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close this bookAttic Completion Work - Course: Timberwork Techniques. Trainees' Handbook of Lessons
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View the document1. Purpose of Attic Completion Work
View the document2. Types of Roof Superstructures
Open this folder and view contents3. Building-in of Roof Superstructures

2. Types of Roof Superstructures

Roof superstructures for housing purposes are normally designed as roofed upright windows. For roofs having a roof pitch of less than 50 degrees, upright windows with lean-to dormer or with hip roof are recommended.


Figure 4 Roof pitch of less than 50 degrees

(1) Lean-to dormer roof, good solution
(2) Hip roof, good solution
(3) Gable roof, bad solution, (4) Lean-to dormer roof, bad solution

1 ridge (main roof), 2 eaves (main roof), 3 roof superstructure, 4 window roof (roof superstructure), 5 rafter (main roof), a - eaves angle (main roof) a - bonding-in length in the roofing

For the lean-to dormer it is important that the bonding-in in the roofing is not too near to the roof ridge. If upright roof windows of roofs having such pitches are roofed with gable roofs, they make a poor impression. The ridge of the window roof appears too long - see Fig. 4.

For roof pitches of more than 50 degrees, an upright roof window roofed with gable roof is recommended.


Figure 5 Roof pitch of more than 50 degrees

(1) Gable roof, good solution (2) Hip roof, bad solution (3)Lean-to dormer roof, bad solution

1 ridge (main roof), 2 eaves (main roof), 3 roof superstructure, 4 window roof (roof superstructure), 5 rafter (main roof), a - eaves angle (main roof) a - bonding-in length in the roofing

If in this case the window is roofed with a lean-to dormer or hip roof, it makes a bad appearance because the ridge line appears too short (see Fig. 5).

Why does attic completion work also call for roof superstructures?

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Why should the roof superstructure be suited to the existing roof pitch?

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