To find out the available features for each of the X ranges and the appropriate codes for each element, click on the following steps for a comprehensive guide: Step 1—Before the detailing begins Step 2—Understanding the rooflight construction Step 3—The attachment zone Step 4—The ventilation zone Step 5—Sizing the rooflight Step 6—The glazing zone Step 7—Specifying glazing only (X-Glaze) Step 8—Required information for bespoke rooflight sizes

To find a full range of PDF and CAD drawings for the Xtralite range, click on the following to go to the downloads section: Go to downloads section

Rooflight Specification Tables

 

Step 1—Before the detailing begins

Consider the following two key elements:

• Most rooflight specification is driven by Part L and consequently U value
  performance. So select the rooflight that meets your particular project
  requirements from the X-One to X-Five range.
• If glazing only (X-Glaze) is required go to step 7. For units that require an attachment or ventilation zone go to step 2.

U Value Options
	X-One	X-Two	X-Three	X-Four	X-Five
U Value (2.2 required for Part L)

 

Xtralite are capable of producing bespoke-sized rooflights, however when size is not
an issue typical standard sizes are shown in step 5 and a guide to measuring the roof opening is shown in step 8.

 

Step 2—Understanding the rooflight construction

 

Rooflight construction is broken down into three key areas:

• Attachment zone
• Ventilation zone
• Glazing zone

You will need to work from the bottom up so firstly—the attachment zone.

 

Step 3—The Attachment Zone

The attachment zone covers three elements:

 

1. The shape of the opening—rectangular, square or circular
2. The various attachment options
3. Security—the inclusion of an intruder grid

Further information regarding these details is available in the individual product sections.

 

Attachment Zone Options
	Code	X-One	X-Two	X-Three	X-Four	X-Five
Roof Opening Shape
Rectangular/Square		•	•	•		•
Circular				•	•	•
Attachment
Kerb with Variable Metal Foot	A	•	•
Kerb with Variable Metal Foot to Suit Kerb to Falls Insulation	B	•	•
Kerb Direct to Roof	C	•	•	•	•	•
Adaptor Kerb	D	•	•	•		•
Sleeve Over	F	•	•	•		•
Security
Intruder Grid	IG	•	•	•	•	•

 

Step 4—The Ventilation Zone

Xtralite’s range of options gives the specifier considerable scope to satisfy the ventilation requirement.

 

Ventilation Zone Options
	Code	X-One	X-Two	X-Three	X-Four	X-Five
Unventilated	00	•	•	•	•	•
Hit and Miss	01		•	•		•
Rotary Vent	02	•	•	•
Wormgear	03	•	•	•		•
Access Hatch with Gas Spring	04G		•	•		•
Access Hatch with Restriction Stay	04F	•	•	•		•
Access Hatch with Electric	04E			•		•
Smoke Vent/AOV with 90° Opening	0590			•		•
Smoke Vent/AOV with 140° Opening	05140			•		•
Smoke Vent/AOV with Dual Pitch Opening	05DP					•
Linear Motor	06	•	•	•	•	•
Emergency Opening Gas Spring	07		•	•		•
Permanent Vent	08					•
Control Louvre	09					•
50% Louvre	10					•
Electromagnet	11			•		•
Electric Sliding Opener	12E					•
Manual Sliding Opener	12M					•
Extract Vent	13					•
Trickle Vent	14				•	•

 

Step 5—Sizing the Rooflight

Xtralite has the ability to manufacture bespoke-sized modular rooflights up to; rectangular 1500 mm x 2400 mm, circular 1800 mm (diameter). The following is a selection of common standard sizes. For larger rooflights see the continuous rooflights, panelised glazing and specialist glazing sections.

 

Size Options (mm)
		X-One	X-Two	X-Three	X-Four	X-Five
Square	600 x 600 750 x 750 900 x 900 1000 x 1000 1050 x 1050 1200 x 1200 1350 x 1350 1500 x 1500 1800 x 1800	•	•	•		•
Rectangular	600 x 900 900 x 1800 600 x 1200 900 x 2400 600 x 1500 1000 x 1500 600 x 1800 1000 x 2000 600 x 2400 1200 x 1500 900 x 1200 1200 x 1800 900 x 1350 1200 x 2400 900 x 1500 1500 x 2400	•	•	•		•
Circular (Diameter)	600 900 1200 1500 1800			•	•	•

 

Step 6—The Glazing Zone

Within the glazing zone there are four options to consider, material, shape, colour and security. Unless otherwise specified the glazing
will be 3 mm polycarbonate for each skin.

 

Glazing Zone Options
		Code	X-One	X-Two	X-Three	X-Four	X-Five
Material*
Polycarbonate	Single	1					•
	Double	2					•
	Triple	3	•	•	•	•
Glass	Single	GL					•
	Double	IGL	•	•	•	•
Shape
Polycarbonate	Pyramid	PY	•	•	•		•
	Dome	DM	•	•	•		•
Glass	Flat	GLASS				•	•
Solid	Flat	SOLID					•
Glazing Colours
Polycarbonate	Clear	CLEAR	•	•	•	•	•
	Diffused	DIFFUSED	•	•	•	•	•
	Opal	OPAL	•	•	•	•	•
	Bronze	BRONZE	•	•	•	•	•
Glazing Security
Security Screws		SS	•	•	•	•	•
Security Frame		SF	•	•	•	•	•
*Glazing options are only those that we recommend to achieve the U value figures shown in step 1. Other options are available on request. ** For your glass specification, please contact Xtralite to review the options available.

 

Step 7—Specifying Glazing Only (X-Glaze)

For those situations where a pre-constructed builder’s kerb already exists, Xtralite provide a polycarbonate glazing only option. A security
screw attachment is available and if further security is required an intruder grid can be fitted. U values vary depending on whether single, double or triple glazing configurations are used. For sizing guidance please refer to step 5.

 

Glazing Only Options
	Code	Configuration
		Triple Skin (3)	Double Skin (2)	Single Skin (1)
U value (2.2 required for Part L)
Polycarbonate options
Dome	DM	•	•	•
Pyramid	PY	•	•	•
Trapezoid	TR	•	•	•
Colour Options
Clear	CLEAR	•	•	•
Diffused	DIFFUSED	•	•	•
Opal	OPAL	•	•	•
Bronze	BRONZE	•	•	•
Security Options
Security Screws	SS	•	•	•
Intruder Grid	IG	•	•	•