Mark I houses and subsequent models, Dartmouth, N.S.

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Mark I houses and subsequent models, Dartmouth, N.S.

DIVISION OF BUILDING RESEARCH

MARK I HOUSES AND SUBSEQUENT MODELS, DAR TMOUTH, N. S.

by

D. C. Tibbetts and D. R. Robson

P'r epa.r ed for the Research Committee of the

National House Builders As sociation

Internal Report No. 242 of the

Division of Building Research

OTTAWA December 1961

A program of study begun four years ago has led thus far to the development of three successive designs of experimental houses designated Mark I, I I, and I I I. This program has been carried out jointly by the National House Builders As sociation and Central Mortgage and Housing Corporation with the as s istance of the Division. Houses of each design have been constructed in various localities for study. Observations made by the staff of the Atlantic Regional Station of the Division on the performance of the Mark I house constructed in Halifax and of other houses constructed with only minor modifications to the original design are now reported.

The first author, a Civil Engineer and.a Res earch Officer with the Division, is Officer-in- Charge of the Atlantic Regional Station

in Halifax. His colleague and co-author is a Mechanical Engineer

engaged in studies of building performance and problems in the Atlantic Provinces.

OTTAWA

December 1961

N. B. Hutcheon Assistant Director

D. C. Tibbetts and D. R. Robson

MARK I HOUSES

The original Mark I house in Dartmouth was constructed by the Commodore Company Ltd. of Halifax in Commodore Park Sub-division, Dartmouth, at 31 Valleyfield Road (Fig. l(a)). The house was started in the fall of 1957 and was formally opened for public inspection in May 1958. This Mark I house in Dartmouth is identical in design to the Mark I in Preston, Ontario, described in DBR Visit Report No. 38. A cost breakdown of this house is included as Table 1.

The Commodore Company, encouraged by public interest in the Mark I house, erected 25 more houses with only minor changes from the original design. The roof pitch was increased from 3 in 12 to 4 in 12 slope to permit the use of ordinary asphalt shingles which were found to be lower in cost than the lower pitch using "low-slope" shingles.

To complete the project 15 more houses were built to conform with CMHC Standards. Floors were tiled throughout in this latter group; previous houses of this type had painted plywood floors except for kitchen, bath, and hall areas. The plywood floor was increased in thickness from ｾ in. to 5/8 in. and the siding from 3/8 in. to

1-

in. Joists were doubled under partitions. For this group of houses 4-ft high foun-dation walls on footings were used instead of the founfoun-dations previously used in the Mark I series. With the exception of the minor changes in-corporated by the builder, there are 41 houses of the Mark I Budget

Research Type in Commodore Park. The series was completed during

the winter of 1959-60. A general view of Commodore Park is shown in Fig. l(b).

Previous observations by Hansen and Tibbetts were reported to the NHBA Res earch Committee in January 1960 (1). Also prior to the Research Committee Meeting of January 1961 general observations based on field examination were outlined in a letter to Mr. Sawyer, a member of the Research Committee. A field examination of a number of units

was made by Hansen in May 1961 (Appendix A). Generally speaking most

problems have been directly related to high relative humidity conditions. As part of an area study of indoor climate in houses, it was decided to instrument and observe temperature and relative humidity co nd itio n s in

(1) Hansen, A. T. Mark I Budget Research House, Commodore Park

Subdivision, Halifax, N. S. National Rest: arch Council, Division of Building Research, Technical Note No. 299, January 1960.

two houses m Cornrn odo r e Park (Figs. 2 and 3) for c orrip a ris o n with two houses in another subdivision by the s arn e builders where the s arn e crawl space heating a r r an g errie nt was used. It was thought that a

useful cornpar is on could be rn ad e between this rne thod of heating and conventional s ys terns ,

General Observations

1. Condensation frequently occurs on the polyethylene fi lrn applied over crawl space walls in addition to d arnpne s s between the f iIrn and the

concrete. In Saint John where this s y s te rn is used the f iIrn is separated

fr orn the crawl space wall by i-in. furring; no condensation has been observed.

2. A nurribe r of cases of darnp and m.ouldy walls and ceilings have been observed. These conditions are rno st c ornrrio n near the intersection of walls and ceilings and in closet areas. One case was so severe that water was being collected in a pan beneath the ceiling light fixture in one of the b ed r o o rn s . In rno st cases the occupants refused to try to correct the situation by rne ans of door and window ventilation. It

should be r-e rn e rn be r e d that these are s m a l l tightly constructed houses on poorly drained sites and it has been reported that no drainage tile was used around the footings.

3. The practice of installing foundation wall insulation batts vertically frequently results in a poor job.

4. SOIne owners have either r e rrio ve d or rearranged the crawl space

ground vapour barrier so as to make it ineffective. SOIne of the rearrange-rn e nt has reportedly been due to water entering the crawl space so as

to "float" the fi Im ,

5. Occupants report low annual fuel bills. When considering this, weight should be given to the high cornbus t.io n efficiency of the heating units, the size and tightness of the houses, the absence of the b a s errie nt area, and the high relative hum idity which Inay p e r rnit lower the r mo stat settings for the s arn e degree of cornfo rt ,

6. Occupants use attic space and s ornet irrie s the crawl space for storage, indicating perhaps that ceiling joists be designed for this or that rno r e storage space be provided.

7. No opportunity was provided through repairs or additions to ex arni ne the rn at e rial s under the exterior plywood.

8. Paint deterioration on the plywood sidings does not appear to be any more rapid or frequent than on other sidings on conventional houses in the area. Moisture content of plywood from 17 pe r cent to 65 per cent has been measured.

9. An October visit as a follow-up to an earlier complaint regarding suspected fungi growth on floor joists indicated that the conditions necessary for this growth ceased to exist once the heating system was put into operation.

10. The builder has found it necessary to double floor joists under partitions to reduce plaster cracking.

11. Except for those problems directly related to high humidity conditions those brought to our attention by either the builder or the occupant are no more frequent than for conventional houses.

Indoor Climate

In addition to the two houses instrumented for continuous records of relative humidity, temperature, burner "on" time and

fan "on" time, an opportunity was provided to compare the crawl space plenum system with another Mark I house (Fig. 4) in the same sub-division where the owner had "piped-up" the system to registers to relieve some problems to do with high humidity and odours attributed to the crawl space. It was also possible to compare conditions in both these houses with an owner-built house of similar size but with a

piped-up system, no insulation on crawl space walls, a thin cover of concrete over the crawl space, and on a well-drained site.

Notes: House A unoccupied during the day Monday through Friday -no children.

House B-2 children.

Burner and Fan "On" Time (hr) for 22- Week Period Beginning December 1960 House A B Burner 592 712 Fan 706 751 Efficiency 810/0 80% Degree Days 5540 5540 Observations of burner and fan operation during the summer of 1961 indicate that the fans were not run independently of the burner to effect air changes in the crawl spaces.

Fuel Costs Obtained from Owners for the Year 1959-60 With Oil at 17. 2 cents per gal

House A - $130.00 for 7090 degree days

House B - 90.00 for 7090 degree days

Register Velocity and Air Distribution Comparisons

Between Piped-Up System and Plenum System in Mark I Houses Register velocities for the two houses are indicated on the floor plan (Fig. 5) of the Mark I house in this report.

Room Temps Temps 12" from Wall Differential

System Grawl Living Floor 4' Level Ceiling Floor to Ceiling

Space Area Piped 65 72 770 790 ₈₁ 0 40 Plenum 69 72 740 780 800 60

Air velocities at the ceiling near the wall ceiling intersection and in corners with the piped s y ste rn as co rnp a r e d with the p l e n urn s ystern are higher although the register velocities for the piped s v s te rn are lower. There is also slightly less tendency for stratification

with the piped sys tern:

F'r orn the co rrifo rt point of view, it is difficult to distinguish between the two s ystern s provided general hurn idific a.ti on fr orn the crawl space can be controlled. The piped s ysterr. was installed to help reduce odours and rno is tur e entering the living area fr orn the crawl space. It is apparent that this change did rnu ch to correct the p r ob l e rn and could be considered an irripr o vern e nt where poorly drained site conditions

exist.

Graphs based on absolute hurn idity showing c orrip a ris ori between the Mark I houses and an independently constructed house (designated "XII) with a crawl space are included in Fig. 6.

SUBSEQUENT MODELS

Following c ornp letion during the winter of 1959 - 60 of the Mark I series, the Co rnrn od o r e Cornp any started their !lew subdivision known as T'arn O'Shanter Ridge. Site conditions were very different than at Corrrm od o r e Park and generally the new subdivision is located on high ground and is a well drained site serviced by rnunic ip al water supply and sewer.

To date there have been 92 cornp.le ti ons In Tarrl O'Shanter and present starts nurrrbe r 27.

In Tarrl OIShanter a nurn be r of changes have been introduced by the builders that can be cons idered i.rnp r ove rne nt s over the Mark II s In Cornrn od o r e Park.

1. Over-all size has been increased to provide a floor area 24 by 40 ft with the exception of the "Heather" rnode l which is 26 by 40 ft. 2. Architecturally, a variety of siding and carport a.r r an g ern e nt s have been used. So me brick veneer has been used on front elevations up to window sill level and s orri e flat-roofed carports introduced (Fig. 7). The application of plywood strips applied horizontally, original batten tr e a trrie nt u.sin g plywood, and a variety of colour s cherne s together with various a r r a ng e m e nt s of house plans on the lots have served to create an attractive subdivision (Fig. 8).

3. After app r ox irna.te Ly the first 40 units were built in T'arn O'Shanter, a revised foundation detail (Fig. 9) which e Iirn inat e s the original

asbestos c errie nt skirt has resulted in cost savings and the need for fewer steps fr orn grade to floor level. This was m a de possible by facing the end of the floor joists with a 4-in. thick block on top of which the plate for the wall f'r arnirig is attached (Fig. 10). In essence the floor s ystern is lowered into the foundation wall so as to COIne flush with the top of the foundation on the outside face. Foundation wall heights and the practice of using footings has not changed except where rock is intercepted at a lesser depth.

4. More recent rno de Ls COIne equipped with a l urninurn p rirn e windows and s to r m s .

5. Floors are tiled throughout.

6. Heating, fr orn a noise point of view, has been irnp r ove d by the provision of rn o r e return air, the introduction of outside air to the return air side of the unit, and the use of sound insulation in the return air ductwork. The introduction of outside air is a recent de v e Ioprn e nt and was not used in any of the houses ins tr urne nte d. The concrete slab previously used to support the furnace over the p Ie nurn has been replaced by an asbestos c e rrie nt sheet together with a specially designed base

that c orn e s with the type of hea ting unit now being us ed. This new unit reportedly contributes to the over-all quieter operation of the heating sys te m ,

7. Trus ses have been used but found to be les s e co norn ic a.l than con-ventional roof f'r arning s y ste rn s ; however, trusses have not been used since the tirn e the builder substituted drywall for plaster. There is the possibility that trus ses would have a cos t advantage over conventional f'r arn irig when drywall is used.

8. Two-foot batts are now applied horizontally on the walls of the crawl space resulting in a better insulation job than could be had by vertical application; however, wetting on the surface of the polythene applied und e r the crawl space insulation still occurs as does wetting between the polythene and the concrete.

9. Attic and crawl space hatches have been located to provide access

fr orn the outside storage areas.

10. Exterior latex paints have been tried and their pe r fo r rnaric e will be observed.

11. Clean outs and drip pans have been installed in conjunction with the prefab chimney to eliminate a previous problem with water leaking into the furnace room via the joints in the connector pipes.

12. Complaints and/or problems from this newer subdivision are infrequent.

Indoor Climate

As with the Mark I units, two houses in Tam O'Shanter

have been similarly instrumented for comparison purposes (Figs. 11, 12). Notes: House C - 2 children

House D - 2 children

Burner and Fan "On" Time (hr) for 26-Week Period Beginning December 1960 House C D Burner 1,006 918 Fan 1,645 1, 159 Efficiency 79

%

78.5% Degree Days 6010 6054 There is no indication from records that the fan was run independent of burner for crawl space ventilation during the summer months.

Fuel Costs Obtained (approximately) from Owners for the Year 1959-60 With Oil at 17. 2 cents per gal

House C - $140.00 for 7090 degree days House D - 130.00 for 7090 degree days

A graph based on absolute humidity showing comparison between the two newer models and an independently constructed house (designated "x") with a crawl space is included as Fig. 13.

A floor plan of the new models in Tam O'Shanter is included in this report (Fig. 14).

Crawl Space Conditions -- Weekly Averages Recorded for a 3-Week Period Beginning December 1, 1960

Week House C House D

No.

OF

R.H. gr/lb of R.H. gr/lb

1 70° 58. 3% 63.0 77° 45 % 62. 3

2 73.5° 53.5% 67.9 81° 40. 5% 64.4

3 69.5° 54. 5% 59.5 76. 5° 43. 5% 59.5

CONCLUSION

Outside of the normal inquiries rece ived common to convention al houses in this area the problerns reported or observed in the Mark I series have been directly related to conditions of excess ive humidity. It has

been observed during periods when the water table is high that water is present in a number of crawl spaces. It has been further observed that

crawl space vapour barriers are frequently disturbed either intentionally by the owner, accidentally by attempting to use the areas as storage, or by water "floating" the polythene sheet. It can be said that to date very few problems have arisen in the Tam O'Shanter subdivision of the type most common to the Mark I ser ies such as wet walls, wet ceilings, heavy condensation on windows and mould growth on interior cladding and

furnishings.

While humidity conditions are generally higher in the Mark I series, there does not seen, to be enough ora difference to account for the problems arising there that have not been observed or reported in the newer houses. The possibility of lower wall and ceiling temperatures in the Mark I houses might serve to explain the small difference in R. H. in that surface condensation on windows and walls would serve to reduce the R. H. of the air in the rooms. It would be useful to have some arrange-ment between the builder and owners for the removal of exterior plywood to afford an examination of conditions inside exterior walls of the Mark I series.

From the observations made it would appear that the practice of using vapour barriers beneath the crawl space wall insulation should be discontinued. In general it can be stated that the awl space plenum heating system is not suitable for houses built on sites where ground water can enter the crawl space. If the crawl space can be kept dry, this method of heating seems to compare favourably with piped systems both from an operating cost point of view and with regard to comfort conditions.

The observations and records contained in this report are

only possible through the co-operation of the owners and more particularly of the Commodore Co., and it is believed that the architectural and struc-tural changes introduced have greatly improved on the original des ign.

TABLE I

COST BREAKDOWN - STANDARD BUDGET RESEARCH HOUSE COMMODORE PARK

64.04 54.04 10.00 Application Fee - C. M. H. C.

County of Halifax - Water Excavation, Fill, Grading Foundation Land M

Materia l s

Plastering Land M Plumbing

Heating

Electric- Fan- Fixtures Sanding Floor s Labor Lumber Oil Septic Tank Painting Supervision - Legal

Overhead - Financing - Mortgage Insurance Profit Total Lot SPECIAL MODEL Std. Model 4 Closet Doors Porch

Mortgage and Mortgage Insurance Down Payment

Monthly Payment 25 years Taxes

Total Monthly Payment

35.00 50.00 387.16 322. 79 1, 691. 00 410.00 712. 79 575.00 276.60 51. 04 1,165.00 744. 34 53.42 238. 85 117.01 240.00 330.00 400.00 $ 7,800.00 2,100.00 $ 9,900.00 $ 9,900.00 95.00 105. 00 $10,100.00 8,445.60 $ 1,654.40

$

$2,880.00 Salary required to qualify for Budget Research House. Weekly Wage - $55.40

TABLE II

MARK I HOUSE

INDIVIDUAL PSYCHROMETER READINGS

Relative

Absolute

Ter,);porature

Uwni,Sli ty

Humidity

House

Date

C .. S.

ｌＮｉｾ

.•

C.8.

L.A.

C.S.

r..«.

-34

Louisburg

Sept.

66

0

70°

ＷＱｾｾ

6':1

_{ｾ .ll/v}rtd

_67.9

_70.7

1959

0 0 ＸＵｾＧｾ

71

d ｌｾＵ

Spikenard

II

65.1

69.8

la

79.1

78.LI

ｌｾＵ

Louisburg

Dec.

72

0

70

0

50;b

6L}%

58.1

70.7

1960

ｌｾＩ｟ｽ

LouisburC;

_"

₇₁

0 _ＵＰＷｾ

_56.7

33

Spikenard

Jan.

65

0

₇₂

°

56%

1,

r

2°1

I;)

_50.4

_ｌｾＹＮ

₇

1961

47

II

₆₉

0 0 ＴＴｪｾ ｾＵ､

Louisburg

₇₂

• IV

46.2

52.5

ｾＮＱ

LouisburG

Feb.

₇₁

0

52;;

58.8

1961

Note:

Absolute HUlnidity

:=

grains of 1'later per Ib of dry

air

CoS.

=

CraHl Space

TABLE III

MARK I HOUSE

INDOOR CLIMATE DATA BASED ON 26 WEEKS CONTINUOUS READINGS

LIVING AREAS

(Weekly Averages Beginning December 1960)

House

I\.

House B

Heek

41

Spikenard

ｾｌｏｕｉｳ｢ｵｲｇ

No.

Ter.lp..!. TI.H.

e

_{r / l b •}

Temp.!.. B. E.

flr/lb.

1

67.5

53.5

53.2

66.0

59.0

56.0

2

68.0

54.0

56.0

66.5

58.5

56.0

3

66.0

68.0

65.1

67.5

57.0

56.7

4

68.0

71.0

73.5

67.0

66.5

65.1

5

69.5

Lt6•

O _ｌｾＹＮ

0

_65.5

_{ＵＱｾＮＵ}

_51.8

6

70.1

ＴｌｾＮＰ

11·9.0

67.0

55.0

53.9

7

Ｖｾ

.•0

ｉｾｯＮｯ

35.7

68.5

53.0

56.0

8

71.5

40.5

I-l6.9

66.5

53.5

52.5

9

70.5

36.0

38.5

66.0

ｌｾＳＮ

0

ｌｾＵＮＵ

10

70.5

37.0

39.2

68.0

_ｾＮＷ

.5

It

7.6

11

66.0

_39.0

_37.1

67.0

50.0

_49.0

12

69.0

ｌｾＲＮＵ

1+5.5

62.0

ＱｾＱＫＮ

0

36.4

13

67.0

45.5

ｉｾｾＮ

8

62.5

_{ＴｾﾷＮＵ}

37.8

Ｑｌｾ

60.0

47.0

35.0

61.0

46.5

ＳＶＮｾＮ

15

67.5

51.5

51.8

16

60.5

ＱｾＵＮ

0

35.. 7

69.0

52.0

56.0

17

63.5

46.5

39.2

18

67.5

45.. 0

ＱｾＵＮＵ

19

66.0

53.. 0

51.1

63.. 5

50.5

_4I-j·.l

20

67.0

52.5

52.5

68.5

53.5

56.0

21

68.0

_{.; L_,-/}ｾＧＩ c'

_53.9

_68.5

_56.5

_53.1

22

23

_71.5

_51.5

_59.5

Ｒｌｾ

71..15

52.. 5

61.9

25

68.0

52.5

51!.•

e

26

ＷＲｾＰ

56.5

6t:.•L!

TABLE IV

MARK I HOUSE

LIVING AREAS WEEKLY

MAXIMTlfvT

R.H. WITH CORRESPONDING

of

House A House B

"lJeek

hI

Spikenard

It7

Loud

sbur-g

NO:

Temp.

n.

H.

c;r/lb.

Temp. 11. II.

e

_{r / l b •}

1

70.0

62.0

69.3

61.j..0

63.0

57.4

2

72.0

60.0

70.7

68.0

69.0

70.0

3

66.0

77.0

72.8

70.0

63.0

70.0

1.j.

72.0

70.0

82.6

68.0

66.0

67

0 2

5

76.0

55.0

71.j..2

67.0

62.0

61.6

6

70.0

57.0

62.3

70

0 0

62.0

69.3

7

70.0

_{ｾＭＵＮＰ}

It9.7

70.0

63

0 0

70.0

8

72.0

50.0

58.8

70.0

58.0

63.0

9

72.0

1.1 0• 0

46.9

68.0

59.0

60.2

10

72.0

ｾＭＵＮＰ

52.5

69.0

56.0

59.5

11

75.0

ｾ｟ＶＮＰ

60.2

70.0

60.0

65.8

12

69.0

53.0

57.11

62.0

50.0

41.3

13

68.0

60.0

60.9

6Lf·0

55.0

ＡｾＹＮ

0

Hj. _ＶＱｾＮ

0

58.0

51.1

62.0

52.0

ＱＮｾＳＮｾ

15

69.0

60.0

63.1

IE

60.0

58.0

44.1

71.0

60.0

67.9

17

6Jj..0

51.0

_{ｌｾＵＮＵ}

18

7h.o

55.0

69.3

19

67.0

68.0

66.5

66.0

56.0

53.2

20

68.0

60.0

60.9

65.0

62.0

58.1

21

72.0

58.8

68.6

70.0

62.0

69.3

22

23

70.0

58.0

63.0

24

70.0

60.0

65.8

25

7Lj..0

60.0

7Lj..9

26

71.0

63.0

72.1

TABLE V

INDOOR CLIMATE DATA BASED ON

26

WEEKS CONTINUOUS READINGS

LIVING AREAS

(Weekly Averages Beginning December

1960)

House C

Ilous e D

l-Jeek

₃₃

Hannoch

5

Hannoch

No.

Ter::!E..!. R.II.

uL

1b

_{_!. "'--'--"--}Tenp) • 11. I-I.

gr!lb.

I

_67.5

63.0

63.7

65.5

56.5

53.2

2

3

66.0

1+4.5

42.0

65.5

59.5

55.3

4

66.5

45.0

ｾＮＳＮＴ

65.5

58.0

58.0

5

66.0

41.5

39.2

69.0

Ｑｾ

7.0

ｌｾＸＮＳ

6

66.0

42.5

40.6

6900

ｾＸＮＰ

51.1

7

ＶＱｾＮＰ

41.5

36.'-l-

69.5

ｌｾ

7.0

49.0

8

61

1.•.

r;

42.5

38.5

68.0

ＱｾＵＮ

0

45.5

9

_65.5

36.0

32.9

71.0

ｾＴＮＰ

50.LI·

10

66.0

ＳＱｾＮＰ

32.9

70.5

ｌｾＲＮ

0

48.9

11

66.0

39.0

37.1

72.0

ＱｾＰＮＵ ｌｾ

7.6

12

66.5

38.0

37.1

67.0

43.0

42.7

13

67.0

ｾＮＲＮＰ

42.0

69.5

42.0

ｌｾＵＮＵ

14

66.0

38.0

ＳＶＮｌｾ

69.0

11.0.5

43.4

15

62.5

31

!.•

0

29.4

69.0

41.5

ｌｾＴＮＱ

16

66.5

35.0

33.6

67.5

ＴＱｾＮ

0

44.1

17

66.0

34.0

32.9

69.5

42.5

45.5

18

66.5

37.5

35.0

70.0

47.5

51.1

19

67.5

38.5

37.8

68,,0

49.5

ＵＰＮｌｾ

20

69.0

38.0

ＱｾＰＮ

6

68.5

52.0

ＵｌｾＮ

6

21

68.0

38.0

38.5

6805

51..5

53.9

22

69.0

ＱｾＰＮＰ

42.0

69.5

53.0

58.1

23

69.0

ＱｾＰＮＰ

1+2.0

69.0

52.5

57

Ｎｬｾ

24

69.5

ｬｾＵＮＵ ｝ｾＮＹＮＰ

69.5

59.5

63.7

25

69.5

46.0

ＱｾＹＮＰ

68.5

59.0

61.9

26

68.5

1!.5.0

],6.9

60

_u.;>r:'

_58.0

60.2

TABLE VI

LIVING AREAS WEEKL Y MAXIMUM

R.R.

WITH CORRES?ONDING of

House C House D

Heek

33 ItaMoch

:; nannoch

Ho.

TemE. R. =1.

gr/lb.

Temp.

H.II.

r;r/lb.

1

66.0

70.0

66.5

66.0

61.0

53.8

2

3

70.0

56.0

60.2

65.0

68.0

62.3

Lj.

63.0

70.0

60.2

65.0

67.0

60.9

5

68.0

50.0

51.1

70.0

56.0

60.2

6

64.0

58.0

50.4

69.0

ＵｌｾＮＰ

59.5

7

6Lj.•0

52.0

46.2

69.0

54.0

59.5

8

65.0

66.0

60.2

66.0

53.:)

51.1

9

68.0

45.0

46.2

70.0

52.0

57.1+

10

65.0

ｌｾＵＮ

0

ｌｾｬＮ 3

63.0

ｌｾＸＮ

0 • 48.3

11

65.0

50.0

ｾＮＵＮＵ

68.0

ｾＷＮＰ

47.6

12

68.0

55.0

56.7

69.0

52.0

56.0

13

67.0

55.0

53.9

66.0

ｌｾＶＮＰ

44.1

ｬｌｾ

66.0

49.0

46.2

67.0

46.0

44.8

15

58.0

47.0

32.9

72.0

50.0

58.8

16

67.0

45.0

ＴｾﾷＮＸ

69.0

ｾＮＸＮＰ

50.4

17

68.0

h3.0 ｌｾｾ .•

8

65.0

46.0

42.0

18

70.0

ｾＮＳＮＰ ｌｾＷ .6

72

0 0

52.0

60.9

19

69.0

45.0

47.6

70.0

58.0

63.0

20

66.0

ｾＭＵＮＰ L!.3.4

72.0

58.0

56.7

21

68.0

52.0

53.9

69.0

61.0

65.1

22

65.0

57.0

51.8

70.0

60.0

65.5

23

66.0

54.0

51.8

7100

60.0

67.9

Ｒｌｾ

70.0

58.0

63.0

70.0

70.0

77.0

25

72.. 0

57.0

66.5

69.0

69.. 0

72.8

26

66.0

51j·.o

Sl.G

70.0

65.0

72.1

•

•

PORCH

I

i - - - . . . J

ﾮＭＵｾｈｅａｔｅｒ

•

<,

ｾＧＮＢＭＮＮ

o

PIPED SYSTEM

®

PLENUM SYSTEM VELOCITIES IN FPM CARPORT

I

UTILITY

0-

s

srJ

0-LAUNDRY AREA

0-

17 0 0-225 c::::::J BEDROOM 3

•

I c::::::J KITCHEN (1)-250 0-225 HALL

..

0-250 0-200

=

BEDROOM 2

,.

..

ｾ

0-300 ｾ (1)-125 0-200 ENTRY

•

-L

•

I

LIVING ROOM 0-200 @-250

=

BEDROOM I

=

0-

90 0-250 I I \

I

I

I

I

I

I

II

•

I

I

I I I

I

I I GROUND FLOOR o_t"""""SiiiMMI 2 3 4_{_} $_{_} 6 7 8 9IIiiiiiiiiiiiIIW 5r:ALE IN FEET

FIGURE

5

FLOOR PLAN OF MARK I

HOUSE

SHOWING REGISTER

VELOCITIES FOR HOUSES A 8 B

ｾｾａ

I

,

\

ｾ

, \1

__.: ,

' 1\1

/_

'

/

.

.

I

' 8

I

I

I \ / \ 1 / ' - )

Ｂｾ

I ,

/-r

-y • , " I ' , I \ I / 1 / , I I / \ I \ \ .., ' \ I

- \

\

,",

" /

\ " I \

,.'\"

\ I-I

I

｜ｴｾ

"X

\

Y

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,.Jo/

\

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_-'"

_r

-'..J \

f.--,

ＺｾＺＺＺＮＯ

30

70

60 40 co ....J <, 50 a: Co!)

28

24 20 12 16 WEEKS 8 20 ' , ｾ ! ! , , ! I I I I I I I

o

1>1Z-2.55.&-3

FIGURE 6

GRAPH PLOT OF GRAINS MOISTURE PER LB OF AIR VS WEEKS

(GRAINS PER LB - WEEKLY AVG)

70

\

"

.... 1 ' .. 1 ... 1

ｾｃ

/ "

\

\

/ '

/

",I

)./ \

D

,'"

"1

\

ｾ

,

-

I

,

\

/<; I ' ,

' /

J

" " 1 " \ _

J

I

•

' I \ />; _---

ｾ

I

' I \ ' " , V A " / , /

1/\

__ --

/

\

/

\

/

.../

\I

30 40 60 CD - l <, 50 a:: ｾ

28

24 20 12 16 WEEKS 8 4 20 I I , I ! I I I I I ! ! I , ,

o

FIGURE 13

GRAPH PLOT OF GRAINS MOISTURE PER OF AIR (GRAINS PER LB - WEEKLY AVG)

VS WEEKS

I

•

_I

I

•

CARPORT

_I

I I

I

I

I

I

I

I

I

•

_II

I 1

_ _ _ _ _ _ _ _ .... -.J

=

=

=

-

_{BEDROOM 3}

I

BEDROOM 2 STORAGE BEDROOM I

•

I .. 1111

•

ﾷｉｾｾ｜ｄ

HALL

•

₁₁₁₁ -ｓｔｏｒａｇｾ HEATER DINING ROOM

..

•

LIVING ROOM

..

.-.

KITCHEN ENTRY I PORCH I

lb

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

1

L

GROUND FLOOR 0 / 2 : 1 4 $ 6 7 ' / 1 9 / 0 P""""'1 - - _ - - - . _ . _ _ - - i!iijiOiiiII Ｂｾａｌﾣ /1/1 I'££T

OBSER VATIONS ON VISIT TO COMMODORE PARK SUBDIVISION IN DARTMOUTH, N.S. MAY 1961

On May 12, 1961, a visit was made to two crawl space houses in the Commodore Park subdivision, Dartmouth, by Mr. Bernard Sawyer of Commodore Construction, builder of the houses, Mr. D. C. Tibbetts, and A. T. Hansen of the Division of Building Research. The following is a r e s urn e of the observations made during that visit.

1. 42 Louisbourg Lane - this house was one of the original 25 houses built in the Commodore Park subdivision, and except for the increased roof slope was reputed to be of identical construction to the original Mark I Budget Research house in Preston, Ontario.

Plywood exterior - some checking was noted but did not appear to be very serious.

Interior Finish - a fairly large plaster crack was noted on the exterior wall of the living room beneath the picture window Evidence of previous condensation appeared beneath most of the windows, and near the ceiling to wall junctions on the outside walls.

Floors - the effect of plywood shrinkage could be seen where the linoleum tile joints coincided with the plywood joints. At these locations the joints in the tile opened about 1/16" to 1/8". This seems to be a fairly common condition when tile is laid directly on a plywood subfloor without an additional underlay.

Crawl space - at the time of the visit the crawl space was dry, but evidence of previous wetnes s could be seen in the fact that the paper facing on the perimeter wall insulation was almost completely disintegrated for the lower 61 1

• The insulation was installed vertically and quite

haphazardly so as to lose a considerable a.mount of effectiveness. The polyethylene ground cover was dry but did not provide complete protection against moisture rise as there were some gaps between sheets leaving as much as 6" of earth exposed.

2. 31 Valleyfield Road - this was the first house built of the so-called Mark I Budget Research series and was presumably identical to the Mark I house in Preston, Ontario. The house was occupied by Mr. J. M. Ozon who is the third owner since the house was occupied in June of 1958.

Plywood exterior - it was reported that the house was repainted 2 years ago. Extensive paint peeling was noted on the plywood exterior in the area of the bathroom.

Interior finish - some plaster cracking was noted over the door between the laundry area and kitchen, a condition noted in the Mark I house in Preston and probably due to the fact that this particular wall is heavily loaded and the joists are not doubled under partitions Here again plaster cracking beneath the living room window was noted, and there were a number of hair line cracks above doorways.

Floor - the or iginal plywood floor in the living room had been covered with vinyl tile. Flooring in general appeared in fairly good condition.

Crawl space - the owner reported the crawl space had been flooded this spring. Although dry at the time of this visit, the paper On the batts showed signs of previous wetting. There was reported to be a spring beneath the crawl space which is being drained to an outside ditch. It was reported that this house like the others in this subdivision did not have footing drains. Again the batt insulation was hung vertically and in such a way as to decrease their insulating effectiveness.

Miscellaneous - the owner appeared dissatisfied with the amount of kitchen storage provided and would also prefer to have a window in the bathroom. On the whole the house was in fairly good shape, and was generally in better condition than the one at 42 Louisbourg Lane.