Asphalt Roof Cracking

Problems we have seen with asphalt roof deckings one of the most important things with asphalt is to ensure that it sits on a firm decking.

Asphalt roof cracking.

Block cracking is a series of large typically one foot or more rectangular cracks on an asphalt pavementï s surface. Over time wind roof stresses thermal movement and deck movement aid in a shingle cracking. Whilst an asphalt roof can withstand water sitting upon it probably longer than most types of flat roofs it does ultimately start to damage it. This means that keeping the shingles cool will help slow the loss of volatiles and extend the length of the shingles long term service life.

So if your roof is older and some surface cracks don t completely split or tear through the shingles it s most likely because the shingles are older. Water sitting on asphalt roofs. There are numerous causes of asphalt cracking. Block cracking is typically caused by shrinkage of the asphalt pavement due to temperature cycles.

This can be because the mix was mixed and placed too dry. What you want to look out for is any premature cracking on a newer shingle roof. Proper identification of crack type and cause is vital. It s caused by forces similar to those that create shrinkage cracks in concrete and mud.

Cell sizes can vary in size up to 11 80 inches 300 mm across but are. Loss of volatiles can cause craze cracking. Craze cracking in asphalt shingles is random surface layer cracking. Where there is some movement or poor detailing cracking occurs.

These include harsh weather or climate conditions drainage problems incorrect or poor quality materials and traffic loads. Asphalt used in the manufacture of shingles has compounds that are designed to keep shingles waterproof and flexible. This type of cracking typically covers large areas and may occur in areas where there is no traffic. Fine aggregate mix with low penetration asphalt and absorptive aggregates.

Here are 7 types. Cracking to asphalt roofs. We have found that asphalt tends to work best when sat on a concrete decking whereas if it sits on a timber decking it can have some deflection which leads to cracking and ultimately to dampness getting in the property. Each type of crack has distinct causes.

Defective asphalt shingle products of either organic or fiberglass based shingles may experience several failures including cracking tearing granule loss blistering etc. Block cracking is not load associated but generally caused by shrinkage of the asphalt pavement due to an inability of asphalt binder to expand and contract with temperature cycles. Timely maintenance is critical to keep asphalt conditions from deteriorating further. Splits or cracking in organic asphalt shingles.

Crocodile cracking also called alligator cracking and perhaps misleadingly fatigue cracking is a common type of distress in asphalt pavement the following is more closely related to fatigue cracking which is characterized by interconnecting or interlaced cracking in the asphalt layer resembling the hide of a crocodile. Heat speeds this process because it increases the rate at which volatiles evaporate. Loss of volatiles causes asphalt to dry shrink and crack.