HIPPED ROOFS REVIEW& DUTCH GABLES ON HIPS

Created by Michael Martin 13/9/04 – Reviewed June 2010

Hip Components Review

Hip Bevels

Rafter & Creeper spacing

You can either• Mark your creepers on pattern rafter, or

• Calculate their true length

Some people refer to this as a gambrel end Can be finished with

◦ Fibre-cement sheets, or ◦ Timber cladding, or◦ Other desired finish

Must be correctly flashed

Dutch Gable on a hipped roof

Flashing to Dutch Gable

Insert flashing behind cladding, minimum of 50mm turn up

Small Spans Small roofs can be

framed on top of hip like shown (handout)

Larger spans are approached differently, which we’ll look at now (handout)

Large spans are done as shown below

Set out and ridge length

• Size of gablet is determined by the number of rafter spacings past the centering rafters

• Set out of centering rafters remains the same as for the hipped roof

Set out & Ridge continued

Length of ridge for hip initially the same (handout), then rafter spacings added

If at one end only, add three rafter spacings

If at both ends, then add six rafter spacings

Pitching plate & Jack Rafters

Pitching plate

New jack rafters, are cut over the top

The easiest way to position the pitching plate and determine length of jack rafter, is to set it out on a pattern

Looking at a centre line plan view, of this roof, is the easiest way to determine this

Shown on the next slide

Lengths and position

Length for pattern

This example has a two rafter overhang and is also the one you will make

Set-out gathering point

• The jack rafter can be set out on the pattern, just as you do the creepers

• 1st count additional rafters (two)

• so you can step two spacings down from centre line on pattern

• Then allow for ½ thickness of rafter after that

• This point is the length of your jack rafter

• Cut this and use as a set-out for pitching plate

One rafter spacing

Two rafter spacing

½ rafter

Pitching plate continued

Use cut jack rafter to mark position for pitching plate

Pitching plate is located at this position

Jack Rafters

Cut in all jack rafters and notch over pitching plate

Cut in Hips & Creepers

Cut in small hips and short creepersHipsCreeper

s

Dutch Gable End

To complete fill in gable with trimming studs

Workshop exercise

HANDOUTTo build a scaled down version of Dutch gable roof

It will be an assessment event, must complete & pass