Roofing

Look for 24-Gauge, 16" Width, Standing Seam, Snap Lock, Striated, Galvalume Coated, Steel Roofing with Unpainted Mill Finish. This type of roofing is perfect for rainwater harvesting and ordering it with a "mill finish" avoids the use of paint.

Dimensions

A good supplier will order what you need for the roof based on the dimensions and pitch. The roofing coverage area is 2 sections which are both 10' 6" tall by 19' 1/2" wide. The pitch of the roof is 12:12.

Blueprint D01

D01.pdf

Read the Manufacturer Instructions

This chapter covers generally what you should expect when installing snap-lock roofing. However, there are several manufacturers of this type of roofing in the US, and the instructions will vary slightly depending on who you use. Consult with the manufacturer or supplier to get the proper instructions for your installation.

01. Fascia

Eave Fascia

Burn & oil two 2x6x8s and two 2x6x12s to use as Eave Fascia. Rather than trusting blueprints for your cuts, it's better to measure the actual structure using a Tape Measure to compensate for any warping that may have occurred during construction.

Standing on the 8' Step ladder install the boards 1.5” below where the fascia meets the sheathing. This will maintain the 45 degree pitch and insure the roofing extends past the fascia. Level each board as you install them. Tack the boards in first using 2 1/2” Galvanized Finishing nails loaded in the Battery-Powered 16 Gauge Finishing Nailer. Then use two 2 1/2” Hex Deck Screws to attach the boards to each rafter using your Battery-Powered Impact Driver. This will help provide additional strength to the rafters, and insures the gutters have plenty of support during rainfall.

Rake Fascia

To measure and cut the four 1x8x12 Boards for the Rake Fascia, first cut 45 degree angles at the end of the boards, then tack them up in place using the Battery-Powered 16 Gauge Finishing Nailer loaded with 1 1/2" Galvanized Finishing Nails. This will allow you then mark the bottom edge using the Eave Fascia to make sure they'll line up. Carefully pry the boards away and hammer out the finishing nails before correcting your marks with a Speed Square and making your cuts. After finishing the boards, install them with 1 1/2" Finishing Nails where needed and two 2 1/2" Hex Deck Screws.

02. Drip Edge

Cutting Metal

To trim metal use Metal Snips for detail work, and a Shears Attachment Accessory attached to your Battery-Powered Impact Driver for long cuts.

Eave Drip Edge

Install the Plumb Eave Drip Edge lapped under the underlayment at the eaves using 1" Pancake Head Woodscrews. Join pieces by trimming the folded sections of the edges so that one can slide into the other. If the drip edge is difficult to screw through, pre-drill holes as often as required in the manufacturer instructions. Use 1/8" Pop Rivets inserted in to a Pop Rivet Gun to join any seams so that they become flush. Pre-drill the holes for the rivets using a 1/8" Drill Bit

Rake Drip Edge

Next install the Square Rake Drip Edge over the underlayment starting at the top. Cut the top edge at a 45 degree angle leaving the first side with some excess on the face which is flush with the fascia. This will allow the second side to sit overtop and give a cleaner look at the joint.

Have one person hold the bottom using the 8' Step Ladder while another uses the 24' Extension Ladder attached to the eave with the Ladder Lock and the 8' Straight Ladder hanging over the ridge with the Ladder Hooks with Wheels to climb to the top and screw the drip edge to the sheathing.

For additional pieces, trim the folded sections and slide the lower piece into the upper piece.

03. Roofing Panels

Start on the west side and work west to east to install the 10' 6" x 16" Standing Seam Panels. This will maximize the time you spend in the shade in the morning and evening hours.

First Panel

Measure the distance from outside of the rake drip edge to the center of the first rafter. It may be easiest to do this my measuring at the ridge where the rafters are exposed. You'll want your roofing screws to be lined up close to your rafters for strength. Mark a panel of roofing the distance you measured out from the center of the screw holes plus 1 1/8" for the hem. Then draw a line using your Plumb Chalk Line and cut it using your Shears Attachment Accessory.

Panel Trimming

Next measure 1 1/8" from the bottom of the panel and cut away the standing seam and lapped edge leaving the rest of the panel to be bent under the eave drip edge. When cutting the standing seam leave a small amount on one side to fold in front of the exposed seam gap for a cleaner look.

Bending

Bend the bottom edge 180 degrees by using a 16" Hemming Tool. Next bend the trimmed side half way along the whole edge to minimize buckling and then to 180 degrees.

Installation

Slide the panel onto the roof with the drip edge sliding into the folds. Have one person hold the bottom using the 8 Foot Step Ladder while another uses the 24' Extension Ladder attached to the eave with the Ladder Lock and the 8' Straight Ladder hanging over the ridge to climb to the top and screw the panel in using one of the panels manufactured holes. Screw the bottom in using the Battery-Powered Impact Driver and 1" Pancake Head Woodscrews and work your way back up using the recommended fastener scheduling from your manufacturer.

Repeating Panels

For the remaining panels prep them by trimming and bending the bottom edge. Then slide the standing seam along the edge of the previous panel with the end sliding under the drip edge. Use the Rubber Mallet to snap the seam into place at the bottom and place the first screw in at the bottom to hold the panel in place. Next snap the rest of the panel into place as you work your way towards the ridge. Once it's snapped in place screw the panel in and move on to the next one.

Last Panel

For the last panel, snap the bottom on and rest the seam on the lock edge so you can draw a line using the drip edge on the panel as your guide. Take the panel down and measure 1 1/8" out from the line and mark it with your chalk line. Cut and bend the edge before sliding and snapping it into place. Close the bends as desired using a 3" Hand Seamer. Repeat these steps for the other side of the roof.

04. Vented Ridge Cap

Angle Guide

To insure the bottom pieces are at the right angle, make a guide out of two 2x4s by screwing them together at their ends to make a 45 degree angle V and cut it so the inside of the guide matches the size of the ridge cap. This will allow you to place the guide on the top of the standing seams on the ridge and mark the angle needed every few seams.

Ventilation

You made need a Caulking Gun with Sealant and Double Beaded Butyl Tape depending on manufacturer instructions.

Cap

Install the inner roof cap at the marked angles one side at a time per manufacturer instructions. You'll need longer 2" Pancake Head Woodscrews to reach the roof. The design of the ridge caps varies greatly by which manufacture you use, so follow the instructions you're given.

For the outer roof cap, slide it onto the inner cap from either side after prepping one side to slide into the other. Use pop rivets at seams to close the gap.

05. Snow Guards

Install Snow Guards on every other seam, starting at 2 feet from the Eave. and then every 2 feet until you have 3 rows. Alternate the rows so there aren't seams without guards on them.

Tools

New Tools

Item	Cost
Battery Powered 16 Gauge Finishing Nailer	327.95
Metal Snips	16.97
Shears Attachment Accessory	59.98
Pop Rivet Gun	19.98
1/8" Drill Bit	2.97
16" Hemming Tool	49.50
Rubber Mallet	4.97
3" Metal Hand Seamer	29.97
Caulking Gun	2.58
Total	514.87

Existing Tools

Item	Source
20 lb Propane Tank	Wall Structure
Large Propane Torch	Wall Structure
Butane Torch	Wall Structure
Handheld Weed Sprayer	Wall Structure
Battery Powered Handheld Circular Saw	Foundation
Speed Square	Foundation
Carpenter's Pencils	Foundation
Tape Measure	Foundation
8' Step Ladder	Wall Structure
4' Level	Foundation
Battery-Powered Impact Driver	Wall Structure
8' Step Ladder	Wall Structure
24' Extension Ladder	Wall Structure
Ladder Lock	Roof Structure
8' Straight Ladder	Roof Structure
Ladder Hooks with Wheel	Roof Structure
Plumb Chalk Line	Foundation

Supplies

New Supplies

Item	Use	#	Cost	Total
2x6x8	Eave Fascia	2	5.84	11.68
2x6x12	Eave Fascia	2	8.73	17.46
2 1/2” Galvanized finishing nails, 2500 Pack	Eave Fascia	1		24.16
3 1/2” Hex Deck Screws, 1lb pack	Eave Fascia	2	8.90	17.80
1x8x12	Rake Fascia	4	19.82	79.28
Quart of Tung Oil	Fascia	2	19.87	39.74
1 1/2” Galvanized finishing nails, 2500 Pack	Rake Fascia	1		19.90
10' 6" Plumb Eave Drip Edge Section	Drip Edge	4	22.04	88.16
1" #10 Pancake Head Woodscrews, 250 Pack	Drip Edge, Roof Panels	1		11.80
1/8" Pop Rivets, 100 Pack		1		8.65
10' 6" Square Rake Drip Edge Section	Drip Edge	5	22.04	110.20
10' 6" x 16" Standing Seam Panels	Roofing	30	26.56	796.80
10' 6" Ridge Cap Section	Ridge Cap	2	32.25	64.50
10' 6" Ridge Retainer Section	Ridge Cap	2	30.02	60.04
32" Vented Closures	Ridge Cap	15	10.80	162.00
Double Beaded Butyl Tape	Ridge Cap	1		9.06
Sealant	Ridge Cap	1		5.95
2 1/2" Pancake Head Woodscrews, 250 Pack	Ridge Cap	1		25.34
Standing Seam Snow Guards	Roofing	46	14.03	645.68
Total				2,198.20

Existing Supplies

Item	Use	Source
Tung Oil	Fascia	Wall Structure
Rags	Fascia	Wall Structure
Butane Canister	Fascia	Wall Structure