The advantage of ASTL with 3 types of roofing projects
The most important feature of the ASTL mounting combination is that it is good for bridging large differences in height. As a roofer or contractor, you can probably estimate the greatest benefit you have with this: you need fewer different fasteners in stock. It doesn’t only saves on purchase, it also saves a lot of hassle on the roof, in the 3 following scenarios:
1. With height difference in (tapered) insulation
As a roofer, you can encounter a typical problem when securing the roofing systems on roof floors when having differences in height in the concrete floor slabs..
You work with different heights: 10, 12, 13 and 15 centimetres for example. With a standard combination fastener (grommet with concrete screw) you have a maximum clearance of 1 centimetre. That means that you do need 4 combinations to bridge that slope. You need one combination in one place, and the other in the next. Also, that means a lot of different boxes, large order quantities, and much surplus at the end of a project. Not to mention the inefficient work on the roof, with a constant search for the right combination.
The ASTL automatically secures itself without much effort; you just have to screw in your combination. That way he can control a slope of 11 cm difference, automatically, so you can cover a complete roof (slope) with 1 or 2 ASTL fasteners with different lengths. One ASTL for 130 to 170-millimetre slope insulation and one for 170 to 250 millimetre for example. The longer the combinations, the more slope you can bridge.
This way you always work more efficiently, easier and with less chance of errors in the roof covering when working with height differences in concrete floor slabs. For all your efficient securing.
2. Renovation projects
The ASTL comes in better than the standard combinations. With renovation projects, you often have to deal with significant differences in the existing building thickness. For example; you have an old concrete roof with or without insulation, old bitumen roof layer is on top of that, even overlayed 1 to 2 times, what brings you on 3 to 4 layers of bitumen on top of each other which gives a lot of height difference, to more than 1 cm.
When using a standard combination slope-fastener, you may just miss 1 or 2 centimetres in length of the screw in the overlap.
If you have the ASTL slope-mounting combination that's needed, you're secured, in this case you also need fewer combinations - 1 or 2 combinations will do - you are always at the right depth in the various concrete layers, without the risk of damage.
3. For PREFAB elements
The risk with prefab concrete roofs is the same as with the scenarios as mentioned above. There is always a difference in thickness or height because you fasten such concrete slabs next to each other in one go. In severe cases, there may also be up to 5 centimetres in height between them. As a result of that, the isolation on top also will be misaligned.
These are not the vast differences as with a slope, but it remains a risk on your roof. In our opinion, when it comes to roofing, you have to eliminate all hazards.To prevent this, you better work with the ASTL combination than with a standard combination that cannot bridge these differences (literally and figuratively).