Glossary

A

Armouring : A waterproofing needs an armouring in order to prevent viscosity of the bitumen and resist the static and dynamic taxation. Not all armouring has the same resistance characteristics. The most commonly used armouring is made out of glass fabric and glass fiber, non-woven polyester and the component thereof.

Autoprotection : The protection is used to protect the waterproofing against meteorological influences, UV-rays or maintenance circulation. The protective finish is made out of (non)coloured flakes, granules or thin metal foil (alu, copper, inox) manufactured in our factories. Available in different colours to provide the roof with an attractive finish.

C

Composite : An armouring made out of at least 2 different materials.

D

Drainage layer : With a green roof system the drainage layer provides a good circulation of the water under the substrate or earth layer.

E

Elastomeric : See elastomerics

Elastomerics SBS : Developed 30 years ago by adding SBS polymers to make the bitumen elastic. Thanks to this elasticity, the bitumen is very resistent to movement of the support. The bitumen will also have a longer life cycle because the quality is guaranteed over a longer period of time.

F

Fire : Waterproofing materials have to meet the requirements of certain fire safety regulations that are applicable for certain categories of buildings. The requirements concern the fireproofing of the materials (reaction and resistance in case of fire).

Flame torched : Waterproofing is usually applied through means of flame torches with gas. In this case the manufacturer provides the membranes with a plastic protection foil that can be burned off and is destroyed by the use of the flame torch method. Bitumen is then released at the place of the melted foil.

Fully adhered : "The waterproofing is fully adhered to the concrete or insulation.
Full adherence is only possible on a stable surface and requires the use of flexible waterproofing materials"

G

Geotextile : textile products use for geotechnical works

Glass cloth : Flexible armouring on the basis of glass fibres that provide the membrane with a mechanical resistance.

Glue : Glue on the basis of bitumen and solvents, binding agent and adherents, for the fixture of insulation or
waterproofing membranes at ambient temperature.

Greenroof : see garden

Greenroof : Roof with extensive vegetation; slope of 2 to 70%.

H

Hot bitumen : This emulsion is obtained by heating the block bitumen in a melting pot which forms a sticky layer to provide a fully adhered waterproofing. Because of the risk of staining the facade and the level of difficulty of this technique, preference is given the the flame torch method.

I

Inaccessible roof : Only technical staff have access to the roof for maintenance purposes and to check the buildings equipment
The waterproofing towards and around these areas has to be fortified by a foil resistant to taxation because of accidental drops of tools or other accident that may damage the waterproofing.

Inaccessible roof : Only technical staff have access to the roof for maintenance purposes and to check the buildings equipment
The waterproofing towards and around these areas has to be fortified by a foil resistant to taxation because of accidental drops of tools or other accident that may damage the waterproofing.

Indentation : Performance that combines the resistance against static load and dynamic load.

L

Liquid applied waterproofing : In certain cases the use of waterproofing membranes is difficult, delicate or even impossible: balconies, terasses, stairways, moist spaces, cupolas, complex shapes,… These cases require the use of a liquid applied waterproofing system. This procedure is advised when thick layers or overload are not allowed, eg. refurbishment. Liquid applied systems are the sole system that allows walking on it directly, without an extra protective layer. Soprema produces a range of liquid applied products.

M

Maintenance : A sustainable roof requires a regular maintenance: cleaning of moss, plants,…

Mechanical resistance : The power of the foil to resist usage taxation (pedistrians, traffic), bad meteorological conditions, polution, deformations of the direct surface of the waterproofing but also accidental taxations.

Mechanically fixed : The first layer is fixed through mechanical fixture points at an equal distance to one and other. Solely the
overlap are flame torched. The second layer is fully flame torched. The advantage of this technique is the gain in time and the fact that it can be used for the refurbishment of old waterproofing, but also for new construction: the Soprafix system. The quality of the system is largely determined by the peeling resistance of the fixture. It is often used on singly ply systems.

Modified bitumen : This type of bitumen is known for its great resistance to water soaking, but it has to be modified or improved for it to be resistant to fluxuating temperatures, ageing, and to be elastic and flexible under cold temperatures.

Multi ply (system) : A multi layer system for which different layers ar glued are flame torched.

N

Non adhered : Due to risks regarding instability of the surface the waterproofing is separated from the movement of the surface. In this case a layer of non-adhered polyester or glass fabric is applied. A non-adhered layer is only possible with an extra layer to avoid that the waterproofing is ripped open by wind.

Non-woven polyester : Non-woven polyester is a flexible, strong and elastic armouring with an excellent resistance to tensions
endured by a waterproofing membrane. The performance, in particular the resistance to shear failure can be improved by adapting the weight of the polyester (180g or 250g).

O

Oxidated (system) : see oxidated bitumen

Oxydised bitumen : This type of bitumen was launched just after the second World War as a first attempt to improve the bitumen by means of oxidation through blowing in, in order to increase the useful temperature reach.

P

Parking : For roof parkings accessible to lightweight vehicles (en from time to time vans or security vehicles) the waterproofing has to be very resistant to dynamic load. Therefore a bituminous waterproofing with composite or non-woven polyester armouring is often used. The asphalt is applied directly thereafter.

Partially adhered : This technique provides an optimal spread of the residual moisture and accomodates the tension caused by a partial separation of the support. There are different methods of partial adherence, according to the surface type and sort of application.

Pathway : Roofs that are solely accessible for maintenance have to be provided with pathways to gain access to machinery that require a periodical maintenance.

Primer : This coating is needed to prepare all sorts of supports and surfaces. Coatings come in different sorts of quality, to specific characteristics of the system that is used.

PVC : Polyvinylchloride, most commonly known and Polyvalent Plastomeric.

PY : see non-woven polyester

R

Roof accessible to pedestrians : Roof that are accessible have to be executed with an optimal waterproofing; the build up has to be resistant to taxation. An armoured waterproofing with a minimum of non-woven polyester is strongly adviced. The protection can be executed by using floor tiles or concrete tiles. In this case a slope of at least 1% is necessary in order to prevent puddles of water. for rough tiles min. 1,5%.

Roof accessible to vehicles : see parking

Roof garden : A waterproof roof with intensive greenroof system requires a waterproofing with antiroot substance in the bituminous mass.
The norm for this =… the slope can go from 2 up to 10%.

Roof surface : Construction element onto which the waterproofing is applied: carrying floor, shotlayer, insulation or
old waterproofing (in case of repair or refurbishment)

Roof-Consulting : Roof-consulting is the technical support service by Soprema. This service provides you with technical and commercial product assistance from the design phase to the execution of the project on site. For new constructions and refurbishment.

S

SBS : Styrene-Butadene-Styrene see elastomerics SBS

Self-adhesive : Membranes with a self adhesive bitumenlayer. This application is used because of fire safety reasons.

Single ply (system) : This systems is made out of 1 single layer. This technique requires a superior finishing because the joints have to be flawless.

Slope (pitched roofs) : 0 to 2%: no slope; 2 to 5%: flatroof; +5%: pitched roofs.

Support : Horizontal part of the construction: the carrying part of the roof which is capable of supporting an increase in taxation of the roof and distribution over the main carrying structure.
This can be armoured or prestressed concrete. The carrying floor can also be the roof soil which hold the waterproofing and the insulation.

T

Thermal insulation : Most commonly, roofs need to be insulated. The thermal insulation is attached to the surface layer. The waterproofing is carried by the insulation, except for roofs with a upside down build up. The design of the build up is determined by the choice of insulation.

THF : Solvent used solely for PVC membranes

TPO : Thermo Polyolefine

Two layer : The most commonly used system for bitumen. Applied on all sorts of roof types and all slopes, as well as flat roofs. The first layer is attached directly to the support, the second layer is attached in a staggered manner onto the first layer.

U

Underliner : Extra layer to protect the waterproofing against meteorological influences or maintenance traffic.
Exists in two forms: an extra underliner (cementlayer, earth, gravel) or a protection when this underliner (granules or other), is applied directly onto the waterproofing material during production.

Upstands : The upstand is the part of the waterproofing that ensures the connection with the horizontal part of the roof, applied on the outer ends of the roof. The upstands require special attention in order to prevent water from dripping in underneath the waterproofing. The solution for you upstands finishing is Alsan Flashing. A bituminous, liquid applied waterproofing material, applied without the use of a flame torch. it ensures an optimised adherence to the surface and it eliminates the risk of fire.

V

Vapour layer : A screen that prevents water vapour to penetrate into the system build up; the vapour layer is applied underneath the thermal insulation (hot side) and protects it against eventual condensation of water vapour.
Most commonly a bituminous underlayer with aluminium armouring for areas with high humidity grade.

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