The Research

In 1988, scientific research was done on the Schrijver systeem®. The research consisted of two tests, and the results of the first test below shows excellent results. In this test the water saturation of two test walls was registered for a period of 12 weeks. Both walls had been placed into containers for 3 weeks to absorb water until the point of saturation was reached and the level of water absorption had dropped to a minimum.
Table 1 shows a clear difference between wall A (with the Schrijver systeem®) and the wall without the system in terms of relative humidity (RH).

Readings in the cavity
Date	Wall A	Wall B	Difference A & B in %
21 November	83% RH	95% RH	12% RH
19 December	62% RH	94% RH	32% RH
21 January	50% RH	82% RH	32% RH

Readings behind the cavity
Date	Wall A	Wall B	Difference A & B in %
21 November	42% RH	57% RH	15% RH
21 January	31% RH	49% RH	18% RH

table 1

graph 1

Test II: Test Results

Every day throughout the test period, each element removed 339 ml of water in the wall fitted with the Schrijver systeem® (wall A). Only 140 ml of water was removed from wall B without the system (see table 2). (1000 ml is approx. 1/5 gallon). A difference of almost 200 ml per element per day!
The impact the Schrijver systeem® has on the relative humidity (RH) was also recorded (figure 2). Here the test results were remarkable too. The RH in the enclosed space behind wall A where the Schrijver systeem® was located was lower by 30% than the RH in the space behind the wall without the system. An outstanding result.

Date	Wall A with Schrijver systeem	Wall B without Schrijver systeem	Difference A & B in milliliters
28 October	0 mL	0 mL	0 mL
6 November	1350 mL	830 mL	485 mL
12 November	3000 mL	1720 mL	1280 mL
27 November	3649 mL	1000 mL	2649 mL
14 December	4600 mL	1850 mL	2750 mL
2 January	5300 mL	950 mL	4350 mL
total with wind	52123 mL	21539 mL	30584 mL

table 2

There is a clear difference between wall A and wall B. After 11 weeks and using only two elements, the difference was more than 30 liters (6.6 gallons)! As the Schrijver systeem® works all year round, it will continue to remove damp after the 11 week period, as it is an ongoing process.

	Wall A	Wall B	Difference A & B in milliliters
total without wind	72 mL	9 mL	63 mL

table 3

Even without windy weather conditions, wall A with the Schrijver systeem® removes substantially more water than wall B without the system installed.

graph 2

Summary

The Schrijver systeem® is an essential factor in eliminating, preventing and controlling problems caused by damp. The multifunctional results (dry walls and a decrease in the relative humidity within the house) brought about this system, means that you can achieve a dry and healthy living environment and a substantial cut in heating bills. Thanks to this system the building will be better preserved. The system requires little maintenance once it's been installed. In short: a unique, environment friendly system, which you should not be without in a countries such as the United Kingdom!

References

References: Who uses the Schrijver systeem®? Continue reading...