Tie Three Roof Systems Together

Step 3 connecting the new roof.

Tie three roof systems together.

Both permanent and temporary roof anchor points are available. After the addition roof is framed and sheathed snap a line on the existing roof shingles 2 in. Up from the valley center and cut through the shingles and underlayment. The 2015 international residential code does not require collar ties or collar beams.

Roof anchors can be as simple as a d ring connection or as complex as a complete lifeline system. Cut two rafters with a circular saw to the pitch of the addition roof and nail them across the rafters on the old roof. This is important to minimize the chance of any water being able to penetrate the gap. To keep the porch roof framing as simple as possible we installed a structural ridge supported by posts at each end with the common rafters landing on top of the ridge.

The roof i. Anchor points are usually installed on the roof and are used to connect lanyards lifelines and other forms of tie off which prevent a worker from falling. In this video we show you how to tie in an existing roof with a new roof to avoid any future leaks or issues putting you back where you started. The new roof will need to be cut to the right angle so that it fits snugly against the roof.

The new roof now needs to be connected by nailing through the board into the joists. The easiest way to tie in the new shingles with the old is with a cut valley see four ways to shingle a valley. That s really only true in comparison to the forces on the higher collar tie in the upper 1 3 of the roof or the lower rafter tie in the lower 1 3 of the roof. In practice temporary loads placed on the center of the roof such as from snow workers or bundles of shingles during re roofing will press inwards and the mid span rafter tie will be.

Blind valleys simplify framing. The roofing cement will resist possible leaks overnight. They also sell specially designed rainwater drains. They form an upside down v with the point at the top of the addition roof.

A collar tie is a tension tie in the upper third of opposing gable rafters that is intended to resist rafter separation from the ridge beam during periods of unbalanced loads such as that caused by wind uplift or unbalanced roof loads from snow. The system includes all the components and flashing details. Using a pitch measuring tool that i d made we also determined that the exact pitch of the shed roof was 3 1 2 in 12.