USE OF MATERIALS PER BUILD OPTION
MATERIAL SPECIFICATIONS
In this paragraph you will find an overview of our 4 main material build options that we offer for our tropical wooden prefab homes broken down per prefab part.
The material specifications shown in this paragraph are only valid for standard use under normal environmental conditions and do not include a cyclone-rated material upgrade. To identify this you need to use our interactive price list which can be downloaded after you have enquired about it. You may fill in the inquiry form < here >.
NOTE FOR LUMBUNGS: The material specifications for the lumbungs differ from our standard wooden house material specifications as shown below. The Lumbung specifications can also be different between themselves. You may fill in our < contact form > and contact us for a material description of the lumbung(s) of your choice.
Continue reading about the wood species that we use and the termite protection measures, or jump to the < build options >
Our build options are based on the commercial availability of legally felled Indonesian tropical hardwoods. The main hardwood species that are commercially available and used for the prefabrication of wooden houses are Bangkirai, Camphor, Merbau, Teak, and Ulin, and, to a lesser extent, Sonokeling. We mainly use Bangkirai and Camphor tropical hardwoods because Merbau and Teak are far more expensive, Ulin is subject to export restrictions, and Sonokeling is available only in very limited quantities.
We normally divide a wooden house into two parts: the part of the house below the ground floor and the part of the house above the ground floor.
The reason is twofold. Although we aim to provide a crawl space with a minimum height of approximately 80 cm (2.6 ft) below the ground floor, it can be difficult to access such a space and carry out regular inspections to determine whether termites are present. Such inspections are important for detecting termite activity at an early stage, particularly because subterranean termites can easily enter a building from the surrounding soil.
We therefore consider the area below the ground floor to be an important protective zone and recommend providing it with the highest level of timber durability available within our build options. For this purpose, we use Grade “A” Bangkirai heartwood (*), which has a high level of natural durability and documented resistance to termite attack. However, natural termite resistance should not be regarded as an absolute guarantee against termite attacks. Our standard use of wood for the Basic and Standard build option is Grade "B" hardwood. In order to comply with the aim to prevail on the highest level of termite protection we advise replacing Grade "B" with Grade "A" wood
(*) Refer to < termite proof >
The second reason is that significant costs can be saved. By using naturally durable Bangkirai heartwood in the areas considered most vulnerable to termite entry and by incorporating appropriate inspection and protection measures, the risk of termite damage to the timber structure can be reduced significantly.
Less expensive timber, such as Camphor, or Bangkirai containing a proportion of sapwood, may therefore be used for certain parts of the construction under our Grade “B” classification, provided that appropriate protective measures and regular inspections are carried out. The precise durability of Camphor can vary according to the species and timber source, and it should therefore not be regarded as equivalent to Bangkirai heartwood.
In this way, early signs of termite activity affecting the timber above the floor can be detected and appropriate measures can be taken before significant damage occurs.
Even timber supplied as 100% heartwood may contain a certain proportion of sapwood. Sapwood is generally less naturally durable than the heartwood and can be more susceptible to biological attack, including termites. It should therefore receive appropriate protection wherever it is exposed or used in areas vulnerable to termite attack.
BUILD OPTIONS
Wood used for the main components (pedestals, columns, flooring, joists and flooring)
Basic Option
Grade “B” tropical Bangkirai hardwood with one layer of an environmentally friendly termite preventive coating below the floor, and tropical Camphor hardwood for the parts above the floor.
Standard Option
Grade “B” tropical Bangkirai hardwood with two layers of an environmentally friendly termite preventive coating below the floor, and tropical Camphor hardwood for the parts above the floor.
Premium Option
Grade “A” tropical Bangkirai hardwood with one layer of a specially formulated termite preventive epoxy resin coating below the floor, and tropical Camphor hardwood for the parts above the floor.
Superior Option
Grade “A” tropical Bangkirai hardwood with one layer of a specially formulated termite preventive epoxy resin coating below the floor, and tropical Bangkirai hardwood for the parts above the floor.
The coating for the sidings above the floor will be our standard application of acrylic coating, in accordance with the number of coating layers specified for each build option.
Find below the detailed breakdown list of all the build options and the materials used per each building component.
♠ BASIC OPTION (only recommended for local use)
Solid Camphor wood Grade "B" with a thickness of 18 mm (0.7"). The boards are connected by a rabbet system with galvanized steel fixing screws hidden to the eye. Anti-termite treatment for the flooring bottoms with 1 layer of an anti-termite insecticide with a guarantee period of 5 years..Possibility to upgrade with stainless steel grade 304 fixtures.
♠ STANDARD OPTION
Solid Camphor wood Grade "B" with a thickness of 22 mm (27/32"). The boards are connected by our in-house developed special T&G system with stainless steel grade 304 fixing screws hidden to the eye. Anti-termite treatment for the flooring bottoms with 2 layers of an anti-termite insecticide with a guarantee period of 5 years. Possibility to upgrade to full termite-resistant Bangkirai.
♠ PREMIUM OPTION
Solid termite-resistant Bangkirai Grade "A" with a thickness of 22 mm (27/32"). The boards are connected by our in-house developed special T&G system with stainless steel grade 304 fixing screws hidden to the eye. Anti-termite treatment for the flooring bottoms with one layer of a specially formulated epoxy resin coating.
♠ SUPERIOR OPTION
Solid termite-resistant Bangkirai Grade "A" with a thickness of 22 mm (27/32 inch). The boards are connected by our in-house developed special T&G system with stainless steel fixing screws grade 304 hidden to the eye. Anti-termite treatment for the flooring bottoms with two layers of a specially formulated epoxy resin coating..
♠ BASIC OPTION (only recommended for local use)
Main floor beam structure from Grade "B" 45 x 140 mm (1 3/4" x 5 1/2") Camphor wood. Maximum span width of beams up to 2500 mm (approximately 8' - 3"). Connections with galvanized steel. Anti-termite treatment for the flooring bottoms with 1 layer of an anti-termite insecticide with a guarantee period of 5 years. Possibility to upgrade to stainless steel.
♠ STANDARD OPTION
Main floor beam structure from Grade "B" 45 x 140 mm (1 3/4" x 5 1/2") flooring beams using Bangkirai wood with a treatment of 2 layers of an anti-termite insecticide with a guarantee period of 5 years. The maximum span width of beams is 2000 mm (about 6' 7"). Connections with stainless steel grade 304 fixtures. Possibility to upgrade with full termite resistant Bangkirai wood.
♠ PREMIUM OPTION
Main floor beam structure from Grade "A" 45 x 140 mm (1 3/4" x 5 1/2") flooring beams using full termite-resistant Bangkirai. The maximum span width of beams is 1800 mm (about 6 ft). Anti-termite treatment for the beams with one layer of a specially formulated epoxy resin coating. Connections with stainless steel grade 304 fixtures.
♠ SUPERIOR OPTION
Main floor beam structure from Grade "A" 45 x 140 mm (1 3/4" x 5 1/2") flooring beams using full termite-resistant Bangkirai. The maximum span width of beams is 1800 mm (about 6 ft). Anti-termite treatment for the flooring bottoms with two layera of a specially formulated epoxy resin coating. Connections with stainless steel grade 304 fixtures.
♠ BASIC OPTION (only recommended for local use)
Subfloor beam structure from Grade "B" 45 x 100 mm ( 1 3/4" x 4") Camphor wood. Spacing between the joists is around 600 mm (2'), hence some floor deflection shall be accepted. Connections with galvanized steel. Anti-termite treatment for the flooring bottoms with 1 layer of an anti-termite insecticide with a guarantee period of 5 years. Possibility to upgrade to stainless steel
♠ STANDARD OPTION
Subfloor beam structure from Grade "B" 45 x 100 mm (1 3/4" x 4") using Bangkirai wood with a treatment of 2 layers of an anti-termite insecticide with a guarantee period of 5 years. The spacing between the subfloor beams is a maximum of 650 mm. Anti-termite treatment for the beams with one layer of a specially formulated epoxy resin coating. Connections with stainless steel grade 304. Possibility to upgrade with full termite resistant Bangkirai wood and with stainless steel fixtures grade 316.
♠ PREMIUM OPTION
Subfloor beam structure from Grade "A" 45 x 100 mm (1 3/4" x 4") from full termite-resistant Bangkirai. The spacing between the subfloor beams is a maximum of 500 mm, hence no floor deflection. Anti-termite treatment for the flooring bottoms with one layer of a specially formulated epoxy resin coating. Connections with stainless steel grade 304 fixtures
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♠ SUPERIOR OPTION
Subfloor beam structure from Grade "A" 45 x 100 mm (1 3/4" x 4") from termite-resistant Bangkirai. The spacing between the subfloor beams is a maximum of 450 mm, hence no floor deflections. Anti-termite treatment for the flooring bottoms with two layers of a specially formulated epoxy resin coating. Connections with stainless steel grade 304 fixtures.
♠ BASIC OPTION (only recommended for local use)
100 mm x 100 mm (4" x 4") pedestals made from Camphor wood Grade "B". Anti-termite treatment for the flooring bottoms with 1 layer of an anti-termite insecticide with a guarantee period of 5 years. Connections with galvanized steel. Possibility to upgrade to stainless steel
♠ STANDARD OPTION
140 mm x 140 mm (5 1/2" x 5 1/2") pedestals fro Grade "B" with a treatment of one layer of an anti-termite insecticide with a guarantee period of 5 years. Connections to main floor beams using stainless steel grade 304 fixtures. Possibility to upgrade with full termite resistant Bangkirai wood grade 316.
♠ PREMIUM OPTION
140 x 140 mm (5 1/2" x 5 1/2"" peserals from Grade "A" full termite-resistant Bangkirai. Anti-termite treatment for the flooring bottoms with two layers of a specially formulated epoxy resin coating. Connections with stainless steel grade 304 fixtures.
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♠ SUPERIOR OPTION
140 x 140 mm (5 1/2" x 5 1/2"" peserals from Grzde "A" full termite-resistant Bangkirai. Anti-termite treatment for the flooring bottoms with two layers of a specially formulated epoxy resin coating. Connections with stainless steel grade 304 fixtures.
♠ BASIC OPTION (only recommended for local use)
Structural Grade "B" main columns 100 mm x 100 mm (4" x 4") from Camphor wood. Structural sub-columns 80 x 80 mm (3 1/8") Connections with galvanized steel. Anti-termite treatment for the flooring bottoms with 1 layer of an anti-termite insecticide with a guarantee period of 5 years.Possibility to upgrade to stainless steel. Possibility to upgrade to stainless steel
♠ STANDARD OPTION
StructuralGrade "B" main columns 140 mm x 140 mm (5 1/2" x 5 1/2") using Bangkirai wood with a treatment of 2 layers of an anti-termite insecticide with a guarantee period of 5 years. Structural sub-columns are 100 mm x 100 mm (4" x 4') or 80 x 80 mm (3 1/8"), where applicable. Connections to main floor beams using stainless steel threaded rods with nuts and washers, grade 304. Possibility to upgrade with full termite resistant Bangkirai wood and/or with stainless steel fixtures grade 316.
♠ PREMIUM OPTION
Structural Grade "A" main columns 140 mm x 140 mm (5 1/2" x 5 1/2") from full termite-resistant Bangkirai. Structural sub-columns are 100 mm x 100 mm (4" x 4') or 80 x 80 mm (3 1/8"), where applicable. Anti-termite treatment with one layer of a specially formulated epoxy resin coating.Connections to main floor beams using stainless steel grade 304 fixtures.
♠ SUPERIOR OPTION
Structural Grade "A" main columns 140 mm x 140 mm (5 1/2" x 5 1/2") from full termite-resistant Bangkirai. Structural sub-columns are 100 mm x 100 mm (4" x 4') or 80 x 80 mm (3 1/8"), where applicable. Anti-termite treatment with two layers of a specially formulated epoxy resin coating. Connections to main floor beams using stainless steel grade 304 fixtures.
♠ BASIC OPTION (only recommended for local use)
Roof trusses, rafters, and purlins from Camphor wood from Grade "B". Fixtures from galvanized steel.
♠ STANDARD OPTION
Roof trusses, rafters, and purlins from Camphor wood. Grade "B". Truss connections using stainless steel threaded rods grade 304. Possibility to upgrade to full Grads "A" wood. Fixtures from grade 304 stainless steel
.
♠ PREMIUM OPTION
Roof trusses, rafters, and purlins from Camphor wood Grade "A". Truss connections using stainless steel threaded rods with stainless steel nuts and washers, grade 304.
♠ SUPERIOR OPTION
Roof trusses, rafters, and purlins from full termite-resistant Bangkirai Grade "A". Truss connections using stainless steel (grade 304) threaded rods, nuts and washers.
♠ BASIC OPTION
Roof decking with Bali-style terracotta roof tiles.
♠ STANDARD OPTION
Roof decking with Bali-style terracotta roof tiles. Roof decking may be changed into thatch, zinc-aluminum corrugated barrel tile sheathing, or wooden shingles against a variation order.
♠ PREMIUM OPTION
Roof decking with Bali-style terracotta roof tiles. Roof decking may be changed into thatch, zinc-aluminum corrugated barrel tile sheathing, or wooden shingles against a variation order.
♠ SUPERIOR OPTION
Roof decking with Bali-style terracotta roof tiles. Roof decking may be changed into thatch, zinc-aluminum corrugated barrel tile sheathing, or wooden shingles against a higher price.
Thatch seen from the inside
Typical thatched roof
Bali-style terracotta roof tiles
Zinc aluminum roof tiles
Available colors for the zinc-aluminum roof tiles
♠ Exterior sidings made from solid 16 mm (0.63") thick Camphor, Grade "B" . No interior siding boards. The exterior siding boards are installed using a rabbet system. The maximum width of siding boards is 140 mm (5 1/2").
♠ STANDARD OPTION
Exterior sidings are made from solid 22 mm (27/32") thick Grade "B" Camphor boards connected by our in-house developed special T&G system. Maximum width of siding boards is 190 mm (7 1/2"). Interior boards from 10 mm thick cement boards (can be substituted with tropical hardwood). Termite-resistant Bangkirai Grade "A" may be chosen for the exterior boards against a variation order. The maximum net width (in sight) of siding boards is 170 mm (6 3/4")
♠ PREMIUM OPTION
Sidings are made from solid double (exterior and interior) 22 mm (7/8") thick Grade "A" Camphor, connected by our in-house developed special T&G system. The interior boards have a seamless V-groove connection. Termite-resistant Bangkirai Grade "A" may be chosen for the exterior boards against a variation order. The maximum net width (in sight) of siding boards is 170 mm (6 3/4")
♠ SUPERIOR OPTION
Exterior sidings are made from solid 22 mm (27/32") thick Grade "A" termite-resistant Bangkirai boards connected by our in-house developed special T&G system The exterior boards are installed with our proven rainwater run-off sill. The interior boards from 22 mm (7/8") Camphor boards with a seamless V-groove connection. The maximum net width (in sight) of siding boards is 170 mm (6 3/4").
The partitions are made from a double-sided 10 mm thick (4") core board.
♠ STANDARD OPTION
The partitions are made from double-sided 10 mm thick cement boards.
♠ PREMIUM OPTION
Partition boards are double (sandwich) sidings made from 16 mm (5/8") thick Camphor boards.
♠ SUPERIOR OPTION
Partition boards are double (sandwich) sidings made from 16 mm (5/8") thick Camphor wood
The exterior siding boards are installed onto a Coconut wood framing system.
♠ STANDARD OPTION
The sidings will be installed onto a Camphor wood Grade "B" framing system. The sandwich construction of the boards onto a framing system creates a cavity of 60 mm (2 1/3") which can be utilized to hide electrical cables, conduits, and plumbing lines. The cavity can also be used for insulation. The total thickness of the sandwich siding is 92 mm (3 1/2"). The frames will be installed along the whole perimeter of the unit. The games are divided into sections of max. 600 x 600 mm (1' x 6") for optimum stability and strength.
♠ PREMIUM OPTION
The siding boards are installed onto a Camphor Grade "B" framing system. The sandwich construction of the boards onto a framing system creates a cavity of 60 mm (2 1/3") which can be utilized to hide electrical cables, conduits, and plumbing lines. The cavity can also be used for insulation. The total thickness of the sandwich siding is 92 mm (3 1/2"). The frames will be installed along the whole perimeter of the unit. The frames are divided into sections of max. 600 x 600 mm (1' x 6") for optimum stability and strength.
♠ SUPERIOR OPTION
The siding boards are installed onto a Camphor Gtade "B" framing system. The sandwich construction of the boards onto a framing system creates a cavity of 60 mm (2 1/3") which can be utilized to hide electrical cables, conduits, and plumbing lines. The cavity can also be used for insulation. The total thickness of the sandwich siding is 110 mm (4 5/16"). The frames will be installed along the whole perimeter of the unit. The frames are divided into sections of max. 400 x 400 mm (1' x 3 1/2") for optimum stability and strength.
Insulation is possible against a variation order.
♠ STANDARD OPTION, PREMIUM OPTION, AND SUPERIOR OPTION
Both the sidings and the roof can be insulated against a variation order. Roof insulation is mandatory in Hawaii. Insulation against a variation order.
The standard ceiling (if applicable) is Bamboo matting. Ceilings can be supplied from rattan panels or wood against a variation order
♠ SUPERIOR OPTION
The standard ceiling (if applicable) is rattan matting. Ceilings can be supplied from wood against a variation order
Bamboo matting
Rattan
Wood
♠ BASIC OPTION
Galvanized threaded steel rods with galvanized nuts and washers. Upgrade to stainless steel is possible.
Doors and windows are made from Meranti and core board panels for the doors. Standard jamb sizes are 60 x 110 mm (2 11/32" x 4 5/16"), except for the sliding doors which are 60 x 140 mm (2 11/32" x 5 1/2"). Door and window rails and stiles are connected using a mortise-and-tenon system. A choice between normal panel doors, sliding doors, folding doors, louver doors and windows, sliding windows, awning windows, etc., provided these will not differ from our standard dimensions. The standard thickness of exterior doors is 35 mm (1 3/8"). The thickness of interior doors and windows is 30 mm (1 1/8").
Locally made hardware for the windows and doors (hinges, locks, handles, etc.) from copper.
♠ STANDARD OPTION
Doors and windows are made from a mix of Meranti and Camphor. Alternatively, Teak, Merbau, Nyatoh, Kempas, or Mahogany can be chosen against a variation order. Standard jamb sizes are 60 x 110 mm (2 11/32" x 4 5/16"), except for the sliding doors which are 60 x 140 mm (2 11/32" x 5 1/2"). Door and window rails and stiles are connected using a mortise-and-tenon system. A choice between normal panel doors, sliding doors, folding doors, louver doors and windows, sliding windows, awning windows, etc., provided these will not differ from our standard dimensions. The standard thickness of exterior doors is 40 mm (1 9/16"). The thickness of interior doors and windows is 35 mm (1 3/8").
Locally made hardware for the windows and doors (hinges, locks, handles, etc.), from copper or stainless steel.
♠ PREMIUM OPTION
Doors and windows are made from Camphor. Alternatively, Teak, Merbau, Nyatoh, Kempas, or Mahogany can be chosen against a variation order. Standard jamb sizes are 60 x 110 mm (2 11/32" x 4 5/16"), except for the sliding doors which are 60 x 140 mm (2 11/32" x 5 1/2"). Door and window rails and stiles are connected using a mortise-and-tenon system. A choice between normal panel doors, sliding doors, folding doors, louver doors and windows, sliding windows, awning windows, etc., provided these will not differ from our standard dimensions. The standard thickness of exterior doors is 40 mm (1 9/16"). The thickness of interior doors and windows is 35 mm (1 3/8").
Imported stainless steel hardware (SES, Deckson, Henderson).
♠ SUPERIOR OPTION
Doors and windows are made from Nyatoh. Alternatively, Teak, Merbau, Kempas, Camphor, or Mahogany can be chosen against a variation order. Standard jamb sizes are 60 x 110 mm (2 11/32" x 4 5/16"), except for the sliding doors which are 60 x 140 mm (2 11/32" x 5 1/2"). Door and window rails and stiles are connected using a mortise-and-tenon system. A choice between normal panel doors, sliding doors, folding doors, louver doors and windows, sliding windows, awning windows, etc., provided these will not differ from our standard dimensions. The standard thickness of exterior doors is 40 mm (1 9/16"). The thickness of interior doors and windows is 35 mm (1 3/8").
Imported stainless steel hardware (SES, Deckson, Henderson).
No weather seals are included but can be installed against a variation of the order. Locally made hardware.
♠ STANDARD OPTION
Locally made weather seals included. Australian imported (Raven brand) seals can be included against a variation order.
Locally made hardware is included but can be changed into imported (Henderson, SES, or Deckson brand) hardware against a variation order.
♠ PREMIUM OPTION
Australian Imported (Raven brand) weather seals included. imported (Henderson, SES, or Deckson brand) hardware included.
♠ SUPERIOR OPTION
Australian Imported (Raven brand) weather seals included. imported (Henderson, SES, or Deckson brand) hardware included.
♠ BASIC & STANDARD OPTION
Standard 5 mm (3/16") clear glass panes for doors and windows (small areas). 5 mm tempered clear glass for large glass areas
♠ PREMIUM OPTION
Standard 5 mm (3/16") clear glass panes for doors and windows and 10 mm tempered glass for large door and window panes. Optional choice for 18 or 12-mm insulated glass, frosted glass, coated glass, etc., against a variation order.
♠ SUPERIOR OPTION
Standard 5 mm (3/16") clear glass panes for doors and windows and 10 mm tempered glass for large door and window panes. Optional choice for 6 mm laminate safety glass, 18 or 12 mm insulated glass, frosted glass, coated glass, etc., against a variation order.
NOTE: When large window or door glass panes need to be installed we use 10 mm thick tempered glass and apply an EPDM rubber strip in the rebates at the bottom window and door rails. These (imported) strips will compress relative to the total weight of the glass pane and prevent the rails will cracking or coming loose under the high weight of the glass panes. The strips will equally distribute the weight along the rebates.
♠ BASIC OPTION
2 layers of Acrylic protective coating in a color of your choice with an 8-month guarantee.
♠ STANDARD OPTION & PREMIUM OPTION
3 layers of Acrylic protective coating in a color of your choice with a 12-month guarantee.
♠ SUPERIOR OPTION
4 layers of Acrylic protective coating in a color of your choice with a 2-year guarantee
