Survey and Site visit
We offer free site surveys and a report detailing the problems and issues we have discovered and our recommended solution or solutions to fix and remedy the problem. On delivery of our report and recommendations, a quote will also be attached for your attention.
We deal with all areas of the building envelope and surrounding infrastructure from roof to basements, drains, sewers, manholes, bunds, flood defence, dirty water and potable water systems.
During the site visit we will determine the best access with least disruption to the customer, we will locate the power and water supplies that can be utilised if available or we can plan to bring our own supplies if none are available on site.
We will look at and identify any contaminants and pollution issues, sensitive surroundings, and any activities that may be affected by potential works.
The recommended solution(s) will encompass a detailed Scope of Works, Risk Assessment , Method Statement and Timing Plan . we will document any requirements of the customer / site to enable the work to commence e.g. H&S actions, services isolation, flow isolation, chemical handling, process diversion or redirection and correct disposal of any waste resulting from the operation.
The report, recommendations and quote is then sent to the customer or his representative and if acceptable a Purchase Order will be raised by the customer and timing for the start of works agreed and documented.
As with most jobs, good, thorough preparation is the key to a good job. Our operatives will always go the ‘extra yard’ to ensure the best possible substrate preparation is achieved, we do not, ever, cut corners.
It is often good practice to conduct pull off tests on the substrate to be coated to ensure customer expectations are met and sensible values are established.
Once on site and after any site induction our goal is to minimize any disruption to the customer and his site and to work safely, quickly , efficiently and cleanly to the agreed timing plan.
We have all our own safety equipment, barriers and PPE. All operatives are trained in confined spaces access working, working at heights etc. and are trained in handling any of the equipment and chemicals we may use on site. We will always have our own first aider in the team on site.
During the course of the preparation work if any unforeseen or serious problems with the asset being worked on are encountered we will immediately contact the customer / site manager and agree a course of action to handle this issue.
All the surfaces to be coated are thoroughly cleaned off with a high pressure jet washer, if there is significant grease or oil contamination we may opt to use a hot water / steam cleaner with a degreasing agent.
Any existing coatings will be removed using chemical, mechanical or abrasive blasting techniques. Method chosen will depend on the condition of the substrate and the type of coating involved.
Any infiltration now revealed after cleaning will be treated using a variety of expanding polyurethane grouts and crack sealing resins injected into the substrate. These hydrophobic resins expand behind the substrate to seal off any sources of water infiltration.
Any large voids in the substrate will be filled with epoxy mastic or approved hydraulic cement or Natcem products. Brick substrates will have the mortar joints inspected, raked out where needed and repointed unless the epoxy resin is going to be struck off to fill the raked joints.
New concrete surfaces will be abraded using grit blasting, mechanical grinding or high-pressure water jetting to remove the surface fines and open out the pinholes ready for coating. Brick substrate with glazed or engineering brick will be mechanically abraded or grit blasted to give an optimum key for the coating to bond to.
Once the substrate is prepared and dried off and free from surface water the coating process can commence.
e.g. Epoxy Coating
Warren Ultracoat is a 2 part, high build epoxy system that generally needs no primer coat. Ultracoat is the finest epoxy resin system we have ever encountered. Warren Ultracoat is designed to be sprayed with Environmental’s patented system equipment and has the following advantages. A coating thickness of 6mm can be achieved in a single application without runs or drips;
- 100% solids, no VOCs or solvents.
- Long open time for efficient over coating.
- Excellent cure at lower temperatures.
- Excellent cure and bond at high humidity.
- Will bond to damp substrates
- Long working time relative to cure time.
- Ready to use, no thinning.
- Excellent water and chemical resistance.
Achieve high build thickness and no sagging in one coat / application.
Ultracoat is heated in the Warren patented equipment to enable the epoxy resin to be applied without over pressurizing the system and also to ensure correct stoichiometry for optimum mixing.
Using Graco airless spray equipment the Ultracoat epoxy resin is pumped down heated lines to a static mixing block and then onto the spray gun. Spray coating of the substrate to the specified thickness in one coat is done by skilled, trained applicators resulting in a seamless homogenous coating with excellent bond strength, having excellent chemical resistance and totally waterproof.
Once the coating is hard enough to allow access it is inspected for any missed areas, shadows or voids and is tested for pinholes using a DC holiday detector using settings of 4200 volts per millimeter of coating thickness., e.g. 12,600v for a 3mm coating thickness.
Apply new resin to those areas that need it and retest after curing time elapsed.
Full cure of Ultracoat will be achieved in 48 hours at an ambient temperature of 15 degrees Celsius.