TYPES OF ROOF COVERING AND ITS DETAILS.

1. BY
JUHI CHAUHAN
PIYUSH PATHAK
SHADAB SAIFI
HIMANSHU SINGH

2.  THE COVERING MATERIAL INSTALLED
IN A BUILDING OVER THE ROOF
DECK. THE TYPE OF COVERING
USED ON THE ROOFING SYSTEM
SPECIFIED TO WEATHERPROOF THE
STRUCTURE PROPERLY.

3. • SLATE ROOFING TILES
• ALLHABAD TILES
• BURNT CLAY TILES
• CONCRETE TILES

4. • Extremely low water absorption index,
less than 0.4%, which makes its resistant
to frost damage.
• Consists of bituminous slates called
eternit (generic term for fiber cement).
• Available in three colours-grey,black and
red.
• SIZE- 12’’x6’’, 6mm thickness
• COST- 25-30/Sq.ft

5. Each slab is divided into thin laminate or
slate by using splitters
Reduced to slabs after dividing into
sections using diamond or circular saw.
Slates are obtained from quarries as
blocks

6.  Slates roofs tiles are usually
fixed either with nails or with
hooks.
 Fixing is typically with double
nails onto timber battens or
nailed direclty onto
timbersarking boards.
nails are made up of alloy
and stainless steel.
2/25/2018

7. • Laid such that each slate overlaps a slate in the next
course below it.
• Two holes are made from the bed of the slab at the
centre or head so
• Slates are fixed to battens by copper or zinc nails.
• The spacing of battens i.e,gauge is determined as
gauge=(length of slate-lap)/2
• A layer of felt is used below slate to exclude rain water
and moisture.
Battens
SLATES
OVERLAP

8. •Allahabad tiles are generally laid side by side and the joints are covered with half round
tiles.
•It consists of flat broad bottom undertile that alternate with convex curved overtile.
•Unfertile is flat,tapered,with flanges at the side.
•The overtile is half round and tapered in plan with diameter tapering from 16 cm at tail to
12 cm at the head.
•The taper in the overtile allow the tile in next course to fit in.
• Vertical battens of size 2.2cmx7.5cm are fixed between sides of adjacent undertiles
and to these half round overtiles.
•Overtiles are fixed to vertical battens with 75 mm nails.
•Cost- 55-145 Sq.ft

10.  Clay roofing tile is a good choice for homes with a southwestern, Italian, or
Spanish Mission design, or even for homes with a modern, clean look.
 Tile lasts a long time
 Burnt clay tile roofs are only used for sloping roofs between about 20° and 50°
inclination of rafter.
 Clay tiles are heavy, requiring a strong substructure and closely spaced battens.
 SIZES- 2’’x6’’
3’’x 8’’(Max)
 COST-45-65/ sq.ft

11. ADVANTAGE
 Tile won't rot or burn, and it can't be harmed by insects.
 The color of a clay tile is not affected by exposure to the
elements, it can easily last for 100of years.
DISADVANTAGE
 A major problem of clay tiles is the immense loss due to
cracking and breakage.
 Clay tile production is a traditional village craft in many
regions, but uniform shapes and qualities are difficult to
achieve.

12.  Special properties- Durable, waterproof cladding
for sloped roofs
 Economical aspects -Low to medium costs
 Resistance to earthquake- Low
 Resistance to hurricane- Medium to good
 Resistance to rain- Very good
 Resistance to insects -Very good
 Climatic suitability- All climates, but most
common in humid areas

14. Burnt clay tiles requires inspections at least twice
a year so as to last for further years.
They often develop cracks with years.
A cracked tile needs to be replaced or repaired in
place.
Mix up a small amount of mortar and carefully fill
in the crack. Be sure to wet the tile with plenty of
water to help the mortar set up properly.
Tiles will be slippery when wet

15.  Plain tiles, pantiles, Roman tiles, interlocking
tiles, and ridge, hip and valley tiles are made of
this material.
 The mixture is composed of normal Portland
cement and clean well-graded sand.
 The body treated with mineral granules which
have been coated with color.
pantiles
ridge
Roman tiles

16.  Durability estimates range from 30 to 50 years.
 Weigh between 9 1/2 and 12 pounds(1 pound =.45 gram)
per square foot.
 Size is 265mm by 165 mm and 12mm thick.
 Require low maintenance
 Offer good fire protection and are resistant to rot and
insects.
COST- INR 150 to INR 300/ Sq.ft

18. The usual lap for plain tiling is 65mm, for pitched roof at 37 degree.
For pitches up to 60 degree the tiles should be twice nailed in
every third course to once nailed in each course.
For pitches exceeding 60 degree all tiles should be nailed twice.
The nails are usually 38 mm long and may be either galvanized
wrought iron, zinc, copper or composition.

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