Metal tile — one of the most reliable roofing materials, differing in durability and ease. Mounting of metal tile is rather simple, and if desired it can be executed the hands.
Material selection
Before starting independent performance of work, it is necessary to decide on type of metal tile which in the best way will be suitable for specific weather conditions and will suit the owner of the house at the price.
Protective properties of this material in many respects depend on structure and quality of its covering. The market of building materials gives to buyers opportunity to choose the metal tile having the following types of protecting covers:
- Polyester — type of covering which it is possible to call universal: it perfectly maintains temperature differences, is corrosion resistant and can be applied in any climatic zone; the cost of such metal tile is on average price segment.
- Opaque polyester has attractive exterior, possesses in the saturated natural color, perfectly transfers high temperatures, and here cooling is lower minus 10 degrees for it are undesirable therefore it is reasonable to use it in the area with warm climate.
- Postizol — material of the previous generation of roofing metaltile coverings. It well resists to corrosion, does not change properties under the influence of ultraviolet and costs rather not much.
- Granite crumb — protecting cover which part polyurethane and particles of granite is. It will provide excellent resistance of metal tile to mechanical and temperature influences, influence of UV beams, however its cost is rather high.
- Covering aluminum and zinc — one of the oldest and checked ways of protection. Inexpensive at the price, it allows to protect reliably metalloserepitsa from external influences and to provide it long life cycle.
- Polyurethane will give to material noise-insulating properties that is especially relevant for houses with the inhabited mansard floor.
Rules of work with metal tile
It is simple to work with this roofing material, following certain rules.
Cutting of sheets of metal tile is made
- hand power saw with hard-alloy teeths;
- electric or professional manual scissors;
- vysechny scissors on metal which for convenience of cutting are right and left.
It is impossible to cut metal tile abrasive disk (Bulgarian) categorically since it automatically leads to damage of protective layer and removal of guarantees for life cycle of roofing covering.
The swarf and garbage need to be deleted accurately from sheets of metal tile with dry soft brush. The resulted movements of sheets of scratch of polymeric covering can be tinted slightly special spray paint.
Raising of sheets on roof is carried out by means of guides from two boards. It is forbidden to stand under flashing sheet during its rise. As ready sheets during their rise on roof are subject to danger of movement at sharp wind gust, it is forbidden to carry out their rise on rope.
Creation hydro- and paroizolyatsionny layer
Correctly mounted hydro- and paroizolyatsionny layer is important for ensuring ventilation of subroofing space.
The Paroizolyatsionny film is used for prevention of penetration of water vapor from internal space of the house in thermal insulation and keeps within directly on heater with observance of the following conditions:
- The film fastens to framework metal brackets by means of the stapler or galvanized nails with wide hat.
- All overlaps and also places of contact of film with the acting structural components, ventilation and smoke pipes, antennas need to be glued hermetically by means of the bilateral self-gluing adhesive tape. Chimneys before to them to paste film, it is necessary to isolate heater.
- Over film to framework counterfurring rails are beaten. On them the interior finish fastens. When using vapor barrier with aluminum layer between film of vapor barrier and interior finish it is necessary to leave gap not less than 20 mm.
As thermal insulation material for cattle roof it is recommended to use heaters on the basis of fiber glass and basalt fiber. Laying of thermal insulation is made continuously vrazbezhka of ranks with alternation of the layers laid up and down to avoid formation of bridges of cold.
As waterproofing under metaltile roof it is recommended to use diffusive membranes. Their laying is made as follows:
- The waterproofing film is spread along eaves with overlap of ranks about 150 mm and attached to rafters by brackets of the construction stapler.
- Over film along rafters counterfurring bars with the section 50 x 40 mm are beaten.
- Cross levels of counterfurring fasten over longitudinal with the step corresponding to metal tile step. As furring it is recommended to use eaves board 20-40 mm thick, or bar with a section of 50 x 50 mm.
Ensuring additional protection of subroofing space
To protect bottom edge of furring from impact of atmospheric precipitation, the eaves level drip is applied. It fastens to furring self-tapping screws or galvanized nails in chessboard order through each 300 mm. Overlap of levels longwise — 100 mm.
For protection of subroofing space against birds and insects and also for protection of heater against aeration along eaves to rafters the mesh ventilating tape fastens. For the same purpose after mounting of hood molds on extreme number of furring fix comb.
Mounting of the main area of slope of roof
It is possible to cover rectangular slope with sheets both from right to left, and from left to right, beginning from the right angle formed by lines of eaves and pediments. The longitudinal lock of wave of each flashing sheet has to be spread with the subsequent leaf. Sheets of metal tile fasten to furring special galvanized self-tapping screws with the self-drilling tip and seal washer from EPDM rubber.
Sheets of metal tile have to be leveled strictly horizontally in the area of eaves with overhang of 50 mm for eaves furring.
By means of the screw driver the self-tapping screws need to be twisted in grid strictly vertically in wave deflection, in places of adherence to furring, most close to cross step of leaf of metal tile.
It is recommended to krovit horizontal slope according to the following scheme: at first to put three leaves of metal tile — 2 below and one over right lower. Sheets are leveled on slope, and then are fixed. The subsequent sheets keep within, leveled and fixed the same way. The flooring of ranks is carried out by cascade.
Edge and wind levels fasten to edge board from below up with overlap longwise of 100 mm and step of fastening of 350 mm.
Laying of metal tile on the valley gutter
In valley gutters and places of adjunction of roof to wall and also in areas of the subsequent arrangement of snegozaderzhatel, around flues, dormer-windows, in continuous furring is carried out from board or additional bars.
In the internal corners formed by two slopes in valley gutters on continuous furring from board valley gutter levels on both sides fasten. It becomes by means of metal brackets with step of 300 mm. The overlap of levels of the valley gutter longwise also has to make 300 mm. At the edges of level, porous sealant on both sides is longwise pasted. Through fastening of level of the valley gutter to furring at distance closer than 250 mm from valley gutter axis is forbidden.
The pad of the valley gutter fastens over wave of sheets of metal tile with step of 300 mm from each party. After mounting of sheets of metal tile the place of adjunction is closed by adjunction level. The overlap of levels of adjunction longwise makes 100 mm.
Between leaf of metal tile and level of adjunction porous sealant is pasted. For additional sealing of places of adjunction to wall the strong pressurizing tape and roofing sealant is used.
Mounting of ridge level
Mounting of ridge level is carried out with use of universal fastening of ridge spine bar which is established along the ridge fad with step of 500-600 mm.
For ensuring ventilation of subroofing space the sheets of metal tile from the next slopes of dual-slop roof should not meet under ridge level closely to each other. They fasten, without reaching bar of 50 mm.
That through this gap precipitation did not get and, at the same time, through it natural ventilation of roof was carried out, along all skates of ridges it is necessary to put rolled aero element from strong nonwoven fabric. Mounting of rolled element with the self-gluing strips should be made of butyl rubber at air temperature not lower than + 5 degrees.
For the same purposes it is also allowed, but with much smaller efficiency, use of porous sealant which fastens before attachment of ridge level over sheets of metal tile.
The ridge level can fasten to ridge bar roofing self-tapping screws 35 mm long or to furring through sheets of metal tile self-tapping screws 50 mm long in the top point of every second wave.
The overlap of levels of the semicircular fad is carried out on stiffening fins. Overlap of direct ridge levels — 100 mm.
Mounting of additional roof units
- For prevention of spontaneous snow in undesirable places, for example, over entrance and also for protection of drains it is necessary to establish tubular snegozaderzhatel of elliptic or round shape with a diameter not less than 30 mm. They fasten along eaves under the second cross step of metal tile or at the level of load bearing wall of the house. For ensuring reliability of installation of support of snegozaderzhatel the screws have to be fixed not closer than 2 cm from edge of furring.
- For filing of eaves plastic or metal panels spotlights which fasten horizontally by means of G- or F-profiles are used. For ensuring ventilation of subroofing space it is better to use the spotlights supplied with perforation.
- When using front board for arrangement of eaves overhang the brackets of water waste system need to be fixed on front board with step 600 mm. On brackets complaints of drain are established.