Go over the sills on the north side of the building first. Here there is less sunlight and snow remains longer. Consequently decay from excessive moisture is not unusual. Roof rafters and plate beams (the long timbers on which the lower ends of the rafters rest) should also be knife-tested since long neglected leaking roofs eventually result in their decay. Unsound corner posts and other uprights connecting sills and plate beams are harder to detect since they are concealed between the outside boarding and interior plaster. Note the walls themselves and the corner boards extending vertically from foundation to eaves. If a corner of the house is enough out of plumb to be visible to the eye, or if the corner boards are loose, examine further as it may indicate decay beneath.

With brick or stone houses, the walls themselves carry the weight of the roof and so have no vertical timbers. If the walls are out of plumb it means that the foundations are either gone or are in need of major repair. Whether a house is of brick, stone or wood, there is one further place for knife testing—the ground floor joists. Cellar dampness may have taken its toll.

The fact that a sill, joist or other timber is unsound does not mean that the house is beyond repair. Many old houses with all their sills gone and some other principal beams no longer serviceable have been restored, but the necessity of such steps ought to be realized in advance and the cost taken into consideration. It is far from pleasant to discover that one has unwittingly bought the bill of expense this type of replacement means. "Let the buyer beware" generally rules in the selling of old places, and the purchase of a knife and an hour or two of poking its point into the principal timbers may save time and money later.

"The next time I buy an old house to put a new frame into, you'll know it," was the heartfelt declaration of a man who left his knife at home when he went house hunting. "The owner and the agent knew the sills and beams were rotten but didn't think it necessary to mention the fact. What I didn't see wouldn't hurt me until after I had bought the place and begun repairs. Then I learned plenty about decayed timbers and the cost of replacing them."

After the timber frame, consider the exterior. The foundation will probably need some "pointing-up," that is, replacement of mortar in the joints or cracks. The question is, how much? Will it have to be a complete job? Has frost worked such havoc that some sections must be re-laid?

If the cellar indicates standing water during heavy rains, drainage must be provided. Notice whether any cellar windows have been closed. Countrymen are prone to do this as a cheap and easy method when the framework gets beyond repair. Replacing stoned-up windows is not expensive or difficult but just one more thing which must be done. Notice the extent of the cellar. Old builders sometimes did only a partial job of excavation because of economy. Such a cellar was ample for storing root crops, preserves, and hard cider in the days before furnaces. It may be wise to complete the work of excavating. Do not expect to find cellars under wings and sheds. It was never the practice. If they are to be converted to uses for which excavation is desirable, this is another item for the adding machine.

With the foundation and its needed repairs noted, begin appraising the condition of the walls and roof. Sometimes a shingle roof will be found in good order or at most have one or two minor leaks which can be repaired. More often an entire new roof is needed and, in extreme cases, new boarding beneath. As with sills, roofs sloping to the north and east are more apt to be out of repair and for the same reasons.

If door and window frames are so loose that they can be lifted out of the side walls, the situation is serious. Putty and paint are of no avail. Rebuilding them is essential. It is extravagant business trying to heat a house with wind whistling in around doors and windows.

If the fabric of the side walls is of shingle, clapboard, or other types of wood, is the material sound enough to warrant repainting or must it be renewed? The object of paint is to close the small cracks and preserve the wood. An old house that has gone many years without painting will absorb much more than a new one, but it is surprising what can be accomplished with two or three coats of paint on siding so weathered as to seem worthless. Besides, a new exterior robs an old house of some of its charm, so preserve the old if possible, architects, carpenters, and contractors to the contrary.

Where walls are of stone or brick, the mortar of the joints has probably so disintegrated under wind and rain that repointing is indicated. Also, frosts may have heaved individual stones or disintegrated bricks so they must be reset. Expect this in places where down-spouts have leaked for years. If the walls have settled badly, lintels or sills of doors and window openings may be cracked and need renewing. Sometimes an old house has exterior walls of plaster. These are both picturesque and rare. Patch cracks and spots where it has come loose from the lath. Old plaster has a texture and patina that modern stucco cannot simulate, so preserve it if possible.