Installing new shingles over old ones will literally save you time and money. In this case, you must be sure that the new shingles are only installed over one other layer of the old ones. Extra layers may be too heavy to support and could cause a collapse of the roof. Reroofing old shingles is one of the best options, as it saves you the trouble of having to rip off the old roof. Check out some useful tactics to apply when handling this kind of project.
What You Need
You need a ladder, roofing felt, gloves and boots, staple gun, nail gun, roofing shingles, piece of chalk, and utility knife.
Consider Professional Advice
Start by consulting your local government office on the local code of conduct governing installation of new shingles over old ones. Some areas may have building codes that may prevent this kind of installation. Going against the codes may have legal implications.
Inspect the Old Shingle Roof
Have a ladder of desired length to access your old roof. Make sure you put on proper foot wear with enough grip to avoid slipping on top of the roof. Inspect your old roof shingle for any damages before you install the new ones. Any damaged shingles should be checked for decking problems. Repairs damaged decking and reinstall the old shingle back into position.
Install Roofing Felt
The old shingles should be covered with roofing felt before installing the new shingles. Secure the felt with staples at least every six inches. In addition, overlap the layers of the felt by an inch as you proceed towards the ridge of the roof. This prevents any moisture from getting under the layer of the felt. You may consider a pair of work gloves to avoid blisters and injuries on your hands.
Prepare for New Shingle Installation
Mark a clear centre line down the shingle roof from the edge to the ridge using a piece of chalk. Use a utility knife to remove tabs from the shingles to be installed.
Install the New Shingles
To lay out your new shingle, position it with the first horizontal line. Secure it in position using four nails, with two nails placed an inch from the top, and two other nails an inch over the tabs. Repeat this process for all other uncut shingles until you complete the first row. Use the same procedure for the second row and lay all shingles as you work to the ridge until you complete the project.