The rolls are cut to fit then unrolled across the roof and smoothed out to avoid air bubbles.
Why do you put rocks on a flat roof.
This is still the case for the primary or base roof.
Ideally the stones are river gravel which has smooth edges and won t cut into the roof when somebody walks around on it.
The weight provided by the gravel is used to anchor down the roof materials therefore using far fewer fasteners to hold the materials to the decking.
While tar and gravel roofing or built up roofing systems have many positive aspects if you live in an area or the roof is in a location where it will receive strong sun exposure hot tar roofs will likely damage the roof s membrane if it is left uncovered or unevenly covered by the gravel.
Rocks are placed on commercial flat roofs for many different reasons if the roof is what is called a ballast roof it is not fastened or adhered down throughout the whole roof.
So all you need to be able to say to your roof contractor is you want an epdm rubber roof.
Why do they put gravel on flat roofs.
The purpose of gravel on a flat roof.
When you should not choose a tar gravel roof.
Avoid applying coating to roofs that need repairs fix these first.
These roofs are installed as thin sheet materials 0 030 30 mils to 0 060 inches 60 mils thick and are applied to the roof in a single layer.
On many flat roof low slope commercial buildings it s common to see gravel on top of the roof.
I assume you re not talking about rocks meaning boulders but rather the layer of small stones you see not just on gas stations but on many flat roofs.
Have you ever wondered why contractors install gravel on flat roofs.
The rolls are applied to a completely cleaned stripped roof deck that has been coated in adhesive.
For many years the only way you could cover a flat roof was with rolled rubber roofing.
This is costly and guaranteed to fail unless surface has been filled and smoothed.
Specifically there are two main reasons to use a ballasted roof system.
The membrane is.
Both factors can extend the life of your flat roof.
The gravel can be applied in far less time than using a specially.
