Technical Support
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Essential calculators, data sheets, and technical guidance for the South Island construction industry.
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FAQ
Technical Guidance
How do I work out if a door is hung LEFT or RIGHT?
Imagine standing inside the room, open the door towards you, are the hinges on the Left or Right.
Can I buy direct from the Timaru & Cromwell branch?
Timaru & Cromwell Branches operate a 100% merchant support policy which means all orders must be actioned through the builder’s merchant of your choice.
What is the difference between grooved and architrave jambs?
A grooved jamb is where the wall lining (gib) is inserted into a groove in the outside edge of a door jamb. An architrave jamb is where the edge of the jamb is flush with the wall lining and a timber architrave is fitted around the door frame.
What are the benefits of hollow core, poly core, and solid core?
Hollow core is a light residential standard. Poly Core is thermally efficient for H1/AS1 requirements (e.g., between a garage and house). Solid Core is primarily used for sound suppression and a heavier, premium feel.