Such walls are termed “bearing/shear walls.” The wind forces imposed on the walls act perpendicularly to the face (plane) of the walls. … Typical insulating roof deck form planks manufactured in North America and designed for cast-in-place reinforced concrete roof decks.
What is a concrete roof deck?
Structural Concrete Deck – A cast-in-place concrete deck serves as an integral part of the structure and is designed to carry heavy loads. … Beneath the roof cover, structural concrete roof decks are commonly topside insulated using adhered insulation panels or cast-in-place lightweight insulating concrete.
How thick is a concrete roof deck?
Dimensionally, a concrete deck is typically thicker with a minimum thickness of 3 1/2” accounting for the roof deck and concrete thickness over the top. Steel deck can be up to 2 1/4” thick for a roof deck/Resindek® system or as little as 1/4” thick with a floor plate system.
What is a concrete fill roof?
Roof Fill Material is for exterior application and used for lightweight insulating concrete deck construction and replacement. Roof Fill Material is to be applied when the outside temperatures are 40 degrees or above for the first 24 hours after application.
Are concrete roofs good for hurricanes?
Concrete and clay tile roofing resists hurricane-force winds. Natural air ventilation under the tile created by its high porosity and installation techniques used help to relieve wind stress.
How do you waterproof a concrete roof deck?
When waterproofing concrete, a topical sealer is applied to the surface of the concrete. The sealer is impermeable (provided it is applied correctly) and forms a waterproof membrane around the concrete, preventing moisture from entering the concrete.
How long does a poured concrete roof last?
This strength contributes to their long lifespan. In fact, if the concrete roof is properly installed and regular maintenance is provided, the roof can last the lifetime of the home. Most manufacturers even offer a warranty for concrete roofing that can last as long as 50 years.
What is the minimum thickness of roof slab?
The minimum thickness of a slab is not less than 4 inch according to the indian standard. But, the thickness is mostly depend upon the design load and the span. Other than that, the concrete mix grade and grade of Steel is also an important factor to the thickness of slab.
What is the ratio of roof concrete?
Generally, concrete mix ratio 1: 2: 4, 1: 1.5: 3 or 1: 1: 2 (Cement, Sand and aggregate) used for roof slab construction, but safest best concrete mix ratio for roof slab used is 1: 1.5: 3 (Cement, Sand and aggregate), in which one part is cement, 1.5 part is sand and 3 part is aggregate.
Can roofs be flat?
A flat roof is a roof which is almost level in contrast to the many types of sloped roofs. The slope of a roof is properly known as its pitch and flat roofs have up to approximately 10°. Flat roofs are an ancient form mostly used in arid climates and allow the roof space to be used as a living space or a living roof.
Should flat roofs have puddles?
On a performing flat roof ponding water is not a problem as it will drain, or even evaporate, away. However when your flat roof has uneven areas due to sagging, an insufficient slope, or drainage issues, the ponding water doesn’t dissipate.
How do I stop my flat roof from ponding?
The first is through the roof scuppers which are collector heads leading to downspouts. The second is through sloping towards a gutter system that guides the water away from the roof. The third is through roof drains. By maintaining roof drains and gutter systems clean, water should flow out and avoid ponding.
What is roof level?
Roof level means the lowest point of intersection between the plane of the roof and the plane of the exterior.
What kind of roof is best for hurricane?
It is best to protect your home with a metal roof when it comes to hurricane preparedness. Metal roofs are built to withstand winds of up to 160mph. Plus, it won’t blow away in pieces that become potential projectiles, which is what shingles do when they come loose.
What roof pitch is 30 degrees?
What roof pitch is 30 degrees? A 30° roof pitch is roughly the same as a 7/12 roof pitch. To convert from degrees to the American ratio: Find the tangent of the angle, tan(angle).
Is a flat roof better in a hurricane?
Although flat roofs are more likely to resist damage in the face of hurricane-strength winds, they can still experience damage, especially along the corners and perimeter edges where wind pressure can cause uplift. (Traditional slated roofs are more likely to experience shingle damage and blow off.)