ᐅ Foundation / Slab

Learn how to get everything right when building your foundation and slab – for a stable base and a safe home!

Renovation of Damp Concrete in the Garden Shed

A

Ana•12 Mar 2026 18:15

Answers: 5

KlaRa • 19 May 2026 21:28

Cement screed heating report with Estrifix additive from PCI

N

nils123•21 Apr 2026 13:19

Answers: 4

N

nils123 • 12 May 2026 23:47

Building a Pool with a Roof – Attaching a Concrete Wall to the Top with a Concrete Lid

B

Bigbuh•8 May 2026 06:33

Answers: 4

N

Nauer • 9 May 2026 22:52

Outsourcing the Foundation Slab – Sensible or Risky?

J

Jay_Kay•1 Jul 2025 21:56

Answers: 5

C

Chewie • 28 Apr 2026 15:11

Ground floor apartment, metal component is penetrating through the floor.

P

Peter347•26 Apr 2026 14:22

Answers: 1

F

Fam.Berger • 27 Apr 2026 13:00

Installing water pipes underground

R

robinb112•23 Apr 2026 19:06

Answers: 0

R

robinb112 • 23 Apr 2026 19:06

PVC pipe for ventilation in the foundation slab (also known as the ground slab or concrete slab)

M

Max2712•19 Apr 2026 20:21

Answers: 0

M

Max2712 • 19 Apr 2026 20:21

Conduits and heat pump cables were initially omitted, now planned to be added later within the foundation slab.

H

HansGerl•17 Mar 2026 14:43

Answers: 0

H

HansGerl • 17 Mar 2026 14:43

Renovation of the vertical damp-proof course – masonry junction

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hoppelstrasse•14 Mar 2026 23:46

Answers: 0

H

hoppelstrasse • 14 Mar 2026 23:46

Insulation of the Garage Slab/Foundation

H

Heli205•12 Jan 2026 14:47

Answers: 0

H

Heli205 • 12 Jan 2026 14:47

New Concrete Slab in Existing Basement

D

dedieter•5 Jan 2026 09:44

Answers: 5

T

Teimo1988 • 5 Jan 2026 22:04

Prefabricated House: Exposed Timber Frame Beams at the Base – Is Sealing or Structural Treatment Necessary?

K

kevko98•18 Dec 2025 12:13

Answers: 2

Nida35a • 4 Jan 2026 08:28

Preparing a Split Air Conditioning System: Is Running Refrigerant Lines Through the Concrete Slab Advisable or Risky?

N

Netspider88•22 Dec 2025 18:45

Answers: 1

G

Grundaus • 30 Dec 2025 16:20

Proper Floor Construction in an Utility Building with Brick Paving?

N

Nicki3005•20 Dec 2025 21:15

Answers: 0

N

Nicki3005 • 20 Dec 2025 21:15

Check the basement slab for gravel pockets, uneven areas, and potential construction defects.

M

Mojo190•5 Dec 2025 14:48

Answers: 1

M

MachsSelbst • 6 Dec 2025 10:58

Extension of the ground floor concrete slab with a cantilevered section

T

trissedp•5 Dec 2025 14:25

Answers: 0

T

trissedp • 5 Dec 2025 14:25

How to Seal Holes in a Concrete Slab?

K

Kaltluftfan•21 Nov 2025 11:57

Answers: 2

T

Teimo1988 • 24 Nov 2025 22:38

Is the waterproofing of the foundation slab properly executed?

L

lightmoor•14 Oct 2025 20:11

Answers: 0

L

lightmoor • 14 Oct 2025 20:11

Formwork for the foundation slab

G

grunlilie•6 Oct 2025 21:44

Answers: 14

M

Molybdean • 9 Oct 2025 07:20

Is the foundation slab waterproofing acceptable, or could it cause issues?

S

Schlaumeier86•10 Sep 2025 12:36

Answers: 0

S

Schlaumeier86 • 10 Sep 2025 12:36

Waterproofing of foundation slab for the load case of hydrostatic pressure

B

blablub•10 Aug 2025 13:10

Answers: 6

B

blablub • 12 Aug 2025 21:03

New Concrete Slab in an Older Building, Any Experiences?

M

manu986•5 Aug 2025 13:57

Answers: 8

D

DoTrouv • 6 Aug 2025 10:23

Prepare for a detached garage to be added later

B

Bierwächter•14 Jul 2025 19:48

Answers: 12

B

Bierwächter • 31 Jul 2025 21:20

Masonry pillars for driveway gate

B

benchfreak•28 Jul 2025 17:55

Answers: 3

M

Mrnobody • 30 Jul 2025 03:31

Older Building / Strip Foundation - Site Plan, Water, Clay Soil, Drainage

R

rschraml•27 Jul 2025 13:45

Answers: 1

11ant • 28 Jul 2025 16:54

Waterproofing and perimeter insulation

C

Cantaloupe•26 Jul 2025 06:16

Answers: 2

A

Allthewayup • 26 Jul 2025 21:30

Foundation for Post-Supported Patio Roof

P

Prager91•14 Jul 2025 09:45

Answers: 9

P

Prager91 • 21 Jul 2025 07:09

Concrete slab and house protected against moisture with dimpled membrane? Any experiences?

B

Bauherrin123•21 Jun 2025 23:04

Answers: 33

D

derdietmar • 23 Jun 2025 15:24

Floor Structure in a Renovation Project from 1935 – Questions About Concrete Slab and Waterproofing

K

Knisob23•20 Jun 2025 16:32

Answers: 0

K

Knisob23 • 20 Jun 2025 16:32

Perimeter Insulation and Waterproofing for Older Buildings Without a Foundation

K

kettjen•11 Jun 2025 18:29

Answers: 0

K

kettjen • 11 Jun 2025 18:29

Strip foundation for garage with rainwater downpipe connection

M

Moustache•4 Jun 2025 21:52

Answers: 5

T

Teimo1988 • 5 Jun 2025 21:56

Large Cracks in Zech Concrete Slab of the Attic Floor

H

hausbaudre•15 May 2025 22:05

Answers: 0

H

hausbaudre • 15 May 2025 22:05

Constructing a Garage Threshold With or Without Steel Angle Brackets

F

fyaylmf•15 May 2025 09:36

Answers: 0

F

fyaylmf • 15 May 2025 09:36

Searching for Materials for a Garage Floor Slab

P

PinkyPinky•14 May 2025 11:37

Answers: 5

N

nordanney • 14 May 2025 15:28

Sealing between the concrete slab and the reinforced concrete wall

K

kamilov80•27 Apr 2025 11:18

Answers: 3

Lüftermax • 1 May 2025 21:04

Insulation of the Basement Slab Using Thermo-Brick

0

009_frank•28 Apr 2025 21:46

Answers: 12

0

009_frank • 29 Apr 2025 19:59

New Concrete Slab for a New Build – Is Demolition Required?

M

Marcel_89•22 Mar 2025 13:29

Answers: 3

11ant • 22 Mar 2025 21:20

Kitchen Planning – Is It Still Possible to Relocate the Drain?

S

Steven_1977•25 Feb 2025 22:34

Answers: 4

Tolentino • 26 Feb 2025 12:35

Construction of the gable wall – interior side

K

ketiv75•25 Feb 2025 11:24

Answers: 1

K

ketiv75 • 26 Feb 2025 10:06

Waterproofing membrane on the foundation slab (concrete slab)

K

ketiv75•24 Feb 2025 14:35

Answers: 3

H

Harakiri • 26 Feb 2025 08:29

Installing HCPlan/HPL panels into the ground as a boundary.

K

Kubasilver•17 Feb 2025 00:11

Answers: 0

K

Kubasilver • 17 Feb 2025 00:11

Perimeter insulation on the edge of the concrete slab

D

Daniel.•16 Feb 2025 08:44

Answers: 3

H

Harakiri • 16 Feb 2025 13:33

Insulating a wood-based floor slab with straw

L

landhausbauer•29 Jun 2020 21:01

Answers: 20

B

blubbl84 • 13 Jan 2025 11:09

Base plaster is absorbing water? Does anyone have experience with this?

W

WilhelmRo•12 Jan 2025 13:02

Answers: 2

T

Teimo1988 • 12 Jan 2025 14:51

Construction of the Old Building’s Concrete Slab – 1964 – Section Available

B

BigTripleA•8 Jan 2025 20:09

Answers: 1

11ant • 8 Jan 2025 22:21

Is Concrete Core Activation Practical for a Slab Foundation in a Bungalow?

V

victoriafaelle•23 Dec 2024 20:21

Answers: 6

V

victoriafaelle • 25 Dec 2024 15:09

Fill hole in screed and deeper layers

B

BauWies24•23 Dec 2024 20:43

Answers: 0

B

BauWies24 • 23 Dec 2024 20:43

Use of Earth Materials Z 1.1

E

Endorphin•9 Dec 2024 17:14

Answers: 5

M

MachsSelbst • 13 Dec 2024 23:55

KfW 40 / 40 Plus Insulation for the Foundation Slab

M

m0LN4rius•4 Dec 2024 14:57

Answers: 4

11ant • 6 Dec 2024 14:05

House crooked, paving uneven, or exterior plaster uneven?

S

Schlaumeier86•28 Nov 2024 17:00

Answers: 7

11ant • 29 Nov 2024 13:28

Water in the garage. Possible damaged slab foundation? Any experiences?

F

Fabian14•28 Nov 2024 01:05

Answers: 0

F

Fabian14 • 28 Nov 2024 01:05

Concrete slab damp on the underside – what could be the cause?

S

Steve55•26 Nov 2024 18:46

Answers: 4

S

Steve55 • 27 Nov 2024 16:18

Is an existing 30 cm foundation strong enough to support an additional story?

W

Werner0•22 Oct 2024 11:06

Answers: 3

S

Simon-189 • 24 Oct 2024 12:48

Base waterproofing of the slab edge – correct positioning of the waterproofing?

S

Schischuh•3 Dec 2023 18:42

Answers: 7

H

Harakiri • 15 Oct 2024 07:58

Base waterproofing in timber frame construction

S

Sockeldichtung•26 Sep 2024 22:34

Answers: 0

S

Sockeldichtung • 26 Sep 2024 22:34

Concrete slab in an older building – only gravel with a 3 cm cement layer underneath

M

Markus-44240•21 Sep 2024 16:58

Answers: 3

B

Buchsbaum066 • 25 Sep 2024 09:40

Should the screed be installed as soon as possible after pouring the foundation slab?

D

DEKU_1992•28 Jul 2024 02:49

Answers: 6

N

nordanney • 13 Sep 2024 09:49

Edge trim as a base cladding in an older building?

S

SimonB87•4 Sep 2024 20:37

Answers: 1

Nida35a • 4 Sep 2024 20:45

Drainage According to the Soil Report – But How?

S

Steve55•30 Jul 2024 18:32

Answers: 4

S

Steve55 • 31 Jul 2024 12:05

Geotextile Fabric in Foundations – Incorrect Durability Class (DC)

S

Steve55•27 Jul 2024 02:19

Answers: 0

S

Steve55 • 27 Jul 2024 02:19

How can the costs for a slab foundation with HQ100 be estimated?

S

steeven01•19 Jul 2024 15:31

Answers: 3

S

steeven01 • 26 Jul 2024 08:02

Poor Workmanship in Earthworks – Excavation Reaching Groundwater

S

Steve55•24 Jul 2024 07:48

Answers: 4

S

Steve55 • 26 Jul 2024 02:40

Dynamic bearing pressure test failed even after additional compaction

L

LabMember001•24 Jun 2024 21:34

Answers: 4

C

Cronos86 • 25 Jun 2024 21:15

Missing Areas in the Base Coat Plaster – How to Correct Them Properly?

M

Markus_1989•26 May 2024 18:50

Answers: 0

M

Markus_1989 • 26 May 2024 18:50

Retaining Wall 60 cm High – Is a Foundation Necessary?

M

Mateo84•13 Mar 2024 13:44

Answers: 12

M

Mateo84 • 8 May 2024 12:01

Screw foundations as an affordable alternative to concrete slabs?

S

Schwabe23•25 Jun 2021 20:19

Answers: 24

M

michael1966 • 28 Apr 2024 18:32

The wall is not aligned properly with the concrete slab and extends about 2 cm beyond it.

B

Bauherr am L•4 Jan 2020 09:37

Answers: 26

H

hanghaus2023 • 17 Apr 2024 20:51

Concrete slab with strip foundation directly on topsoil?

N

Nico79Bln•16 Apr 2024 07:50

Answers: 1

C

Cronos86 • 16 Apr 2024 10:04

Is a foundation necessary for containers? If so, how should it be done?

W

wobbbel•13 Mar 2024 19:13

Answers: 9

DeepRed • 14 Mar 2024 08:06

Construction of the Slab Foundation, Base Wall, and Perimeter Insulation

J

JKHandler•10 Mar 2024 13:29

Answers: 2

J

JKHandler • 12 Mar 2024 21:46

Bitumen coating for concrete walls

Z

Zizou_Bh•8 Mar 2024 13:50

Answers: 4

A

Allthewayup • 8 Mar 2024 21:43

Peat in the Soil – Pile Foundations, Well Foundations, or Vibro-Concrete Columns?

N

Nordlichter•5 Feb 2024 12:04

Answers: 13

11ant • 8 Mar 2024 13:08

Concrete slab with polymer fibers and reduced reinforcement steel

R

roestzwiee•3 Feb 2024 09:43

Answers: 23

X

xMisterDx • 29 Feb 2024 12:56

Concrete slab allows moisture to rise upwards

G

GarfieldPB•15 Feb 2024 17:32

Answers: 1

W

WilderSueden • 15 Feb 2024 17:46

Wall collar forgotten with Kabuflex – how to seal it?

B

BoPaDi24•13 Feb 2024 11:38

Answers: 8

B

BoPaDi24 • 14 Feb 2024 17:01

Vapor-tight connection between the exterior wall and the foundation slab

P

parallelsym•4 Feb 2024 18:35

Answers: 9

S

Stephan— • 5 Feb 2024 08:23

Strip foundation preparation: later compact recycled sand

W

wlantubbie•3 Feb 2024 09:01

Answers: 0

W

wlantubbie • 3 Feb 2024 09:01

Strip foundation or formwork blocks?

B

Baggerparty•30 Jan 2024 20:09

Answers: 1

S

Simon-189 • 31 Jan 2024 06:59

Interpretation of the Soil Report

S

Schnubbihh•2 Jan 2024 15:15

Answers: 19

11ant • 15 Jan 2024 15:32

Repairing the edge of the foundation slab / concrete patching

B

Barnhouse•8 Jan 2024 20:08

Answers: 4

W

WilderSueden • 10 Jan 2024 21:34

How does water get into the basement?

P

Phoenix1985•9 Jan 2024 06:05

Answers: 9

A

Allthewayup • 9 Jan 2024 23:12

Significant Water Damage in a New Build – But What Caused It?

S

Simon-L•6 Jan 2024 03:09

Answers: 12

H

hanghaus2023 • 7 Jan 2024 10:48

Thermal Insulation for the Ends of the Concrete Slab and Strip Foundation?

E

elbeseite•4 Dec 2023 13:54

Answers: 0

E

elbeseite • 4 Dec 2023 13:54

Foundation: Estimation of the Volume of Fill Gravel for a Single-Family House

B

Baggerparty•8 Nov 2023 00:04

Answers: 5

B

Baggerparty • 2 Dec 2023 01:37

Is an 80 cm gravel layer necessary beneath a 25 cm thick concrete slab for frost protection?

R

Regina1991•26 Nov 2023 14:50

Answers: 8

O

Oberhäslich • 28 Nov 2023 19:36

Excavation for strip footing too wide

S

StefanS83•13 Nov 2023 21:44

Answers: 8

ateliersiegel • 15 Nov 2023 11:45

Should the slab be notched out, cut away, or left as is?

M

morgenstern•13 Nov 2023 23:21

Answers: 0

M

morgenstern • 13 Nov 2023 23:21

Incorrect Foundation Leading to High Follow-Up Costs

M

meinhaus2020•9 Nov 2023 18:56

Answers: 12

W

WilderSueden • 10 Nov 2023 09:33

New Construction Settlement Cracks in a Masonry Basement: What Is Still Considered "Normal"?

C

Claus001•1 Nov 2023 14:10

Answers: 12

B

Buchsbaum • 1 Nov 2023 21:36

Frost protection (frost-free foundation) for concrete support columns through insulation

W

wackelzahn•23 Aug 2023 16:36

Answers: 3

W

wackelzahn • 24 Aug 2023 15:35

Foundation extension for a terrace using "recycled" sand?

P

Pivi2000•9 Aug 2023 14:02

Answers: 5

Y

ypg • 16 Aug 2023 22:12

Frost-Protected Foundation for a Wall Adjacent to an Existing Neighboring Boundary Fence

X

Xhnnas•19 Jul 2023 08:36

Answers: 15

B

Benutzer 1001 • 3 Aug 2023 08:52

Rainwater in the excavation pit – what to do?

W

wanderjupp•21 Nov 2015 13:45

Answers: 8

A

Allthewayup • 5 Jul 2023 21:21

Concrete slab for a 7x3 meter cold conservatory or strip footing (foundation)

A

Allthewayup•17 Jun 2023 22:19

Answers: 4

A

Allthewayup • 19 Jun 2023 16:56

Sealing of the raw concrete floor slab on the XPS insulation layer

B

bowbow91•11 Jun 2023 11:00

Answers: 1

H

Harakiri • 13 Jun 2023 13:07

Shear plate load tests fail repeatedly

P

Pitiglianio•27 Jul 2022 15:48

Answers: 14

P

Pitiglianio • 15 May 2023 13:06

Lack of a foundation slab for the garage

M

MrAgain•9 May 2023 07:16

Answers: 4

Tolentino • 15 May 2023 00:55

Is it advisable to have the foundation slab inspected by a building surveyor?

B

bavariandream•5 Jan 2023 12:28

Answers: 55

Tolentino • 7 May 2023 18:46

Foundation for a 3x3 meter pergola

P

Peter Silie•5 Apr 2023 10:54

Answers: 12

i_b_n_a_n • 19 Apr 2023 13:47

Renovation of Flush Base Slab/Foundation Slab

B

Bausabine•19 Apr 2023 10:42

Answers: 0

B

Bausabine • 19 Apr 2023 10:42