How Much Should Roof Tiles Overlap

One estimate illustrates the importance of the price difference.

How much should roof tiles overlap.

This is normally specified with the tile manufacturer and it s advisable to check how much they say a roof tile should overlap normally on a smooth faced tile the overlap is 75mm 3 and on granular or sandfaced tiles its 100mm 4 however if the roof is shallow pitched is facing a windy direction or will be prone to moss build up it may be a good idea to increase the lap by another 25mm or 1. To place a concrete tile roof on a fairly common home with a roof area of 1 500 square feet could cost between 6 000 and 15 000. The tiles going up the roof are normally directly above each other there is no need to stagger them as the side joints are automatically sealed by overlaps. Either enter a positive value to if there is a gap between the tiles being used or a negative value if the tiles overlap.

Here phil explains how much overhang a roof should have at the gutter. Jord86 screwfix select 3 75mm standard on a low pitch or high wind area increase the lap to 4 100mm. The bottom tile or slate of the roof covering should project at least half way into the gutter the ideal distance is between half way and two thirds of the way over. Setting out up the roof gauge set the first batten at eaves to allow the tails of the eaves course tiles to overhang the fascia by 40 to 45mm ie.

Here phil explains how much overhang a roof should have at the gutter. The roofing calculator can account for both of these situations. Set the last batten at the ridge so that the ridge tiles will overlap the top course of tiles by at least 75mm. Although overlapping felt more than 2 inches may provide extra protection the 2 inch overlap is adequate for most applications and will provide an excellent roof.

Tile size can range anywhere from smaller mosaics that are 3 8 to 24 48 slab tiles and everything in between. Just short of the centre of the gutter. The top part of each tile is covered by just one tile. Therefore use a 2 inch overlap for roof felt.

The additional overlap may only create problems when installing the shingles and felt over the roof structure. This layout gives a single lap covering i e.