Interior insulation—Characterisation of the historic, solid masonry building segment and analysis of the heat saving potential by 1d, 2d, and 3d simulation

Odgaard, Tommy; Bjarløv, Søren Peter; Rode, Carsten

doi:10.1016/j.enbuild.2017.12.008

Cited by 20 publications

(19 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 Average of two pH tests. 2 Samples from the outermost 10 mm of the insulation, near the interface between masonry and insulation.…”

Section: Ph and Mould Growthmentioning

confidence: 99%

“…A high energy saving potential is found in retrofitting of historic masonry external walls [1]. Solid masonry buildings from 1850-1930 account for 41% of all Danish multi-story residential buildings (3-6+ floors) [2]. Studies have shown average-weighted U-values of 0.83 and 1.12 W/m2•K for external walls in multi-story residential buildings built prior to 1850 and the period 1850-1930, respectively [1].…”

Section: Introductionmentioning

confidence: 99%

“…1 Estimated value based on 14 mortar products with similar density from the Delphin materials database. 2 Estimated values based on 17 mortar products with similar density from the Delphin materials database. Table 1.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Internal insulation of solid masonry walls – field experiment with Phenolic foam and lime-cork based insulating plaster

et al. 2020

Self Cite

View full text Add to dashboard Cite

The study investigated the hygrothermal performance and risk of mould growth in two thermal insulation systems for internal retrofitting purposes; a phenolic foam system with a closed cell structure, and a capillary active diffusion-open lime-cork based insulating plaster. The setup consisted of a 40-feet (12.2 m) insulated reefer container with controlled indoor climate, reconfigured with several holes (1x2 m each) containing solid masonry walls with embedded wooden elements on the interior side and different interior insulation systems, with and without exterior hydrophobisation. Focus was on the conditions in the interface between wall and insulation system, and in the embedded wooden elements. Relative humidity and temperature were measured in several locations in the test walls over two years, and the mould risk was evaluated by measurements and the VTT mould growth model. Findings for the interior phenolic foam system indicated that exposed walls experienced high relative humidity and high risk of moisture-induced problems. Exterior hydrophobisation had a positive effect on the moisture balance for the southwest oriented wall with phenolic foam. The lime-cork based insulating plaster showed high relative humidity and risk of moisture-induced problems, with and without hydrophobisation.

show abstract

“…1 Average of two pH tests. 2 Samples from the outermost 10 mm of the insulation, near the interface between masonry and insulation.…”

Section: Ph and Mould Growthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Internal insulation of solid masonry walls – field experiment with Phenolic foam and lime-cork based insulating plaster

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The risk was determined using the mathematical model for wood decay by Viitanen et al [18]. The decay model consists of two processes: (1) Activation process , is the state of the decay and determines the initiation of the Mass Loss (ML) process; (2) ML process, in which irrecoverable ML occurs when = 1. Increase in the activation process and ML occurs when RH ≥ 95% and T > 0 • C. The presented decay modeling was performed using = 1 as initial state.…”

Section: Wood Decaymentioning

confidence: 99%

“…With an increasing desire toward reduction of the global energy demand and the carbon footprint, an increased focus has been put on the building sector. Granted that the existing building stock consists of a large share of buildings constructed prior to 1945, yielding a great potential toward reaching these goals as documented in the segment study by Odgaard et al [1], many of which were built with solid masonry exterior walls. A large portion of these buildings are considered as worthy of preservation, posing several challenges with respect to renovation of the exterior walls as major exterior alterations often are prohibited.…”

Section: Introductionmentioning

confidence: 99%

Hygrothermal assessment of internally insulated solid masonry walls fitted with exterior hydrophobization and deliberate thermal bridge

et al. 2018

Self Cite

View full text Add to dashboard Cite

Relative humidity (RH) and temperature were measured in several solid masonry walls with embedded wooden beams, fitted with autoclaved aerated concrete (AAC) thermal insulation on the interior surface and exposed to a cool, temperate climate. The field study was based on the use of a 40-feet insulated reefer container reconfigured with eight 1 × 2 m holes containing the solid masonry walls. The study investigated the influence of AAC thermal insulation on the interior side with a combination of exterior hydrophobization and a deliberate thermal bridge in front of the embedded wooden wall plate using a material with higher thermal conductivity.Validated HAM simulations were used to investigate the effect of controlling the indoor humidity, and how this would affect the theoretical risk predictions from the damage models. Experimental findings indicate that hydrophobization of solid masonry walls with internal insulation have both positive and negative effects on the moisture balance of the wall, in relation to moisture-induced damage, and that a deliberate thermal bridge installed in front of the embedded wooden wall plate can reduce the moisture content in the wooden elements. Simulation findings indicate that a combination of exterior hydrophobization and decreased indoor moisture load can reduce the RH to acceptable levels in relation to moisture induced damage at the interface between existing wall and new insulation. No major changes were observed in relation to the risk of frost damage at the exterior surface. K E Y W O R D Sdamage models, field study, hydrophobization, internal insulation, mineral insulation board

show abstract

Thermal performance of lightweight concrete applications in building envelopes in Lebanon

et al. 2021

View full text Add to dashboard Cite

Innovative building materials are being used in building envelopes for reducing their heating and cooling needs. This paper aims to assess the thermal impact of using lightweight concrete in Lebanese building constructions by pouring an 8 cm thickness of lightweight concrete on the roof and the slab and replacing traditional hollow concrete block by lightweight concrete blocks.Thermal properties of two different samples were experimentally determined: the first one (558 kg/m 3 ) used for the roof and the slab and the second one (1074 kg/m 3 ) used for the walls. Then numerical simulations were carried out for a Lebanese traditional detached house using the characteristics of these two samples.The thermally improved Light Weight Concrete building (LWC) was compared to a traditional Lebanese house base case (BC) using a dynamic building energy simulation tool in the four different Lebanese climate zones: coastal, mid-mountain, mountain, and inland zones.The results highlight the effectiveness of integrating LWC to building envelopes by reducing energy consumption and improving thermal comfort in both winter and summer climate conditions and in the different Lebanese climatic zones. The paper demonstrates that the use of LWC in the vertical walls replacing the traditional hollow blocks can reduce the heating needs by up to 9 % and by up to 13 % for cooling needs. On the other hand, adding a LWC roof screed has a very high impact on cooling and heating energy consumption, which can reach up to 74 % in cooling energy savings and up to 24 % in heating energy savings.

show abstract

Interior insulation—Characterisation of the historic, solid masonry building segment and analysis of the heat saving potential by 1d, 2d, and 3d simulation

Cited by 20 publications

References 12 publications

Internal insulation of solid masonry walls – field experiment with Phenolic foam and lime-cork based insulating plaster

Internal insulation of solid masonry walls – field experiment with Phenolic foam and lime-cork based insulating plaster

Hygrothermal assessment of internally insulated solid masonry walls fitted with exterior hydrophobization and deliberate thermal bridge

Thermal performance of lightweight concrete applications in building envelopes in Lebanon

Contact Info

Product

Resources

About