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DRYING BUILDING STRUCTURAL FRAME DRYING AUCKLANDdehumidifier hire auckland

Dehumidification is mainly applied to dry out excess water content such as materials used with construction building framework or water damage.

Excess Moisture Content in Building Materials

In case of water damage, or excess moisture in timber frame, the general rule is to apply dehumidification as soon as possible, but as the nature and extent of water damage vary considerably it is necessary to assess the right approach from building to the building. Steam ‘n’ Dry Buildings Auckland have provided building dry out services, which includes blower hire and large capacity dehumidifier rental. Your local South Auckland, North Shore, East, West Auckland, Hibiscus Coast flood, and wood framing building dryers for over 32 years.

Important is how much time the water has had to penetrate the building structure, furnishings, etc. Once the air mover blower fans and industrial dehumidifiers are installed it is also essential to keep the air change as low as possible to avoid humid air from entering the room.

In case of drying out a newly constructed building, you should also keep air change low. Often you have to meet a deadline i.e. you have to consider a finite amount of time to do the job, so it’s important to have high capacity equipment such as Steam ‘n’ Dry Buildings Auckland giant 80 litre per day capacity commercial dehumidifier rentals before the Auckland Council pre-line framing moisture test inspections.

24/7 emergency Auckland drying out building services. For over 3 decades our team of building dryers includes Graeme Stephens who is believed the most experienced flood drying Auckland technician IICRC certified as Master Restoration Technician 2001 have been providing all forms of drying building structure out using powerful Steam ‘n’ Dry air mover blower rental and giant commercial dehumidifier hire service.

 

Drying Out Wood Frame Buildings

Formerly construction builders work on an average building went on for 6-9 months and the building materials were usually dried out by natural ventilation by the time the building was finished. Today, however, construction building work is very efficient and much faster. This means that dehumidification is required to remove the excess water in the various building materials before the Auckland Council pre-line building moisture test inspection and before the building can be safely occupied. Steam ‘n’ Dry Buildings Auckland have provided structural building dry out services, which includes blower hire and large capacity dehumidifier rental. Your local West Auckland, North Shore, Hibiscus Coast, East, South Auckland, flood, carpet drying, and wood framing building dryers for over 32 years.

When selecting a dehumidifier hire for drying out a building you need to consider how much water should be removed and how much time you have to do it.

This is actually quite a difficult task. In some cases, it is possible to estimate the amount of water in the building materials from tables. Please note that in regards to drying out a newly constructed building it all comes down to the specific building materials used for framing, and if applicable walls, floors, also roofs. The water content of various building materials differs so much that a simple rule of thumb is unworkable.

Graeme has been Auckland Steam ‘n’ Dry full-time building out drying, water damage flood restoration, and carpet drying Auckland specialist for over 32 years. 

Building Drying Out Theory

The water content of different building materials (kg/m3)

MATERIAL          AT START OF PROJECT        CHEMICALLY BOUND        AT 50% RH         WATER TO BE DEHUMIDIFIED

Wood                                             80                                                0                                            40                                              40

Concrete lightweight                  90                                                0                                             20                                             130

Concrete Heavy                          150                                              70                                            50                                              60

Tile Roof                                       10                                                0                                             10                                               0

Brick Wall                                    80                                                0                                             10                                               70

In this example, we want to calculate the dehumidification load required to dry out excess water from a newly constructed building in 30 days. The building is 2.8 m high, 8 m wide and 18 m long. The walls and ceiling are constructed from pre-dried wood. The floor, however, needs to be dried out as it is made from 120 mm thick concrete.

The building volumne information:

Period                              30 Days

Drying RH                         Temp = 20°C and 50% RH (average between starting humidity at 60% RH and ending at approx. 40% RH)

Building M3                      2.8 m x 7 x 18 = 403.2 m3

Dehumidifier airflow      700 m3 per hour airflow

Air mover Blower            2800 m3 per hour airflow

Concrete            120mm

The calculation:

Concrete volume to be dehumidified:
18 x 8 * 0.12 = 17.28 m3

Water content in the concrete floor:
17.28 x 48 kg water/m3 = 829.44  kg water

We need to remove 829228 Litres of water in 30 days:
Water 829.44 @ 30 days = 27.64 Litres per 24 hours

We need a dehumidification capacity of 27.64 L/24 hours.

Recommendation:

30 Day building drying out. Steam ‘n’ Dry (SND) 80. Capacity: 1.40 litre/hour at 20°C @ 50% RH. One SND 80 will remove 32.8 L/24 hours. This means that one SND 80 units dehumidifier rental should do the job in 30 days.

7 Day building drying out. (SND) 80. Capacity: 1.40 litre/hour at 20°C @ 50% RH. One SND 80 will remove 32.8 L/24 hours. This means that four SND 80 units dehumidifier hire should do the job in 7 days.

The drying process is quickest in the beginning as the water content is very high when you start the process. As the RH-value decreases, the overall dehumidification capacity will also decrease. Since 1987 Steam ‘n’ Dry Buildings Auckland has provided building drying services, which includes blower rental, and large capacity dehumidifier hire. Be ready for the Auckland Council pre-line building moisture test inspectionLocal branches in South Auckland, North Shore, East, West Auckland, Hibiscus Coast flood, and wood framing building dryers for over 32 years.

Drying Building Process

When dehumidification is used to dry out buildings and materials the dehumidifier runs continuously. The relative humidity is gradually lowered allowing further evaporation from the damp materials in the room. The amount of evaporation depends on the temperature of the room, the materials and the humidity of the air.

One of the advantages of condense drying is that the drying process is stable and gentle. If time is not of the essence the optimum dehumidification process is achieved by maintaining a stable condition of 20°C and approximately 40% RH in the room.

Add heat if necessary, but keep in mind that forcing the drying process might be harmful. There is a risk of surface drying and cavitation, with only surfaces being dried, whereas a lot of humidity remains within cavities inside the wall. Since 1987 Steam ‘n’ Dry Buildings Auckland has provided building drying services, which includes blower rental, and large capacity dehumidifier hire. Local branches in South Auckland, North Shore, East, West Auckland, Hibiscus Coast flood, and wood framing building dryers for over 32 years.  Auckland Council pre-line building moisture test inspection drying.

Remember to seal the room or building properly when it is empty. Also, remember to avoid pre-dried materials absorbing water because of open windows.

In most cases, the humidity is concentrated in areas where water is being introduced from external sources such as rain before the building roof goes on or the building is sealed off, or the construction work going on i.e. painting, concrete mixing or from. The dehumidifiers should be set up at these positions where they can do the most good.

 

Call the building drying experts Steam ‘n’ Dry Buildings Auckland since 1987 has provided building drying services, which includes blower rental, and large capacity dehumidifier hire. Local branches in South Auckland, North Shore, East, West Auckland, Hibiscus Coast flood, and wood framing building dryers for over 32 years. Phone 0800 783-266

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