A manual of face brick construction
Part 2
Taking it all in all, you can tell your clients that in building a face brick house, they get more completely than in case of any other material the structural values of permanence, fire-safety, comfort and health, and the artistic value of beauty, out of which follow a real economy and a genuine personal satisfaction. What, then, are the facts about the real economy of a face brick house? To begin with, we frankly admit and, in fact, assert that such a house costs more than the less substantial frame or stucco house,--as it ought, because it is worth more. It wears better, it looks better, it sells and rents better. You can never get something for nothing. You have to pay for it. But what we can show from actual figures is that the face brick house at the start costs only a little more than the frame or stucco house and in the end, when all the bills are paid, costs much less. It is a question of initial and final cost. Let us first look at the initial cost.
The Test of Figures
The accompanying table gives the results of actual figures obtained during the past ten years from all parts of our country by face brick manufacturers. As the prices of material have changed greatly, during the period in question, the percentages of difference will prove to be the only instructive figures, and are calculated on the total costs of the houses. The bids for 1919 we have in our files for reference and we are ready to show them to any interested person. As frame construction is generally the lowest, we take it as the base of comparison and give the percentage in excess over frame for (1) a solid, 8-inch brick wall, or face brick on common brick backing; (2) a brick veneer wall, or face brick in place of clapboards or shingles on frame; (3) a face brick on hollow tile wall, 8 inches thick; and (4) a stucco on frame wall.
A moderate sized 7-room dwelling is used as a typical example and is the same in every respect, except the exterior wall construction. First class face brick are used and the solid wall is furred.
Table of Percentage Differences
1 2 3 4 _Year_ _Frame_ _Brick_ _Veneer_ _Tile_ _Stucco_ ---- ----- ----- ------ ----- ------ 1910 0.0% 9.1% 6.9% 10.7% 2.9% 1913 0.0% 8.1% 5.9% ..... 4.0% 1915 0.0% 6.9% 4.9% ..... 1.6% 1919 0.0% 5.1% 4.4% 6.5% 0.1%
These figures represent from nine to twenty-two bids in each case, on which the average is given. Different contractors in the same place and different parts of the country sometimes show considerable divergence, but in view of the wide territory from which these bids have been gathered and the time covered, the averages may be taken as indicative of about the constant percentage of difference in initial cost.
The Face Brick House Saves Money
It should be noted, in the case of the 8-inch solid brick wall and the brick on tile wall, that they are both over two inches thicker than the frame or stucco wall. But taking the 8-inch face brick solid, or hollow tile, wall as a fair comparison with frame and stucco, you can readily calculate what you really save by paying a little more at the start for the more substantial construction. Reverting to the economies of the face brick house you will find that the maintenance and depreciation items alone on the frame construction will, in a very few years, entirely wipe out the 5 or 6 per cent excess initial cost of the brick, to say nothing of all the other items that go to make your face brick home all the time an investment of a permanent and remunerative value.
Thus, a $7,000 frame house would mean, figuring excess cost at 6 per cent, a $7,420 face brick house. Depreciation at the lowest estimate of 2 per cent annually on the frame in five years would be $700; add to this a repainting bill of $250 and you have a total of $950. For the five years under consideration there would be no depreciation at all to be calculated on the brick house, but a repainting bill of about 385 for doors, windows, and outside trim would have to be charged up. This means that the difference of 3865 between frame and brick upkeep or maintenance covers, in five years, more than twice the $420 excess initial cost of the brick. You may well suggest to your client that to be penny wise and pound foolish in building a home looks like an inexcusable folly. As you are his trusted adviser in all such important matters, you can not avoid your obligation of giving him the advice best suited to his interests.
Lumber Enters into the Problem
Please note in the figures of the table the decided tendency toward a diminished difference of percentages. The probable explanation is the rising price of lumber which has, from all accounts, by no means reached its crest, and which is forced by the tremendous demand now being made for that material in the world markets. Lumber is one of those staples of such wide and varied use that it is well to consider seriously its conservation, both in guarding its supply and in maintaining a reasonable price. We are all interested, for everybody at one time or another uses some form of lumber.
Need of Saving Lumber
However wide and varied the normal use of lumber may be, it is at the present time, due to the conditions in which the great war has left us, subject to abnormally excessive demands and will be for a period of years to come. When you consider that even in fireproof homes built of concrete, stone, or brick, lumber bears from 20 to 25 per cent of the cost of the building, and that now 80 per cent of the houses in the United States are built entirely of wood, you can easily guess why so much used to be said, even in pre-war times, about the disappearance of our forests and the advancing prices of lumber.
The Wastes of War
But picture what the war has done, and its inevitable effect upon the demand for lumber. According to a comprehensive report on the _Direct and Indirect Costs of the War_ recently issued (November, 1919) by the Carnegie Endowment for International Peace, the direct cost to the warring nations amounts to 186 billions, of which the property loss on land was thirty billions and on sea seven billions. To this must be added forty-five billions as loss of production. That is, not only were vast amounts of property destroyed, but the normal supply was greatly lowered. Take the matter of houses alone, not only were great numbers of them destroyed in the warring zones, but neither could they be replaced, nor could the new houses be built which were normally required by the community. Fortunately for us in America the war destroyed no property, but for a period of two years it prevented normal building to the extent of hundreds of thousands of houses. As a consequence, in Europe all the waste places must be rebuilt and, in both Europe and America, new houses in great numbers must be erected to catch up with normal requirements. There is a house famine the world over.
The Lumber Burden of America
Where is all the needed lumber so lavishly used in building to come from? The average normal supply would not be sufficient and the supply cannot be increased for a period of years simply because Russia, which normally supplies 50 per cent of the lumber for the European markets, has fallen into such industrial chaos, and needs so much material for her own reconstruction that, according to one authority, she will not be able to export lumber again before 1922 or 1923. In consequence, the burden of supplying lumber to the world market at the present time will fall upon America. The effect upon prices, as well as upon quality of product, will be inevitable. The excessive demand will not only compel injurious denudation of our forest lands, but will more and more force the cutting of inferior timber.
How to Save Lumber
In view of such conditions there is urgent need of conserving our lumber supply by every available means, the simplest and most direct of which is to confine lumber strictly to its legitimate uses or, at any rate, not use it where more fitting materials are at hand. Take the abnormal demand pressure off lumber in every possible way, and we reduce the danger of a lumber famine that threatens us for some years to come. Thus, lumber should not be used in the exterior walls of a house, where it is exposed to the vicissitudes of the weather or to the trial of fire, especially when building material such as brick, which is nearly as cheap, and considering its durability and fire-safety, far more economical, is everywhere in evidence.
Lumber has its very legitimate and varied uses, but among them is not outside work where wind and rain and frost and fire search out its weaknesses. In view of its very nature and the great variety of its proper uses, it should never displace the exterior masonry wall, which in stone, tile, or brick makes the most secure and enduring structure. If the 80 per cent of building in this country, now done of frame, were put into brick, or other durable and fire-resistive materials, it would result in a great economic national gain, people would have better and more substantial houses, and the lumber which everybody needs would be conserved for the legitimate uses to which it is admirably adapted.
TYPES OF FACE BRICK WALL
There are three possible ways of using face brick in building a wall, determined by the backing up material employed, each of which will be given special attention in the following pages.
[Sidenote: Solid Brick]
First, there is the solid brick wall, consisting of face brick with a common brick backing. Of the strength, permanence, and structural value of this construction there can be no question. Objection is sometimes made to its cost but, in view of the facts we give later, this objection loses its force and proves to be a claim of actual economy. The only other objection heard is that of the dampness of the wall. This comes from one or both of two causes, pervious mortar joints, or sweating due to condensation of interior moisture on the cooled wall. Either condition may be completely overcome by furring the interior wall surface, a method recommended in this Manual, and provided for in the plans offered. The furring provides an air space that insulates against dampness and cold. With this furring, the other methods, sometimes employed, of mixing so-called waterproofing material with the mortar or of using colorless liquid waterproofing on the surface of the brickwork are not necessary. Even the furring, in certain climatic conditions as proved out by local experience and practice, is not needed. But in any case, it must always be seen that all the exterior joints of the wall, especially the head or vertical joints, are solidly filled with mortar. The possibility of efflorescence, which occasionally appears on the surface of the brick when the outside of the wall has been subjected to excessive moisture, may be prevented to a great extent by avoiding such ledges and projections in construction as permit the soaking of water into the surface of the brick work. See Glossary, page 110.
[Sidenote: Hollow Tile Backing]
Secondly, the face brick wall may be built by using hollow tile in place of common brick for backing. This wall, like that of solid brick, being all of burnt clay, has the advantage of being fire-resistive, although insurance rates are not always as favorable because, in case of fire, the salvage is not as large as with the solid wall. Some builders prefer this type of wall, claiming that it is less expensive to build and that the hollow dead air spaces act as a heat insulation, giving a drier and warmer wall. On these points we have no means of forming a definite, final opinion. Your best plan would be to consult both the common brick and hollow tile people so as to form a judgment of your own on the subject. Either wall is sound construction and will give you entire satisfaction.
[Sidenote: Face Brick Veneer]
The third type of wall, known as veneer, is simply the application of face brick to the wooden framing of a frame house, in place of the clapboards or shingles. Although, as a substantial or a fire restrictive wall this type is not equal to solid brick or hollow tile, it has its friends among builders, largely on the score of local custom, familiarity, speed of construction, and cost. What it has to recommend it is the fact that in outer appearance and value it is a brick house, and in reality a big step in the right direction. But whichever type of wall you build, it is the face brick that gives to it character, distinction, class, all of which means not only deep personal satisfaction to the owner, but real money in higher rental or sales value, far in excess of the initial cost of the face brick over poorer and less attractive material.
[Sidenote: Weakness of Frame]
Take the frame wall. Where it is exposed to the weather, it shrinks, decays, and depreciates, requiring repeated paintings and repairs. Now substitute, at an added cost of only 4 or 5 per cent, a fine face brick for the drop siding and at once there is practically cut out painting, repairs, and depreciation. The brick veneer has surrounded the house with a solid, monolithic, permanent, windproof, shell of fireproof material, so that in consequence the owner has on the exterior, to all intents and purposes, the strength and beauty of a face brick house. Besides his own personal satisfaction, he has added many times more than 4 or 5 per cent to the market value of his property. Or, suppose your client has an old frame house that is built on a good plan, but outwardly grown dilapidated in appearance and hard to rent or sell. Induce him to veneer it with an attractive face brick, as we explain on a later page, and for every dollar he puts in he will get two out.
[Sidenote: Weakness of Stucco]
Then take hollow tile wall construction and compare the value of it finished with stucco or with face brick. The face brick will cost from 2 to 3 per cent more on the cost of the house, but what will it give the owner in wear, appearance, and solidity of construction! If you stucco hollow tile the interior face of the wall in most cases must be furred. If you use face brick, not only additional solidity and strength are added to the wall but if, as we recommend throughout this Manual, an air space is left between brick and tile, the inside furring is not needed. Besides, stucco is apt to stain, crack, or, in damp climates with freezing weather, peel off in spots, presenting an unsightly appearance. You can assure your client, who is debating between stucco and face brick, that years of usage will prove the brick surface to be both in artistic appearance and actual economy by far the better investment. It costs a little more at the start, but is worth much more in the end.
[Sidenote: Value of Looks]
Or, it may be that your client concludes to build a thoroughly good solid brick wall, but wants to save 3 to 4 per cent on the total cost of the house by using common brick throughout. This will be a good wall, no doubt, but how will it look! Common brick are not made with an eye to external appearance; their great merit lies in solid structural value. Occasionally a well-burned selected common brick, made of a clay that burns to a good color may be found and used, with proper care of bond and mortar joint, for facing purposes; but as a rule, the method of manufacturing common brick, and the structural uses for which they are intended do not contribute to the attractiveness of the wall surface. Hence, the natural development of the great face brick industry which adds to the solid structural merits of brick the invaluable merit of looks.
And how much do looks have to do with both the sentimental and commercial value of a house! What does the good wife think of the looks of the house she lives in? What do the neighbors think of it? And to be purely practical, what does the prospective renter or buyer think of it? You know that when a man wishes to sell his house, he cleans up the yard, repairs the fence, patches up the holes, and paints the house from top to bottom because he knows the value of looks. He knows that his restoring the house to its pristine glory attracts the purchaser, helps to persuade him, and secures a far better price of sale.
Cleanliness, looks, beauty, have a very real value in dollars and cents. The same principle applies to a face brick finish of the wall surface. Face brick are made with more care, are handled and shipped with more care, and laid with more care, just for the purpose of producing a more attractive wall. When you use face brick for your clients, you give them the last word in wall construction, which is at once, as no other material, strong, enduring, comfortable, fire-safe, economical, and beautiful.
PUTTING IN FOUNDATIONS
The following data have been compiled and the drawings made by Mr. George W. Repp, a Chicago architect, and are based on the most widely followed building practice.
There is no intention of trying to inform the master mason or the master carpenter about his craft with which he is perfectly familiar, but to show the master carpenter builder the best methods of handling the brick problems that may confront him in solid brick, hollow tile, and veneer wall construction. A glossary of technical terms will be found at the close of this volume.
[Sidenote: Footings]
Whatever type of construction is chosen, solid brick, hollow tile, or veneer, it should rest upon a solid brick foundation. In the majority of cases, where soil conditions are favorable, the brick foundation walls of moderate sized houses do not need a footing except at points bearing concentrated loads. Naturally, the excavation should be carried down to good solid earth, free from loose, spongy soil or filled-in ground which might later permit sufficient unequal settlement to result in serious cracks throughout the wall of the house. Where conditions seem to require a footing, it may be either of brick laid in good cement mortar (Fig. 1) or of concrete as shown in our working drawings, and should be strengthened at points of special bearing stress. Which footing is chosen will depend largely on convenience of getting local material and labor. The bottom of the foundation wall or footing must always be below frost line which, of course, varies in different sections of the country; and this rule applies as well to all brickwork outside of the foundation wall proper.
[Sidenote: Drains or Drainage]
Where the conditions of soil require, porous tile with open joints should be laid around the base of the foundation wall, not above the level of the basement floor nor below the bottom of the wall or footing, and slightly pitched to a point where it may be connected with the sewer or some natural outlet. Where this tile is laid in loose sandy Soil, the open joints should be wrapped with building paper to prevent the sand from clogging the drain. In heavy clay soil, the tile should be covered to the depth of about a foot with crushed stone to prevent packing of clay around the tile.
[Sidenote: The Wall]
Foundation walls, technically speaking, are those walls below the grade line of the building that support the super-structure. Similar walls around areas are termed retaining walls and are not properly a part of the foundation. The thickness of foundation, as well as other walls for different structures, is usually established by ordinance in cities and towns; but, where there are no ordinances on the subject, a brick foundation wall of 12 inches, for two-story buildings, or one of 8 inches, for small one-story buildings, conforms to good practice.
[Sidenote: The Bond]
The foundation wall should be built of a hard-burned common brick, and laid in Common Bond (See Fig. 47), with a good cement-lime mortar, starting at the bottom with a header course. As the headers, which serve as transverse bond, are not long enough to extend through the entire thickness of the 12-inch, as they do through the 8-inch wall, the header courses in the 12-inch wall very naturally cannot be on the same level at the front and back of the wall. In the bottom course, the header row is laid inside and the stretcher row outside, while in the next course above the position is reversed, and so on wherever the bonding header courses come.
[Sidenote: Laying the Brick]
The first course of brick is well bedded in mortar on the footing or the solid ground, as the case may be. At the corners and at proper intervals along the wall where necessary, a few brick, four or five courses high, are laid up in the advance to serve as leads or starting points for the bond and supports for the line which guides the mason to the proper level and alignment of the brick. The mortar is well spread with the trowel along the top of the brick course, and the brick to be laid is firmly pressed down on this mortar bed next the lead. The mortar thus squeezed out of the joint is cut off by the trowel and scraped on the head of the next brick to be laid which is then pressed on the mortar bed and shoved against the brick just laid, so as to squeeze mortar into the bottom of the vertical or head joint which is then thoroughly filled from the top by slushing with mortar. The stretcher courses for structural reasons should be well slushed with mortar between the front and back rows or tiers of brick, laid to break joint.
As the work progresses, the joints on the inside face of the basement wall should be neatly struck, while the outside joints should be cut flush for receiving a waterproof coating. The inside joints are struck by running the point of the trowel, held firmly at an angle, along the upper or lower edge of the brick, thus making a smooth beveled joint (See Fig. 57).
The wall should be widened where indicated on any plan to serve as a foundation for the fireplace, and should be built hollow to provide for an ash pit. Where other chimneys occur, the wall at their base should be corbeled out to serve as a support for them.
[Sidenote: Scaffolding]
After the wall has risen four or five feet, scaffolding is erected to carry on the upper portion. The scaffolding, necessary for the usual house, or other small building, consists of a series of rigid horses or trestles, approximately 5'-0" wide and 5'-0" high, on which are placed a half-dozen 2" × 10" planks laid close. The joists for the floor above may be used for this planking and then lifted into place when the wall is ready to receive them, thus effecting a saving in labor. Care should be taken to keep the horses several inches away from the inside face of the wall, lest the jarring caused by bricks and mortar being deposited on the scaffold may push the green wall out of plumb. The scaffolding for the foundation wall may be dispensed with, if it is found more convenient to lay the upper portion of the wall from the outside.
[Sidenote: Waterproofing]