This guideline provides information on the selection and design of FRP systems limited to externally bonded FRP laminates and near-surface-mounted FRP bars/strips for increasing the in-plane and out-of-plane strength of existing ungrouted@ grouted@ or partially grouted URM walls; infill walls are not included in this guide. The guide is applicable to URM structures made of clay bricks@ concrete masonry units@ and natural stones using conventional types of mortar. For masonry with significant deterioration@ questionable mortar bond@ and cracking and/or element displacement@ traditional procedures may be required as well as FRP strengthening. The evaluation for the need to apply traditional modes of strengthening is not covered in this guide.