Page 4 - MGMA MRM Issue 01 final
P. 4

Sustainable                                         Inspecting and                                                     The debris should be collected using non-            be thoroughly cleaned and de-greased using

                                                                                                                                                                                        an organic solvent such as paint thinners and
                                                                                                                                   metallic tools, such as soft bristled brushes/
            Solutions                                           Maintaining                                                        brooms and PVC shovels.                              the damaged area dried and coated with paint
                                                                                                                                                                                        overlapping the damaged area 100mm all round.
                                                                                                                                   Areas of dirt compaction and any other vegetable
                                                                                                                                                                                        If the white paint coating to the inner gutter lining
                                                                                                                                   matter i.e., soil, twigs, weeds, should be carefully
                                                                Gutter Systems                                                     removed and contaminated areas hosed down            enamel is scratched or damaged, clean using a
                                                                                                                                                                                        non-metallic media. Brush off all contamination
                                                                                                                                   and cleaned with fresh water. In the case of
                                                                                                                                                                                        and loose coating particles and repair by painting
                                                                                                                                   both gravity and siphonic outlets check that
                                                                                                                                   the outlets are clear and re-protect the welds if    with a good quality gloss paint.
            Whichever metal you choose – cast                   Rainwater systems are integral to protecting                       necessary.                                           For repairs to membrane gutters, supplies of
            aluminium, cast iron, fabricated steel or           our buildings and channelling water from roof to                   Lastly, check that the fixings are sound and         membrane patches can be obtained from the
            fabricated aluminium – metal represents             ground. Therefore gutters, outlets and downpipes                   installed to the recommended torque setting;         gutter manufacturer. Prior to use, wash the
            the most sustainable environmentally-               must demonstrate in-situ strength and structural                   if damaged or in need of replacement, contact        damaged area with water and washing up liquid,
            friendly building material. Metal rainwater         capability when handling increasing volumes of                     MGMA for further advice.                             rinse off and dry thoroughly before commencing
            drainage systems contribute significantly           rainfall and wind loadings.                                                                                             any repair work. Where the membrane is badly
            to the sustainable design concept, thanks           Industrial rainwater gutter systems are                            Where repairs are required, ensure that the          scuffed, torn, ripped or damaged exposing the
            to their high recycled content, recyclability       designed to give many years of reliable service                    gutters are clean of debris. In the damaged area,    galvanised metal; heat weld a membrane patch
            and energy efficiency.                                                                                                 dry the surface and remove any loose coating         to an area covering plus 50mm all around the
                                                                but to achieve this, a regular inspection and                      particles of protective paint by gently scraping.
                                                                maintenance programme is essential; indeed,                        Remove any zinc salts or rust on exposed             damaged section (refer to the manufacturer’s
                                                                such a programme is often a mandatory                                                                                   installation instructions).
            MGMA members offer a range of                       requirement of the system guarantees available                     galvanised surface by abrasive cleaning using a      Safety on site is paramount and MGMA
            sustainable rainwater solutions:                                                                                       non-metallic media. Brush off all contamination
                                                                for industrial gutters. Neglected gutters may lead                 and loose coating particles.                         recommends that all inspections and any work
                                                                to premature degradation of the system and                                                                              undertaken on buildings are only carried out by
                                                                prevention is always better than cure - a regular                  Abrade the galvanising and 50-75mm of the            competent persons trained for such a purpose
            Aluminium                                           maintenance programme is the most effective                        protective coating around the damaged area to        and that adequate and appropriate safe access
                                                                way of ensuring that serious problems do not                       produce a sound, flake free surface. Degrease        is always provided. Safety precautions must be
            Aluminium represents a sustainable,                 arise.                                                             thoroughly using solvent wipe. Apply product         taken for the whole duration of inspections and
            environmentally friendly building material;         Coated gutters must be inspected at least                          by stiff bristled brush to bring back protective     works. HSG 33 Health & Safety in Roofwork,
            the life time value of aluminium is high,           annually (more frequently if in coastal/heavy                      coating to the original 150μms thickness             available from the HSE, provides detailed advice
            lasting more than 25 years. Eighty per              industrial areas or near trees) and MGMA                           overlapping the prepared area by 50-75mm             on this subject.
            cent of the aluminium rainwater systems             recommends that the gutter inspection is carried                   to ensure the whole area of treatment is fully       Further advice is available from any MGMA
            already in use in the UK have been                  out at the same time as the roof inspection.                       covered and re-protected.                            member company whose details can be found at
            manufactured from recycled aluminium                Details of the inspection, together with any                       Abrasions and scratches penetrating the    
            and aluminium is 100 per cent infinitely            repair and maintenance work undertaken                             galvanised protection in areas
            recyclable at the end of its life.                  must be recorded in the product guarantee                          not protected should
                                                                The inspection method will vary depending on
            Steel                                               the type of system the gutters are connected
                                                                to; for a gravity drainage system ensure that all
            Galvanised steel represents a sustainable,          pipework is inspected in accordance with BS EN
            environmentally friendly building material          12056-3:2000 and for siphonic drainage systems
            due to its longevity. Galvanised steel can          check that the system (outlets, tailpipes,
            be reused or recycled repeatedly without            horizontal carrier pipes, etc.) is
            losing its qualities as a building material         inspected in accordance with BS
            making it a sustainable choice for low              EN 8490:2007.
            carbon specification projects.
                                                                Any build-up of debris,
                                                                including debris remaining
                                                                after the roof installation for
            Cast iron                                           example, drilling swarf,
                                                                loose fixings, and rivets
            Cast iron is a popular choice for its               should be cleared
            traditional virtues of strength, reliability,       from the gutters
            versatility and sustainability. Cast iron           taking care not to
            rainwater goods are often manufactured              scratch or damage
            from a mix of the following recycled                the protective
            materials, scrap iron, scrap steel                  surface.
            pressings and scrap steel casting.
            The resultant cast iron products are
            themselves 100 per cent recyclable at the
            end of the product’s life cycle.
                                                                                                                                                                               Image reflects well maintained gutters
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