details and we will quote for facade joints. Main routes into Avery Hill include the A210. If your building is just outside Avery Hill, we cover Blackfen (1 mile east), Eltham (1 mile south-west), New Eltham (1 mile south), Falconwood (1 mile north-east) and Well Hall (1 mile west). Further afield, our area takes in London (8 miles north-west), City of Westminster (11 miles north-west), Marylebone (11 miles north-west), Kensington (12 miles west), St Pancras (10 miles north-west) and Shoreditch (8 miles north-west).

Around Avery Hill

Around Avery Hill, our work takes us to commercial buildings near Shoulder of Mutton Green and Alderwood Primary School, among other places. Avery Hill’s nearest station is Falconwood station, roughly 0.6 miles north of the centre. Well-known places in the area include Greenwich Castle (3.8 miles north-west) and Metropolitan Police Museum (1.7 miles south-east). Not far away are Summer Hill and The Tarn.

Map of Avery Hill © OpenStreetMap contributors

When something else is needed

Part of a good diagnosis is knowing where sealant stops. We’ll tell you if the real problem is one of these:

  • Movement beyond what any sealant can handle
  • Replacing glass or failed glazing units
  • Render or concrete edges that have broken away

Not sure which it is? You can call the office on 01277 525 020 or send details through our quote form and we’ll tell you honestly.

Where we work in Avery Hill

  • Cladding panel joints
  • Coping and flashing joints
  • Window and door perimeters
  • Shopfront frames
  • Stone and brick facade joints
  • Perimeter joints where frames meet the structure

Common questions from Avery Hill clients

Can you work in a London building with booked loading and goods-lift slots?

Yes, most London buildings have access rules of some kind, and we plan around them. Share the building’s contractor rules and we’ll work to them. We allow for the ULEZ, which covers every borough

Can you work around term dates at a campus such as University of Greenwich - Avery Hill?

Yes. We plan campus work around teaching, exams and residence turnarounds. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.

Are you CHAS accredited?

Yes. Mastic Doctor is CHAS accredited and a Constructionline member, which helps with supplier vetting.

Can you work to our specification?

Yes. Send it with your enquiry, and the quote will be based on it.

When can you be on site?

We are in the office from 8am until 5pm, Monday to Friday. Let us know your site hours and access windows, and the work will be planned around them.

Is it okay to overlay old mastic?

No. A bead run over old sealant soon lifts. We remove the failed sealant, clean the faces, set the depth and reseal.

What will the job cost?

We don’t publish prices, because every site is different. With photos or drawings, we can give you a fixed quote.

Maintenance after handover

For the best life from the joints:

  • Combine resealing with other works that need access
  • Brief window cleaners about newly sealed joints
  • Don’t wait for a second leak before calling
  • Check the asbestos register before old mastic is disturbed

If new signage, brackets or services are fixed through a sealed joint, the seal needs making good. Ask the installer to reseal it properly.

Don’t wait for a full elevation to fail. Small repairs stop small leaks becoming large ones.

For managing agents and facilities managers

For main contractors, we work as the sealant subcontractor. Programme, specification and site rules come first, and our applicators hold CSCS cards.

Housing associations and managing agents often need work done across blocks and communal areas. Work can be phased so residents and staff keep access throughout, with each stage agreed with your site contact.

Accreditations

Trusted. Accredited. Insured.