Obviously there is a limit to the size any "One Piece" sheet can be. Apart from the size considerations there is also the weight issue. There are ocassions when the roof shape makes it impossible to use one piece.

Fortunately the joining system is a very simple but effective solution. Typically a jointing tape is used to provide a strong watertight seal. Over time it becomes as strong as the membrane itself.
Contact adhesive or Decking adhesive CANNOT be used to form a watertight join in EPDM

In thoery EPDM membrane can be laid over existing fibreglass, fibrous cement boards, felt, bitumen and steel roof cladding.

However in practice it is not always a good idea, requiring the use of specialist adhesives and or mechanical fixing.

If unsure please telephone for advice.

Although the expected lifespan of EPDM membrane is in excess of 40 years the actual material guarantee is for 10 years only. (unless otherwise changed in writing by National Roofing)

No special tools are required. Basic hand tools like scissors, paint rollers and disposable paintbrushes are all that is required.

The EPDM sheet supplied can be walked on both during and after installation.However common sense needs to be applied. EPDM is designed to take LIGHT foot trafic for ocassional cleaning or maintenance. Avoid studded boots and shoes. If ladders are going to be used place something under to avoid damage to the roof membrane.

The most common colour available is Black. EPDM is available in white but only in limited quantities from limited sources. National Roofing do not currently stock white EPDM

On a normal extension etc it is advisable to measure the roof area and ADD 300mm to length and width i.e. Roof size 4m x 2m sheet size = 4.3m x 2.3m

Where a flat roof runs into a tiled / slate roof it is advisable to ADD 400mm i.e. Flat roof area 4m x 2m with 4m edge abutting tiled roof. Sheet required 4.4m x 2.3m.

This material is thicker than the "One Piece" EPDM and is suitable for medium foot traffic. It has a textured non slip surface.

This material requires: A heat gun with flat nozzle, silicon / rubber roller for the seams. Penny roller would be useful for detail work, a reasonable pair of scissors and a small craft knife for cutting of the backing paper. Rollers and bruhes for the primer.

National Roofing sell a range of heat guns to suit all budgets. All come complete with required nozzles.

The Self adhesive EPDM is joined and sealed by using a Hot air gun with a flat nozzle to heat weld any joints. This operation also forms the watertight seal for each strip.

The Self Adhesive EPDM is 2.5mm thick and is designed to take medium foot traffic.