Slate Roof Valley Construction

A roof valley is very prone to leaks especially if you have an older roof.

Slate roof valley construction.

We have used north country black on a large number of occasions and we ve found it to be an excellent quality slate it is very workable. Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet. Grp valleys have pre formed upstands to prevent the ingress of water and for mortar bedding some have integral sand strips to ensure a good adhesion between the mortar and valley lining. Preformed mortarless valleys the roof construction for mortarless valleys is similar to that for open grp valleys.

Part 1 a guide to roof construction covers an overview of flat and pitched roofs. Bs en12588 replaced bs1178 in august 1999. Slating terms and phrases if you are not a seasoned roofer some of the terms used for slates batten spacing or overlapping of the slates can add to the confusion. Open valley closed cut valley and woven roof valley and we include roof valley underlayment and nailing specifications.

With your wider slate in hand rotate it 180 degrees so it can be marked for cutting. Valley gutters 19 box and tapered gutters 20 secret gutters 21 flat roof coverings 22 window flashings 23 contents note. Part 3 of the four part guide to roof construction covers pitched roof detail. To get the most out of it is helpful to also read parts 1 and 2.

We describe how to construct three common styles of roof valley. This article discusses details and specifications for roof valley flashing for best construction roof leak resistance. The reason why the roof valley is such a sensitive area has to do with all the rainwater and or melting snow that accumulates and flows through the valley on its way into the gutters. When installing slates along the valley it is important to place the nails so they do not puncture the valley flashing.

Calder lead sheet and flashing conforms to the new european standard. Here you can find instructions for installing a slate roof repairing and restoring slate roofs and repairing asbestos roofs and ceramic tile roofs. Roof pitch the angle of a roof not only determines what slates to use but the amount of overlap that the slate roof needs to remain waterproof. When our clients are looking for a natural slate roof we highly recommend north country slate.

Raines brothers inc. The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. The slate roof bible joseph. Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings.