Felt Roof Shingle Installation Guide – Icopal Bitumen Roofing Shingles

Roof Shingle Installation - Valleys

 

Using Icopal Bitumen Roofing Shingles to Waterproof Valley Sections

Valley detailing sections must be completed before the main roof shingles are applied.

It is recommended that the valley is first lined with a layer of bitumen roof shingle underlay, nailed into position.

The bitumen roof shingle underlay must be laid from the bottom working up the slope with any end laps having the head of the lower sheet nailed and the upper sheet overlapping the lower sheet to cover the nailing and to create a minimum overlap of 100mm sealed with an appropriate bitumen sealant.

The valley is finished by applying individual tabs cut from the shingle centrally over the valley, which are nailed at the top edge and overlapped by successive tabs.

The lower edges of the tabs should be sealed with an appropriate bitumen sealant.

Be careful not to apply too much sealant too close to the edges of the tab to avoid excess being squeezed out. Also avoid dripping sealant onto the finished work.

As the bitumen roof shingles are laid up to the valley the last tabs should be left loose to allow cutting to the line of the valley and subsequent nailing and sealing with an appropriate bitumen sealant.

 

Other roof shingles installation guide topics

Roof Preparation and Installation of the Underlay

Applying the Roof Shingle Strip to Eaves and Verges

Application of Roofing Shingles to the Main Roof Areas

Application of Roofing Shingle to the Ridge

Using Bitumen Roofing Shingles to Waterproof Hip Sections 

 

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