INDUSTRY STANDARDS
All Harcon valley troughs exceed the requirements of Industry Standards as defined in NFRC technical bulletin 28:’Use of Inclined Preformed GRP Valley Troughs’.
Tile Roof With Valley Trough
PRODUCT GUIDE
D-Valleys
Universal Harcon valley troughs for use with interlocking tiles ,meeting all requirements for standard valley troughs in NFRC Technical Bulletin 28. Also suitable for use with both natural and man made slates. Both standard (type:HD) and heavy duty (type:DX). They incorporate sanded strips (min. width 35mm) for the mortar to bond to.
A-Valleys
Universal Harcon valley troughs for use with interlocking tiles in limited applications. Meeting all the requirements for 'standard' double lap valley troughs in NFRC Technical Bulletin 28. Also suitable for use with both natural and man made slates. Both standard (type:HA) and heavy duty (type:AX). They incorporate sanded strips (min. width 35mm) for the mortar to bond to.
B-Valleys
Standard Harcon valley troughs for use with slates and double lap tiles, which are dry bedded. Meeting all the requirements for 'standard' double lap valley troughs in NFRC Technical Bulletin 28. Both standard (type:HB) and heavy duty (type:BX).
Unequal Pitches
B & D-valleys are designed for use where the differential between two rafter pitches is 150 or less. Industry standards recommend A-valleys should only be used for pitch differences of 100 or less.
Diamond 60
Heavy weight type B or D valleys with the addition of fluoride based patented surface protection. Provides complete protection against UV light, resistant to virtually all chemicals, solvents and pollutants, temperature range -400 to +1000. The durability of Diamond 60 has been recognised as matching code 7 lead by Housing Association Property Mutual (HAPM). Designed for very harsh environments or for prestige buildings.
