Day/Month/Year

Day/Month/Year

Dear Mr/Mrs______

It is important to note that these suggestions are based on a visual inspections and no core samples were taken. The specification does not constitute a very thorough inspection of non roofing elements.

or

It is important to note that these suggestions are based on a visual inspections and core samples were taken to establish the roof build up.. The specification does not constitute a very thorough inspection of non roofing elements.

The specification is based on Envirotech EVA Single Ply membrane with its high tensile polyester reinforcement which gives it exceptional puncture; tear and wind uplift resistance, combined with the highest level of durability and longevity.

and/or

Envirotech EVA is a unique callendered EVA roofing membrane and its flexibility is achieved by the use of DuPont’s Elvaloy KEE (keystone ethylene ester) ethylene interpolymer. This is a solid phase modifier which is integral to the membrane. Elvaloy cannot migrate over time therefore the membrane maintains its flexibility, durability and reliable performance for many years. Heat welded seams form the strongest possible laps.

and/or

Envirotech EVA membrane offer excellent chemical resistance which has led their use on airports, industrial plants.

and/or

Envirotech is fully compatible with bitumen and Asphalt and has been used extensively on refurbishment and overlay projects

and/or

Envirotech EVA has been manufactured for almost 20 years in some of the toughest climates in the world. The membrane systems are resistant to heavy rain temperature extremes and have outstanding wind resistant properties

and/or

Envirotech EVA contains no volatile organic compounds (VOC’s) which can leach out of some traditional PVC’s making Envirotech EVA more environmentally friendly.

and/or

Seams are welded by hot air which is recognised as the strongest,fastest and most reliable seaming method in the flat roofing industry. The seam when fused together becomes stronger than the membrane itself.

We take this opportunity to enclose a copy of our “suggested maintenance schedule for Envirotech EVA single ply systems”.

Yours sincerely

PROPOSED SPECIFICATION

ENVIROTECH EVA SINGLE PLY MEMBRANE

REFURBISHMENT

FLEECE BACKED FULLY ADHEARED STRIP OFF WITH OUT ANY NEW INSULATION

LIST OF CONTENTS

1Condition Report on ProjectYES/NO

2Report PhotographsYES/NO

3SpecificationYES

4Additional SketchesYES/NO

5Condensation Analysis ReportYES/NO

6Specimen WarrantyYES/NO

7Maintenance ScheduleYES

8Approved Contractors ListYES/NO

9COSHH InformationAvailable on request

10CDM Health & Safety AssessmentAvailable on request

11NBS Format Specification – Hard CopyAvailable on request

12NBS Format Specification – Floppy DiscAvailable on request

13Additional LiteratureYES/NO

CONDITION REPORT

Site Inspection date ------

This report and its recommendations are based upon the results of those core samples and upon a detailed visual inspection.

or

This report and its recommendations are based upon the results of a detailed visual inspection.

This roof area is approximately xxx square meters in size.

Photos are attached to the back of the report for reference.

Core sample results

Xxxxx

The roof is generally in a poor condition and the existing waterproofing is to be stripped off and replaced with Envirotech EVA waterproofing layer.

Any further relevant information on the condition of the roof to be inserted here.

SUGGESTED SPECIFICATION

ENVIROTECH SPECIFICATION

PREPARATION:

Remove all off the existing waterproofing from the existing deck. All areas must be completely cleared of debris and nails etc in preparation for the installation of the new insulation and Single Ply Fleece Backed Membrane.

and/or

Remove the bottom two courses of slates/tiles from the adjacent pitched roof to allow the membrane to be taken up under the slates/tiles adequately.

and/or

Any area of deck requiring replacement to be removed and replaced with Plywood deck minimum of 18mm thick to BS5268: Part 2 and BS EN636: Part 3 plywood specification requirements for plywood for exterior use.

VAPOUR CONTROL:

None required

WATERPROOFING TO MAIN HORIZONTAL AREAS:

Install EnvirotechEVA 1.2mm mediumgrey fleece backed single ply membrane (20 x 1.93m) fully bonded in Envirobond fleece adhesive F200 with heat welded laps.

Minimum overlap to be 70mm, with a minimum of 40mm fully heat welded joint.

DETAILING:

Fully adhere Envirotech EVA flashing piece to existing up stands in Envirobond SG500, overlapping horizontal membrane by a minimum of 70mm, with a minimum 40mm fully heat welded joint. Terminate with a termination barattached at 200mm centres along the top of the membraneand seal with lead mate sealant placed behind the metal bar before tightening. Seal top of lead flashing with mortar or lead mate sealant.

or

Fully adhere Envirotech EVA flashing piece to existing up stands in Envirobond SG500, overlapping horizontal membrane by a minimum of 70mm, with a minimum 40mm fully heat welded joint.

Terminate with a termination bar mechanically attached at 200mm centres along the top of the membrane and seal with lead mate sealant placed behind the metal bar before tightening. Cut new chase/raggle to vertical face and insert lead flashing piece. Seal top of lead flashing with mortar or lead mate sealant.

or

Cut new chase/raggle to vertical face, insert Envirotech EVA raggle trim. Fix raggle trim by using clad metal cleats.Fully adhere Envirotech EVA flashing piece to existing up stands in Envirobond SG500, overlapping horizontal membrane by a

SUGGESTED SPECIFICATION: Continued

minimum of 70mm, with a minimum 40mm fully heat welded joint. Seal top of raggle trim with lead mate sealant

and/or

Mechanically fasten the top of Envirotech EVA flashing sheet and fold existing felt or breather membrane over the top of the Envirotech EVA flashing. Refit slates/tiles upon completion.

Perimeter details to be formed in grey clad metal in accordance with working drawings.

and/or

Fix 75mm clad metal drip edge to the perimeter detail. Clad metal trims to be fixed using min 40mm screw at 300mm centres. Clad metal to be butt jointed and welded together using 150mm wide seam strap. All corners of clad metal to be welded together using unreiforced membrane.

and/or

Fix 100mm clad metal drip edge to the perimeter detail. Clad metal trims to be fixed using min 40mm screw at 300mm centres. Clad metal to be butt jointed and welded

together using 150mm wide seam strap. All corners of clad metal to be welded together using unreiforced membrane.

and/or

Fix clad metal edge check to the perimeter/verge. Clad metal trims to be fixed using min 40mm screw at 300mm centres. Clad metal to be butt jointed and welded together using 150mm wide seam strap. All corners of clad metal to be welded together using unreiforced membrane.

All detail work to be a minimum of 150mm in height from finished level of roof (including any covering), and executed in accordance with manufacturer’s fixing instructions.

Waterproofing to pipes/vents to be formed with Envirotech EVA medium grey pipe boots, with heat welded flanges, and collars secured with stainless steel clamps and lead mate sealant.

For any intricate areas of detailing use Envirotech EVA Unreinforced membrane

Where applicable should the up stand exceed 1m in height fix membrane with an extra row of fixings and cover with Envirotech’s seam strap (20m x 150mm).

Clean all contaminated edges (upper and lower) with Envirotech EP SC300 seam cleaner, prior to heat welding overlap.

and

To designated walkway areas, install Envirotech reinforced walkway (910mm wide x 3mm, supplied in 18 metre lengths) by welding edge lap directly to the Envirotech EVA membrane surface.

SUGGESTED SPECIFICATION: Continued

**************

GENERAL CLAUSES

The work shall be executed by an Envirotech EVA Accredited Contractor (in accordance with the Envirotech EVA fixing instructions), who shall issue the Envirotech EVA 15 year product warranty upon satisfactory completion of the works.

The Envirotech EVA Accredited Contractor shall issue a workmanship warranty upon completion of the works.

These proposals relate to the roof waterproofing area only. They do not include associated work to be carried out by other trades, which may be required to complete to a satisfactory standard.

All Envirotech materials must arrive on site bearing the Envirotech wrapper or banding tape and relevant reference numbers and coding. Provision must be made on site for adequate, secure and dry storage.

Approved contractors are advised to visit site when deemed necessary and make themselves fully acquainted with the extent of the works and the conditions under which they are to be executed.

ACCESSORIES IF REQUIRED:

Envirotech EVA Clad Metal 75 drip edge

and/or

Envirotech EVA Clad Metal 100 drip edge

and/or

Envirotech EVA Clad Metal edge check

and/or

Envirotech EVA Clad Metal raggle trim

and/or

Envirotech EVA Pipe Boots: Large

and/or

Envirotech EVA Pipe Boots: Small

and/or

Envirotech EVA Clad Metal 75 drip edge

and/or

Envirotech EVA Clad Metal 75 drip edge

and/or

Envirotech EVA Internal and External Corners

and/or

Envirotech Termination bar

MAINTENANCE SCHEDULE

ISSUE DATE xxxxxx

SUGGESTED MAINTENANCE SCHEDULE FOR

ENVIROTECH EVA WATERPROOFING SYSTEMS

GENERALLY, WE WOULD RECOMMEND THAT A FLAT ROOF BE INSPECTED AT A MINIMUM FREQUENCY OF TWICE A YEAR – IDEALLY JUST BEFORE AND JUST AFTER WINTER.

INTERNALLY:

√Check visually for any signs of condensation, presence of moisture or leakage (e.g. wet patches, stains etc.)

EXTERNALLY:

√Check visually for any loosened flashings at perimeters and penetrations.

√Check exposed membrane for any signs of mechanical or chemical damage.

√Remove any unnecessary debris from the roof area (especially objects which could cause damage to the membrane).

√Remove any blockages to outlet gratings/drainage points/gutters (e.g. leaves, litter and sediment).

√Visually check exposed membrane laps for secure ness.

√Inspect rooflights and other penetrations for any damage (e.g. cracks to glazing, missing vent tops), which could result in leakage or condensation.

√Check exposed membrane for any stress damage (e.g. patent glazing, parapet walls etc).

√Keep records of your bi-annual inspections for future reference.

SPILLAGE:

√Envirotech EVA roofing membrane has excellent resistance to a wide range of chemical substances. It is, however, advisable to minimise spillage of even non hazardous chemicals in order to maintain the aesthetics of the roof, and avoid the accumulation of foreign objects/substances. In the event of spillage/contamination of any kind, please consult Interloc Technical Services for instructions/advice.

LOADING:

√Envirotech EVA is designed to withstand the levels of foot traffic associated with regular roof maintenance. If any point loads (such as ladders) are exerted on the roof, they should be spread using a flat protection board. Where loads may exceed these, please contact Interloc Technical Services for specific advice.

If it is found that remedial or maintenance work is thought necessary please contact the roofing contractor and/or Technical Manager for your area. Where the work has been warranted always check with Interloc Building Solutions that the proposed remedial work would not invalidate the warranty.

SCHEDULE OF MATERIALS (WATERPROOFING ONLY)

MAIN HORIZONTAL ROOF AREA:

a)Envirotech EVA 1.2mm medium grey fleece backed single ply membrane.

ENV-02-20-10 full roll 20m x 1.93m = 38.6 m2

b)Envirotech EVA envirobond fleece adhesive.

ENV-10-00-20 envirobond F200 17kg 5 m2/kg

UPSTAND AREAS:

a)Envirotech EVA 1.2mm mediumgrey standard membrane.

EVA-01-20-20 half roll 20m x 0.99m = 19.8m2

b)Envirotech EVA envirobond STD adhesive.

ENV-10-00-01 envirobond SG500 5 LTR

ACCESSORIES:

1)ENV-01-20-30Seam strap 20m x 0.15m = 20 LMT

2)ENV-04-20-10Unreinforced membrane (1.9mm)

20m x 0.56m = 11.2 m2

3)ENV-04-20-20Pipe boot medium grey small 25-100mm

4)ENV-04-20-25Pipe boot medium grey large 100-200mm

5)ENV-04-20-30Internal corner medium grey

6)ENV-04-20-35External corner medium grey

7)EVA-10-00-55Envirotech termination bar 3l/m

8)ENV-05-20-10EVA clad metal drip edge 75mmx80mmx2lm

9)ENV-05-20-15EVA clad metal drip edge 100mmx90mmx2lm

10)ENV-05-20-20EVA clad metal edge check 100mmx55x30x2lm

11)ENV-05-20-18EVA Raggle trim 60mmx30mm

12)ENV-06-20-01Envirotech EVA Walkway

WJ-ENV2304

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