Capel Waterproofing

Dollis Hill

Paul Jones — Tue, 28 May 2013 14:27:59 +0000

As the basement underground car park, for the new residents, had a larger footprint than the building itself it meant there was a substantial podium deck to be waterproofed.

After various discussions with the client Capel were awarded the contract and the system chosen was the fast cure sprayed liquid DOW Hyperkote. Once the concrete slab was cleaned and prepared (some crack repair was required) the primer was applied. When large areas were ready a spray machine was brought in and the membrane itself sprayed. There was a 500mm upstand at the facade of the building and a 600mm downstand at the edge of the podium (ie down the wall).

Once the areas were sprayed a 6mm drainage board and geotextile sheet were laid over that before the landscaper laid the fill and paving/plants.

Clapham M2

Paul Jones — Tue, 29 Jan 2013 03:09:19 +0000

The waterproofing had to be very flexible and well bonded to the deck but from a practical site perspective also had to be applied very quickly.

There was also the problem of areas having to be done in the depths of winter. Eventually they chose the BASF Coniroof system and Capel as the applicator.

There were various difficult details (many posts fixed to the deck) which were easily waterproofed around with the liquid fast cure spray (cures in 30 seconds) membrane.

The job was completed on time and within budget.

Elver Gardens

Paul Jones — Sat, 29 Oct 2011 03:35:43 +0000

The basement was going to be used as parking for the new block. However, the entire site needed to be ‘live’ as the works proceeded. The flats surrounding the podium were all occupied and several had occupants with additional needs.

Capel won the competitive tender and were awarded the entire works including all civils and waterproofing works. Works were carried out in agreed sections and access was always available for residents. Once the sections were waterproofed (using Capel Waterproofing’s fast cure liquid system) Capel’s civils section moved in and replaced fill/concrete, etc along with all new paving, topsoil, railings, brickwork, etc.

Bethnal Green

Paul Jones — Thu, 29 Sep 2011 03:18:11 +0000

There were four distinctive roofs with varying uses and specifications.

The 9^th floor roof was ‘top of the house’ and not really visible to anyone. So here a functional finish was used, this was achieved by Capel spraying onto the concrete deck and walls and then placing high density insulation over the membrane.Finally a geotextile sheet was laid and then clean round stone was laid as the finish.

The 6th floor was also an inverted roof but in this case allowed access to residents. Here the membrane was sprayed, covered in insulation and then had various finishes placed (such as decking/paving/planting..) on top.

The 4th floor was a green roof, this had no resident access. Here the client went for a DOW sprayed system called Verdiseal which has full BBA certification. Again, as approved applicators, Capel were able to do all of the waterproofing work. Indeed they also did all of the sedum matting (incl various reservoir/drainage boards) to create a truly ‘green roof’.

The 1st floor has resident access and again is sprayed and then the various finishes were added.

From the clients perspective the sprayed membrane was a good technical waterproofing solution (as was the decision to change from a warm sheeted system). For the main contractor it was ideal that one subcontractor could deal with the waterproofing and also all of the finishes.