Pitched roof underlays are normally dressed into the eaves gutter, leaving a strip of material exposed. Some underlays, including spun bonded breather membranes and more traditional bituminous felts can deteriorate and even disintegrate after relatively short exposure to water and sunlight.
BRE Defect Action Sheet 9 recommends the use of a more durable material for these exposed areas. Eaves Guard is a highly UV resistant polymeric eaves protection system designed to meet these requirements which will give maintenance-free service for many years.
Eaves Guard is tough and durable but can be trimmed easily with a sharp craft knife: it is designed to span across three rafters at 600mm centres and may be installed either before or after the gutter is fixed.
Underlays dressed into the gutter require a supporting fillet to prevent ponding behind the fascia board. Eaves Guard is a rigid component which requires no fillet, so saving on installation costs.