Ponding should not be confused with bird baths which are random and inconsequential amounts of water that remain on a roof after a rainfall.
Ponding vs bird baths on a roof.
Ponding water accelerates the deterioration of many materials including seam adhesives in single ply roof systems steel equipment supports and particularly roofing asphalt.
If you re fixing a dead level roof with ponding issues you may want to consider installing crickets wedge shaped diversion ridges or tapered insulation to redirect water flow.
With the installation of roof slope ponding water can be eliminated from the equation in one quick and easy step.
Roofing and the nrca s definition is the excessive accumulation of water at low lying areas on a roof that remains more than 48 hours after precipitation under conditions conducive to drying.
Table 1 shows the maximum gap that can be expected under a 10 foot straight edge for various floor classifications from conventional to superflat.
Bird houses baths.
Ponding occurs when after a storm or heavy rain water collects in pools on the roof.
As indicated the higher the f number the shallower the birdbath.
Ponding is the typically unwanted pooling of water typically on a flat roof or roadway.
This is particularly true at street intersections where both streets are on a grade and you have curb and gutter.
Low f numbers have more frequent more exaggerated waves which result in deep birdbaths.
Spf spray polyurethane foam roof with ponding water bird baths if your commercial roof has a slope of per foot a 1 12 slope or more has interior drains or an edge mounted gutter does not use scuppers for primary drainage and has no ponding water water that is still present after 48 hr since the last precipitation you have the.
The designer will have spot flowline elevations plainly showing you will have a bird bath on one of the curb returns frequently in a wheel chair ramp.
Interestingly it also comes with a very strong smell of cedar.
Those unsightly bird baths or small areas where water and dirt collect can be filled with roof slope as well leaving your roof to stay as white as the day is was applied.
Where to place a birdbath.
Most birds groom themselves using a oil secreted from a gland by their tail running the oil through every feather.
Although many birds can be seen splashing around in a bird bath or a puddle the most important aspect of a bird bath is it provides the birds with a ready and safe source of clean drinking water.
In fact the number is related to the frequency and depth of the waves shown in figure 1.
The best solar birdbath fountains for 2020.
The roof is designed to slide up the ropes probably to allow easy cleaning and provide proper ventilation surrounding the perimeter.
Now is the time to plan for solving ponding problems.
I have often found bird baths on the plans before costruction.
Some also use ants to pick off mites and dander.
