66
structural elements
either below the insulation or above as in the case of a conven- tional warm roof. This is because these systems are FLL certi- fied as root resistant so there is no risk of root damage to the integrity of the waterproofing membrane, even as plants mature and their root size increases. Ideally a monolithic system should be used as there will be no seams, laps or joints that roots could attack and penetrate. Consulting the membrane supplier for technical support can help determine the right specification in this regard.
Location, location, location In terms of specification of the green roof planting itself, client preferences and aesthetics have a role to play, but a key consideration should always be the location and prevailing climactic conditions as these govern the amount of light, heat, shade and moisture the roof will receive. The influence of
with any post build ‘settlement’, tough and durable enough to cope with the load bearing requirements of the planting medium and have a sufficiently long service life to make the green roof viable. A common green roof design would typically consist of an
inverted warm roof build up, applying the waterproofing system to the roof substrate, followed by the insulation, and then the green roof elements. This can add an extra layer of protection for the waterproofing membrane as it is cushioned underneath the insulation. Certain waterproofing systems can be applied
Counting on Köster
complicated detailing. Other benefits include resistance to occasional foot traffic, aging, hydrolysis, frost and salt. It also seals against synthetic oils and aliphatic hydrocarbons with high boiling points.
01992 523523
www.deltamembranes.com enq.194 Are you looking for an alternative to lead?
The theft of lead from roofs and other structures is a growing threat to the heritage of the UK’s historic and public buildings. The only true solution to this problem is the replacement of lead with another material that is much less likely to be subject to criminal damage or theft. Unfortunately, many roofing systems fall short of the mark in terms of either appearance or performance. There is one though that meets most, if not all, of the criteria: Topseal’sGRP (Glass Reinforced Plastic) roofing system. Topseal has developed a GRP based simulated lead system that looks authentic and can be specified to complement the colour of existing lead work complete with (seamless) rolled joint detailing. The versatility of the Topseal system ensures that it will fit into almost any style from traditional listed structures to public buildings and modern schools. It has been successfully installed on these types of projects previously and now meets the needs for a modern alternative to lead. Topseal is a BBA certified GRP roofing system with a materials and workmanship guarantee for up to 30 years. The system has been safely installed onto millions of square metres of roofs around the UK by Topseal’s national network of approved installers since 1992. It’s all possible with Topseal.
08000 831 094
www.topseal.co.uk respond online at
www.architectsdatafile.co.uk enq.196
Easy application to the most complex of architec- tural details is promised with Köster 21 – a two- component, solvent-free, multiple use crack bridging waterproofing coating from Delta Membrane Systems. This elastic, crack-bridging waterproofing material offers excellent adhesion to dry and moist substrates and – being liquid applied – it creates a seamless coating around difficult or
surrounding buildings, which can also affect shading levels and exposure to winds also need to be taken into account. These factors should be assessed in combination to determine the via- bility of different types of planting. Of course, no matter how carefully considered the planting
specification, without proper maintenance post installation the green roof will not thrive. Establishing a maintenance plan and provision for the associated costs need to be factored in at the design stage for the aesthetics and benefits of the green roof to last long term.
enq.193 Save money by using Caberwood MDF Pro
Used extensively throughout the building industry for many years, Caberwood MDF Pro from Norbord is a premium grade MDF with a uniform density across the board. It is ideal for creating light joinery applications and is one of the best, most cost-efficient moisture-retardant boards on the market today. The product, has been designed to be easy to saw, drill,
shape and rout without splintering or chipping. It is also designed to look good; it’s ideal for most high quality paint and surface finishes including the application of paper foils and veneers. In addition, Caberwood’s high quality fibres and internal bond strength mean that the product boasts superior screw and fastener compared to other types of panel product.
enq.195
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92