Ulin Sirap Roofing in Bali: Sizes, Shapes and What to Know Before Ordering

Sirap gives a roof a distinctive natural appearance. The small overlapping timber pieces create texture and a visual rhythm that can suit pavilions, villas and architectural projects looking for a warm, traditional material.

Kitaru offers Ulin sirap made from suitable offcuts generated during Ulin board production. This is a specific product, and it should not be confused with reclaimed timber in the usual commercial sense. The pieces are prepared from available Ulin material that meets the requirements for making sirap.

Before ordering, it is important to understand the standard dimensions, the available shapes and the information that the roofing professional needs to confirm.

What is Ulin sirap?

Ulin, botanically known as Eusideroxylon zwageri, is a dense hardwood used in a range of demanding applications. In sirap form, it becomes a small roofing element installed in overlapping courses.

The appearance of a sirap roof depends on the individual pieces, their arrangement and the overall roof design. The result can be visually striking, but the material should be selected as part of a complete roofing system rather than as an isolated product.

The roofing professional is responsible for determining whether the proposed sirap system is suitable for the roof design and site conditions.

Standard dimensions offered by Kitaru

Kitaru's standard Ulin sirap pieces are approximately:

• Length: 60 cm
• Width: 8 cm
• Thickness: 3 to 5 mm

These dimensions describe the standard product. Thicker versions, around 8 mm, are less common and may be requested subject to the available material and production requirements.

The standard shape is rectangular. A pointed or triangular end can be discussed as a special request, subject to a minimum order quantity. It should not be assumed that every shape or thickness is available immediately.

Because the sirap is prepared from production offcuts, the source pieces need to be long enough to be transformed. Pieces shorter than the required length are not suitable for the standard 60 cm product.

Understanding the available shapes

Rectangular sirap is the usual format. It provides a straightforward visual pattern and is the standard option to discuss first.

A pointed or triangular end creates a different roof appearance. This is a special shape and needs to be discussed before an order is prepared. The quantity, production requirements and minimum order should be confirmed with Kitaru.

The shape should be chosen with the overall roof design in mind. The roofing professional should confirm how the selected pieces will be arranged and whether the chosen pattern is compatible with the roof geometry.

Why the roofing specification matters

The number of sirap pieces required cannot be determined reliably from roof area alone. The roof shape, pitch, exposure, overlap, layout, edges, ridges and other details influence the quantity and installation method.

The roofing professional must establish the appropriate system and calculate the quantities. This includes deciding the overlap, the number of layers, the supporting arrangement and the fixing details. These are project-specific decisions, not universal instructions that can be supplied from a general product description.

For a precise quotation and order preparation, Kitaru normally works from a cutting list or quantity schedule prepared and checked by the architect or roofing professional. Photos and drawings are welcome for an initial discussion, but they do not replace the final specification.

A note on water protection

A roofing design may include an additional protective layer beneath the sirap. Kitaru can discuss the use of a bituminous membrane such as Rotoblast as a complementary layer beneath the timber pieces.

This should not be interpreted as a guarantee that the roof will be completely waterproof. The full roofing assembly, including the membrane, roof geometry, detailing, overlaps and installation, must be designed and checked by the roofing professional.

The membrane specification and compatibility with the proposed roof system should be confirmed before ordering. The roofing contractor remains responsible for installation and the complete weatherproofing design.

Preparing your order

When contacting Kitaru, explain the project, the roof location and the intended appearance. Share photos, drawings or design references so that the product options can be discussed.

For a precise quotation, the roofing professional should provide the dimensions and quantities required, together with the chosen sirap shape and thickness. The professional should also confirm the installation system and any complementary materials.

Kitaru can then confirm which Ulin sirap options can be prepared and supplied. Availability of special thicknesses or pointed shapes depends on the material and order requirements.

FAQ

What are the standard dimensions of Kitaru Ulin sirap?

The standard pieces are approximately 60 cm long, 8 cm wide and 3–5 mm thick.

Can I order thicker sirap?

Thicker versions around 8 mm are less common and may be requested, subject to availability and production requirements.

Can the ends be pointed?

A triangular or pointed end can be discussed as a special request and is subject to a minimum order quantity.

Is Ulin sirap made from reclaimed timber?

It is made from suitable Ulin production offcuts. It should not be described as reclaimed timber in the usual commercial sense.

Does Rotoblast guarantee a waterproof roof?

No. It can be considered as a complementary protective layer, but the complete roofing system must be designed and installed by the responsible professional.

Discuss your sirap roof with Kitaru

Planning a sirap roof in Bali? Contact Kitaru to discuss Ulin sirap sizes, available shapes and supply options. Send us your roof drawings or photos to start the conversation. For a precise quotation and order preparation, please provide the cutting list prepared and checked by your architect or roofing professional.