Roof covering installation and assembly
Roof structure is often called “roofing pie” and not without reason – indeed, any rooftop consists of several elements, which, sort of stratifying on each other, create strong safeguard for housing. Each of coating construction’s layers performs its own designated role, whether that be moisture-proofing, noise insulation, or defense against heat loss. During roof’s installation it is important to pay particular attention to the sequence of coats in order to ensure effectiveness of their functions. Basic elements are:
– damp-proof membrane and vapor sealing pellicle;
– warmth-keeping lagging;
– protection against wind;
– roof-boarding material;
– ventilation arrangement;
– other components.
Roof installation implies creation of such a “pie”, which at the final stage is covered with cladding or thatching, and, if necessary, is painted. Material selection to obtain the desired hermeticity and durability is carried out with due regard to climate characteristics, building’s designation and architectural peculiarities, roof’s structure (flat or pitched). In addition, it is important to consider degree of loadings imposed by snow, winding and other atmospheric phenomena.Click here to find out more: Staten Island NY – C&D Staten Island Roofing.
Assembly of flat-deck and inclined roofs, other roofing activities require different approaches, equipment and appropriate knowledge of installers. Let’s take a detailed look at different roofs’ specificities, and focus on such important operational aspects as repairing, maintenance and mounting of rainwater systems.
Features of flat roofs installation
Flat roofs with a slope less than 2.5 degrees are arranged by means of fusion-bonded reel-fed materials or polymeric membranes. These stuffs are designed specifically for terraced-roof option, customized in light of its profile, that gives them maximum protection against weathering, ultraviolet exposure, etc. Assembling rolled materials is accomplished by welding sheets of roll composition roofing using hot air. Various mastics allow achieving waterproof membrane’s perfect impermeability.
Assembly of membranous rooftops is executed by attaching the fabric to roofing’s screed; membrane sheets are fastened between each other by hot-air welding method. Extruded heat retainers, mineral wool rigid insulants and expanded plastics are applied for flat-deck roofs’ winterization. Installation technologies and insulation’s choice is determined by roofing type and loads intensity on it.
Pitch roof installation notes
Pitched roofs with a slope of above 8-12 degrees are covered with different roofing materials, among which the most common are clay roofing shingles, metal tile, profiled sheeting, flexible bituminous shingle and cement-sand tiles. In most cases choice of suitable option id driven by customer’s personal preferences and size of budget allotted for housetop arrangement.
Corrugated sheets and metal shingles are installed by laying on lathing and fastening with special self-drilling screws. Folded covering assembly involves the use of specialized equipment, by which galvanized steel sheets are bonded in seams (single or double). Flexible bitumen tiles are laid on roof’s substructure, which is preliminary necessary to be carefully prepared – cleaned and dried. Mounting versatile bitumen plates is executed overlapping or on self-adhesive tile layer (in certain cases – asphalt coating compound), or by means of nails.