Decra Plus Tile

Decra's Training Officer Peter Gibson guides you through the installation process for the Decra Plus Tile

10. Walking On The Tiles
When walking on the roof it is strongly recommended that installers should wear soft soled safety shoes to avoid any possible abrasion to the surface coating.
Your weight should be concentrated over the front edge and in the pan of tiles, as this is the area supported by battens.  Weight MUST NOT be applied to the raised crown of the profile on the middle of tiles.
  
If you have managed to dent a tile refer to the tips section
 

11. Start Laying The tiles

Lay the tiles starting at the batten below the ridge.

When putting your first nails in take care not to puncture the underlay below.

Q   Why lay from the top?

A   Although this is the opposite of traditional tiling practice, by laying from the top the tiles interlock tighter and it is actually quicker to lay the Decra tiles this way.

Q   Do I lay the tiles straight bond or staggered bond?

A The choice is yours, If you are roofing a straight forward gable to gable roof then straight bond is the quickest way to do it,  but for best appearance lay the laps away from the principle line of site of the building.
If you are roofing a hipped or valley roof then you will find that it’s quicker to lay the tiles broken bond, working away from the hip and valley.

Q  Starting from a gable end?

A  Then don’t forget you may need to allow for an appropriate upstand at the gable end of the tile (see gable sections).

Q   How much side lap?

A

Q  Which direction should I lap the tiles?

A  Decra Classic Tiles can be laid from left to right or right to left but for best appearance lay laps away from the principle line of sight.

12. When You Have Laid Several Courses
Decra Plus Tiles are twice the thickness of standard Decra Tiles, so a nail punch is needed to get you started.

When you have laid several courses (laying them one under the other, by lifting the nose of a tile and tucking the next tile under) start pre-punching the tiles using a nail punch and then nail with Decra Plus nails, 4 per tile, laps and every other pan.

Nail tiles through the nose as shown in the sketches, leaving bottom course loose until more tiles are laid.

You must only use fixing nails and screws supplied by Decra, OTHERWISE the Decra guarantee is invalidated.

13. Nail The Eaves Course
Nail the eaves course 10mm from the high point of the pan into the top of fascia or eaves batten (if eaves ventilation is being fitted, see ventilation pack for nail positions)

Use 4 nails per each tile.
After completion of roof cover these nail heads with Decra finishing kit.

14. Gables
The gable detail is finished using a Decra D Box Barge Cap.  The D Box Barge Cap is similar to the D Ridge in appearance but the angle is much steeper (see below).

Decra tiles to be cut and bent forming an upstand against a gable runner batten.

Before installing the first D Box Barge Cap it is necessary to trim and fold the ends to form a blocked end at the eaves.  Mark out a line 40mm from the bottom edge of D Box Barge Cap. Cut away areas shaded black on image below. Fold vertical flap 90° in on itself, fold horizontal flap down by 90°.

The D Box Barge Caps have a slight taper in their design. Place the wider end of the D Box Barge Cap over the narrower top end of the D Box Barge Cap beneath creating an 80mm overlap.

Nail D Box Barge Cap into position using 4 nails skew fixed down the inner face of the D Box Barge Cap into the upstand of the tile and 4 horizontally (see images below. Care should be taken to ensure D Box Barge Cap are correctly lapped.